-f &£?%* i n . tf//s a w^ t^^^ ® LIBRARY OF CONGRESS, Shelf x UNITED STATES OF AMERICA. *rf K : '^ . m£ ' -<*♦© :,'■ ■ • JSS 'if ^ ISPIEJ £*& a*a ->^/ i£ '" ■;•-<#■ w fi/ v :%&&: ^ 5U^ HI® m& 4 nis^S %**■ ^V ££ ^*ZH: f \ ^v7* ESS THE FAIRCHILD PREPARATIONS — OP — TBI PURE DIGESTIVE FERMENTS, Active, Permanent and Reliable. TRYPSIN (fairchild) Especially Prepared as a Solvent for Diphtheritic Membrane. PEPTONISING TUBES. (fairchild). For the preparation of PEPTO- NIZED MILK and other predigested food for the sick. PEPSINE IN SCALES. (fairchild). The most active, permanent and re- liable pep sine made in the World. ESSENCE OF PEPSINE (fairchild). For administration where a fluid and agreeable form of pepsine is desired, and for the prepara- tion of Junket and Whey. EXTRACTUM PANCREATIS. (fairchild). Containing all the digestive ferments of the Pancreas. PEPTOGENIC MILK POWDER (fairchild). For the modification of cows' milk to the standard of A r ormal Mother's Milk. PEPSINE IN POWDER. (fairchild). Prepared from the scales without the admixture of any other sub- stances, to facilitate dis- pensing and the pre- paration of saccharated pepsine. DIASTASIC ESSENCE OF PANCREAS. (fairchild). For the digestion of starchy foods. Fairchild Bros. & Foster, 82 AND 84 FULTON ST., NEW YORK. A TREATISE NEURALGIA E. P. HURB, M. D., Member of the Massachusetts Medical Society; Member of the Climato- logical Society; Member of the Society de Medecine Pratique (Paris, France). One of the physicians to the Anna Jaques Hospital, Newburyport. Mass. ■ It' GEORGE S. DAVIS, DETROIT, MICH. Ik H1 G Copyrighted by GEORGE S. DAYIS. 1890. DEDICATED TO DUJARDIN BEAUMETZ, WHO HAS DONE SO MUCH TO ADVANCE THERAPEUTICS. BY HIS FRIEND, THE WRITER. TABLE OF CONTENTS. CHAPTER I. Page. General Considerations on Neuralgia 1-18 CHAPTER II. Classification of the Neuralgias 19-23 CPAPTER III. The Causes of Neuralgia 24-30 CHAPTER IV. Particular Forms of Neuralgia 31-56 CHAPTER V. Visceral Neuralgias 57-7Q CHAPTER VI. Reflex and Toxic Neuralgias; Neuralgias Due to a Gen- eral Morbid Condition 71-82 CHAPTER VII. Diagnosis 83-92 CHAPTER VIII. Prognosis 93 CHAPTER IX. The Treatment of Neuralgia 94-106 CHAPTER X. Appendix 107-143 CHAPTER I. GENERAL CONSIDERATIONS ON NEURALGIA. Pain is a fact of consciousness, having for its invariable antecedent a disturbance of a sensory nerve or nerve-centre. Its seat is that part of the cerebral cortex known as the sensorium; the cause is generally an abnormal modification of some part of a nerve of sensation. The function of sensory nerves being to convey impressions to the sensorium,* when such im- pressions are abnormal in kind or in intensity, the phenomenon of pain may arise. One of the most com- mon excitants of pain is inflammation, which causes compression of the nerves of a region and disturb- ance of their nutrition and function. Another cause is anaemia, or want of blood, for no pain is more in- tense than that which is experienced in a limb whose supply of blood is cut off by an arterial embolus. Tumors, foreign bodies as splinters, wounds or compression of nerves, also bring about those molecular changes in sensory conductors whose conscious expres- sion is pain; and the same may be said of an inflamma- tion confined to the sheath of the nerve itself. In fact, * By the term sensorium, I understood with Robin, that portion of the encephalon which perceives, as distinguished from that which thinks, and from that which is endowed with motricity. 2 pain may be looked upon as a cry of danger, as an index of a destructive process somewhere going on in the organism. Many kinds of pain have known pathological con- ditions for their substratum; the pain is the result of a phlegmon, a tumor, etc. This is not the case with the kind of pain of which we are here to treat, for neuralgia belongs to a class of nervous diseases known as neuroses — i. e., which are functional or dyna- mic, not dependent on any gross anatomical lesion. Neuralgia is a neurosis whose essential symptom consists in a lancinating pain, paroxysmal in character, described as boring, burning, stabbing, localized in particular nerve-trunks or their terminal branches; apyretic, without redness, without tension or apparent swelling; generally accompanied by secondary phe- nomena of a motor, vaso-motor, secretory, or trophic nature.* Spring thinks that in order that the word neural- gia should be applicable to any particular case, there should exist two conditions: i, the pain should be paroxysmal in character; 2, there should be no peri- pheral or central lesions present. f Gowers would restrict the name neuralgia to the idiopathic class, and would exclude all forms (among * The throbs of pain sometimes coincide with the arterial pulsations (Gowers.) f Dujardin-Beaumetz, " Clinical Therapeutics," American ed., p. 51. — 3 — which he thinks sciatica generally belongs) which are the result of neuritis. General Characteristics. — A general feature of neuralgic cases is the existence of anaemia and debil- ity. Anstie insists on this condition of anaemia, or vital depression, as an invariable factor in neuralgia. The patient has been fatigued from overwork, physi- cal or mental, or has gone through an exhausting ill- ness. Prolonged suppurations, haemorrhages, exces- sive venery, in fact debilitating influences of all kinds, may bring about the neuralgic diathesis. One of the most severe and obstinate cases of gastralgia that I ever witnessed was in a young woman who, while nursing a robust infant, carried on the work of a large family while living on a meagre and quite insufficient diet. Another characteristic is that exhaustion, from any cause, brings on an attack of pain. The victim of hemicrania, for instance, will have an attack after the fatigue of too long a walk, or a night's watching. Another common feature of the neuralgias is the intermittence of the pain. The symptoms are par- oxysmal in character: this is owing to the law of nervous exhaustion, for nervous actions are not con- tinuous, but interrupted by periods of repose, due to exhaustion of the excitability, even when the excite- ment is persistent.* *Jaccoud, Pathologie Interne. Vol. i, p. 485. In consequence of a fancied resemblance between the phenomena of neuralgic paroxysms and those of genuine intermittent, Van Swieten applies the name oifebris topica to the former, and declares neuralgia to be only another manifestation of ague; with this view other ancient authorities coincide.* It is not an uncommon thing for a paroxysm of neuralgic pain to pass off after an hour or two of severity, leaving a state of perfect quiescence; oftener however, it must be confessed, a deep, contusive, fixed or diffuse pain remains till the next attack, which may come on in a few hours, or not till the sleep of the night is over. The resemblance to an access of intermittent fever, it must be confessed, is superficial and slight, but the paroxysmal character is none the less a fact. Another event common to all the neuralgias is the occurrence of certain tender spots ( points doul- oureaux) which are always found in neuralgias of a certain persistence and duration. These are called Valleix's painful points. These painful spots are gen- erally situated at the point where a nerve trunk emerges from a bony foramen, or pierces the fascia of a muscle to be distributed to the skin. These spots are sometimes the centres of radiation of spontaneous pain; pressure upon them provokes very severe pain which may intensify the neuralgic attack. Lastly, another peculiarity of neuralgias is their * Rowland On Neuralgia. 1837. generally unilateral character. This is so much em- phasized by Anstie, that it forms a part of his defini- tion.* Clinical Description. — As a type of our descrip- tion, we will take a case of facial neuralgia, known also as neuralgia of the fifth, or trigeminus. The pa- tient may have been well up to the time of the attack; or, as is oftener the case, may have been depressed from cold, insomnia, overwork. Suddenly, or after certain premonitions, as nausea, chilliness, a sense of weight about the head, and a vague feeling of gen- eral discomfort — a circumscribed pain makes its ap- pearance in some point of the face, or in one of its cavities. This pain, at first dull and contusive, soon becomes more intense, darts up and down one of the main trunks, and affects simultaneously numerous branches. The attack may consist of a continuous ache, or of a succession of violent twinges, with com- parative ease in the intervals. In the height of the paroxysm, the pain seems to shoot into every nerve twig of the affected side, with predominance of aching in one particular spot where it first started. A pecu- liarity of the pain is that it manifests itself in a series of shocks more or less near together, though each series is separated by an appreciable interval; the sum of these series constitutes the attack. The * Anstie, Neuralgia and the Diseases that Resemble It, New York, D. Appleton & Co., 1883. duration of the paroxysm is from a quarter of an hour to an hour and a half; in one inveterate case, I have known the paroxysms to last all day, with only brief intervals between. The pain is increased and even awakened by a touch of the hand, while it is often the case that gentle rubbing, or even firm press- ure over the affected part, produces alleviation.* With the pain, there is frequently spasmodic twitching of the neighboring muscles, and sometimes rigid spasm. The existence of tetany in true neu- ralgia is denied by Vanlair, but it has been noted by other writers, and the writer saw a remarkable instance of contracture of the elevator muscles of the shoulder in a severe case of cervico-brachial neuralgia, f Secondary phenomena of a vaso-motor kind, as flushing of the affected region, copious lachrymation from the neighboring eye, or running from the nostril on that side, are frequent accompaniments of the attack. Pressure over Valleix's points is generally ex- ceedingly painful; these, in trigeminal neuralgia, are :g| at the supra-orbital and infra-orbital and mental foramina. Good observers, however, have failed to recognize these painful points in facial neuralgia. * A short pressure is followed by exaggeration of the pain, a prolonged pressure, by diminution (Romberg). The con- tinuous pressure interrupts conductibility. f Medical Record, 1 876, page 744. The tactile sensibility of the skin is almost al- ways diminished after a time in the neighborhood of the affected nerve. (Buzzard.) The pain is very apt to radiate from the affected region to the nerves (sensory and motor) of neighbor- ing regions. Thus, in trigeminal neuralgia, we may have pains in the posterior cervical region and the occiput, scapuloclavicular, intercostal, and mammary regions. The motor irradiations consist in the clonic contractions (more rarely tonic) already alluded to; the muscles innervated by the facial nerve are con- vulsed. When facial neuralgia assumes this violent form, it is called tic douleureux. The convulsive shocks sometimes extend to the symmetrical muscles of the other side of the face, and even to the muscles of the trunk and limbs. The attack of pain may pass off gradually, a dull aching and a soreness remaining for some time, or it may end suddenly, the patient passing, as by magic, from intense suffering to complete repose. The latter mode of termination is especially likely to follow a judicious anti-neuralgia treatment. THE PATHOGENY OF NEURALGIA. We know very little about the material alterations which attend neuralgia. We distinguish three phases in the operation of sensory nerves: i. When the conduction is normal. Here the nerve conducts to the cerebrum impressions natural — 8 - in quantity and quality; the resulting sensations are pleasurable or indifferent. Such normal conduction is a necessary condition of that correspondence be- tween the organism and its environment which enables the former to adjust itself to changes outside of itself. A stimulus (heat, cold, a touch, some chemical or mechanical irritant, etc.), produces a certain effect of a chemical, molecular kind, on the terminal filaments or trunk of a sensory nerve — this molecular change is propagated as a wave of motion to the cord and sen- sorium, where it produces the appropriate sensori- motor responses; there is a definite ratio between the stimulus and the effects engendered. 2. When the excitability is exaggerated; this state is called hyperesthesia (excessive sensibility). The functional activity of the nerve is exalted from intensity of the excitation. When this hyper- sensibility reaches a certain degree it becomes pain, but this lasts no longer, or but little longer, than the excitation which has given rise to it. Instances of this functional hyperesthesia are seen in all inflamma- tions attended with pain. 3. When the conduction is abnormal; the resulting sensations are the consequence of a morbid irritability of the nerves and nerve centres. This form has been called by Jaccoud "spontaneous hyperesthe- sia," and characterizes all the neuralgias, "A morbid hyperesthesia raised to the potency of spontaneous — 9 — pain constitutes neuralgia." *The word spontaneous, as here used, " does not imply the absence of any cause capable of accounting for the anomalous state of the nerve; it indicates simply that this anomalous state is not linked to the exercise of the function of sensibiK ity, as is the case with a pain occurring in connection with the inflammation of a part." It is difficult to find illustrations which can make plain the difference between these several modes of conductibility, and the consequent state of consciousness. If we place a number of marbles in a row, an impulse at the proximal end of the line will be trans- mitted to the distal end with a quality and intensity corresponding to the force communicated to the first marble of the series. We may suppose the molecules of a sensory nerve to be so arranged that an agitation at the peripheral end is similarly transmitted. Im- pacts beyond a certain intensity might produce at the central end a shock which would so disturb the sen- sorial centers as to give rise to the phenomenon of pain; and yet there would be a definite correspond- ence between these central molecular disturbances and the amounts of peripheral irritations. If we could imagine that each marble of that row was composed of something akin to dynamite; that there were irreg- ular, fitful explosions all along the line from the most * Jaccoud, loc. cit. IO — trifling causes, and that the quantity and intensity of the disturbance at the distal end bore no propor- tion to the force which started the disturbance, we might have, perhaps, a faint notion of the condition of the perturbed sensory nerves in a case of neuralgia. There certainly is no objection to the hypothesis — which alone explains the facts — that the protoplasmic molecules of certain portions of the sensory apparatus in neuralgic patients are in a state of peculiarly un- stable equilibrium, at the least provocation falling to a lower plane and liberating force, which is propagated as a motor- wave to the central end; that such nerves are by this very instability and explosiveness ill-fitted for their ordinary functions of conductors of sensory impressions, while always predisposed to be the seats of violent attacks of spontaneous pain. Writers have objected to the word hyperesthesia as used in connection with the pain of neuralgia, and Vanlair has substituted the word hyperalgesia. If the former term may be supposed to mean exalted function, it is manifestly inappropriate; if exalted irritability, it is perfectly proper. It does not require a wide familiarity with various kinds of pain to convince one that where there is pain, there is increased excitability of a cer- tain nerve or nerves; nor is it difficult, from personal experience, to recall instances where this hyperesthe- sia, by the very fact of intensification, has run into pain, as in the sensory hyperesthesia attending an — II — ophthalmia.* The pains from palpable organic causes imperceptibly shade into those properly regarded as neuralgic, and there is no absolute line of demarca- tion at the origin. All kinds of pain have for their direct antecedent, excessive molecular transformation, and all are markedly influenced by anaesthetics, by quiet, absence or removal of stimuli; in fact, some pains of an undoubted neuralgic character get well as soon as all periphereal excitations are removed. * Gowers, in his treatise on neuralgia, lays emphasis on the argument by which definite nerve paths for pain, and con- sequently definite nerve centres for pain in the cerebrum are affirmed. Thus, tactile impressions pass up to the brain in the posterior columns, painful impressions and impressions of heat in the gray substance, as shown by experiments on animals and by clinical observations. In some instances (as cases of hysteria) there is conservation of the sense of touch and want of appreciation of pain. Chloroform abolishes pain while often in the anaesthesia of chloroform sensibility to touch re- mains. Then, again, there is the electric sense and the sense of tickling, which are modalities of the sense of touch, and which under some circumstances are abolished, while other forms of sensibility persist. Brown- Sequard has done much toward the demonstration if not mystification of this subject; among those who insist on definite specialization of nerve fibres and centres for the various modalities of sensation, we may mention Herzen, Magnus Blix, Donaldson, and Goldscheider. It cannot, however, be said that there is yet anything like agreement among physiologists respecting this vexed ques- tion, and we find Vulpian maintaining to the last as the result of his experimentation the doctrine of " indifferent conductibility." That pain is not something special, underived from and 12 The causes of neuralgic hyperesthesia may be arranged in three orders*: i. Intrinsic and primary modifications of the excitability of the nerve itself in some part of its tract from the gray nucleus of its origin to its terminal ex- pansions. 2. Extrinsic lesions, which act directly, or indi- rectly by reflex action. 3. Constitutional states which modify the ner- vous excitability, generally by the intermediation of an alteration of the blood. The first group contains the primary, or essential neuralgias; the other two groups, the secondary, called sympathetic or symptomatic neuralgias. An example of primary idiopathic neuralgia is seen in face-ache (prosopalgia) from cold. Examples of neuralgia due to extrinsic lesions acting directly, are seen in attacks of prosopalgia starting in dental separate from ordinary sensibility, is seen in the fact that there is no particular exciting agent productive of pain; the exagger- ation of any kind of special sensibility may produce it; — too strong a light by affecting injuriously the retina, sounds too in- tense by violent agitation of the auditory nerve, thermic excita- tions carried to the extreme, intense cold, sufficient to produce disorganization of the tissues (Mathias Duval). Duval's defi- nition of pain is a fairly good one: " Pain is constituted by a modality in the functionment of the centres, due to the fact that impressioning agents act in a violent, exaggerated manner, and inflict a perturbation on the organs of sensibility." * Vide Jaccoud, loc, cit. article, Nevralgie. — 13 — caries, or a tumor involving a branch of the trige- minus; such lesions have been known to awaken neu- ralgic paroxysms indistinguishable from those of idiopathic prosopalgia. Illustrations of neuralgia from reflex causes are seen in trigeminal, cervico- brachial, or intercostal neuralgias, originating in ovar- itis, or some other affection of a remote organ. Examples under the third head are seen in neuralgias due to lead poisoning, mercurial poi- soning, syphilis, or malaria. The neuralgias accom- panying anaemia and chlorosis are also generally classed under this head, being due to blood deprave- ment. Is it possible, from the knowledge which physiol- ogy gives us of the constitution of nerves, to come any nearer to an understanding of the phenomena which take place in neuralgia? The conductibility of nerves is a property inher- ent in the axis cylinder, which is the central core of the nerve, and is composed of protoplasm. The ulti- mate peripheral termination of sensory nerves is the naked cylinder. On these protoplasmic filaments, which in many parts of the body terminate in sundry appliances (Paccinian corpuscles) which are " multi- pliers of disturbance," and have the function of con- centrating on the nerve ends the action of external agents, come a multitude of impressions from the outer world, from the tissues in which these nerves ramify, and from the circulating blood. What is the — 14 — kind of change which is produced when an impression, as of contact, of heat, or of cold, is made on these sensory filaments? The only tenable supposition is, that a wave of molecular disturbance — akin to tha modification in a telegraph wire when a message is sent — is instantly propagated the whole length of the nerve to its central nucleus. In the normal state a nerve apparatus which is the seat of such changes, not inaptly called "isomeric transformations," speed- ily reintegrates itself from the circulating blood, and the disturbance does not exceed the healthy mean; there is no pain. How is it, when from natural or acquired instability of the nerves, there is too much molecular transformation ? Herbert Spencer remarks that " the (peripheral) afferent nerves of individuals who, though otherwise healthy, have lax tissues, are often unduly impressi- ble." Other causes besides " lax tissues " may pro- duce this excess of impressibility. It may accompany vaso-motor weakness and congestion, for local excess of the blood is attended with local exaltation of sen- sibility. We have to note, also, the seemingly anoma- lous fact that local deficiency of blood, as in anaemia, renders the nerves abnormally impressible. Ordinary excitants are capable of producing an extraordinary amount of molecular change. Cold, which is one of the normal excitants, may, by its prolongation or in- tensity, bring about that excessive transformation — i5 — which finds expression in a neuralgic paroxysm.* A mental shock, a physical injury, even a decayed tooth, may start a disturbance in certain nerve branches which, not being repressed by the higher nervous en- ergies — co-ordination being weakened or broken — soon amounts to a riot in the organism; the central sensory centres are fatigued, overcome, charged with the pro- ducts of disintegration, and brought to that state of molecular disorder which constitutes algesia } \ and whose conscious expression is pain. * The modus operandi of cold may be thus explained. "It exerts a depressing influence on the nervous centres in general. The superficial layers of the blood are cooled; this occurs the more easily when the stimulus of chilly air is not sufficiently sharp and sudden to cause a firm contraction of the cutaneous vessels, while the moisture rapidly absorbs the heat of the blood. From this result indirectly various disorders of nut- rition of the deeper-lying tissues or distant organs, and among these, congestion and neuritis of the sensory nerves. 1 ' — (Put- nam:}:). X Pepper's Syst. of Med., vol. v., p. 1219. f A term coined by Yanlair to denote the state of the central nerve cells whose manifestation is pain. According to this writer, there are special groups of cells — not cells of special sensation or general sensibility, — whose function is algesia ; they are set apart for pain and nothing else. It must be confessed that Vanlair gives weighty arguments in support of this view. And yet I cannot believe that there are nerve centres whose sole function is the elaboration of painful sensations. In the healthy, normal state, these cells would have no office, and might be expected to atrophy. More reasonable is the doctrine — i6 — But it will not do to lose sight of the fact that neuralgia may begin centrally as well as peripherally, in a lowered state of nutrition, and in resulting dyn- amic perturbation of the central gray nucleus itself. The pain would be, as it were, projected on the nerves whose nucleus is diseased. Such neuralgias are ex- ceptions. The above conception — instability of the ultimate nerve elements, broken coordination, brings neuralgia into harmony with the other neuroses, epilepsy, hys- teria, chorea, etc. The intermittency of pain is a consequence of the intermittent character of nerve action. " If," says Herbert Spencer, " a nervous disturbance travels as a wave of molecular change; if this wave is such that the molecules of nerve substance fall from one of their that pain is only a modification of common sensibility and is a property of protoplasm under certain conditions of disturbance. Pain is the suffering of the living element wherever that element exists. And yet there must be superadded a factor without which our conception of pain is incomplete; that factor is con- sciousness. It is not known just where consciousness is located — probably its zone occupies the entire cortex cerebri; but just there where the nerves of common sensibility terminate in the conscious zone, is the seat of pain. We do not know enough about the material correlatives of conscious states in general to warrant us in affirming that pain is not a property of cortical cells whose ordinary function, under normal conditions of nutrition and stimulation, is the elaboration of sensations, pleasurable and indifferent, — 17 — isomeric states to the other; then, having fallen, in passing on and increasing the shock, they remain in- capable of doing anything more until they have re- sumed their previous isomeric state." But how may we account for the peculiar charac- ter of neuralgic pains ? The pain of a neuralgic par- oxysm is something different from that of abscess in an otherwise healthy individual, or the pain of pleurisy. The pain of neuralgia may be decomposed into a per- manent pain, and, at certain moments, aggravations of this pain, of the nature of spontaneous recrudescences. Moreover, the neuralgic suffering is attended with painful irradiations into neighboring nerves of the same branch, and subsequently into other nerve trunks and their branches. The explanation must be sought in the constitu- tional state of the subject whose neuro-mechanism is in the peculiar condition of instability and impressi- bility before alluded to, — responding to irritants in a fitful, disorderly, and excessive manner; then, for a brief time becoming exhausted till sufficient material has been assimilated for another series of discharges. The phenomenon of diffusion and irradiation is ac- counted for by the intensity and quantity of the mole- cular motion liberated — waves from one set of nerves being reflected upon other sets of nerves. According to this view, the phenomenon is one of peripheral trans- fer—of simple overflow. Erb, however, has another explanation. In these cases of irradiation, we have to do with a transfer of the excitation from the central — 18 — cells to other cells also central, but corresponding to other nerve branches, and the sensation is referred to the periphery of the latter in virtue of the law of eccen- tricity. But it would seem that this explanation, as well as that before given of peripheral transfer, is not so applicable to painful irradiations as to simple diffus- ion of pain. Perhaps the explanation given by Van- lair may be deemed the most satisfactory. Every nerve of sensation exchanges recurrent filaments with the neighboring branches. In an algesic condition, the recurrent filaments may be spared, if the excita- tion does not exceed a certain degree of intensity. If, however, the excitation becomes too vehement, the cells of the recurrent system of nerves will take on in their turn the algesic state, to become quiet again when the hyper-excitation shall have ceased. A similar use is made of these recurrent filaments in explaining the points douloureaux. These filaments lose themselves suddenly in the tissues surrounding the nerves in the vicinity of a foramen of emergence, subcutaneous tissue, periosteum, neurilemma. If the recurrent filaments become the seat of a neuralgic process, the least pressure exercised on the tissues in question, or even the normal tension of the parenchy- mata or of the blood, will always affect, in an algesic sense, a part of the fibres which form this sort of ter- minal tuft. The impression will be transmitted to the central cells, and these, by virtue of the law of eccen- tricity, will refer the painful sensation to the periphery, to the very point irritated. CHAPTER II. CLASSIFICATION OF THE NEURALGIAS.* The first general division comprehends two great classes; idiopathic and symptomatic neuralgia. Idiopathic or essential neuralgia develops spon- taneously, or under the influence of an excitating cause, but independently of any general morbid state, actual or pre-existent or known organic cause. Symptomatic neuralgia is dependent on the ex- istence of a known organic cause, or general morbid state. Idiopathic neuralgias, from the point of view of their cause, are not susceptible of any division. Symptomatic neuralgias naturally fall under two cate- gories; in the first are placed neuralgias due to the general state (holopathic neuralgias); in the second, those which depend on a localized morbid state. The general morbid state may be: i, inherent in the organism (inherited or acquired) or 2, the result of some poison introduced into the economy. As instances of neuralgias dependent on a gen- eral morbid state apart from ordinary chemical poi- sons, we have gouty, hysterical, syphilitic, diphther- * I have closely followed Vanlair's classification in this chapter. Many of these divisions are destined to be aban- doned as wider knowledge is gained of the organic causes of pain. itic, chlorotic, diabetic neuralgias, those which follow fevers and other acute diseases, and such as super- vene in consequence of the suppression of an habitual discharge. As examples of neuralgia caused by a poison, we have lead (or painters') colic, alcoholic neuralgia, neuralgia from abuse of tobacco, or from mercury. The localized morbid state may be more or less distant from the seat of pain. Sometimes the dis- tance is considerable; here the neuralgia is called sympathetic, or reflex. Lesions directly affecting the nerve itself, or the tissue surrounding it, do not give rise to true neuralgia, but to simple neuralgiform pains, ox pseudo-neuralgia. From the point of view of their seat, whether they be idiopathic or symptomatic, neuralgias are of two kinds: i, neuralgias of the cerebro-spinal system; 2, neuralgias of the ganglionic system. The pain may occupy the nerve trunks or their peripheral extremities (muscles and teguments) or the nerve centres. Hence "we might make another division with three clases, ramicular neuralgias, or common neural- gias, muscular and tegumentary neuralgias, and cen- tral neuralgias. The tegumentary neuralgias are cutaneous or mucous, and the central neuralgias affect the cerebro-spinal axis, or the ganglia of the sympathetic. The visceral neuralgias belong to the latter. 21 TABLEAU OF THE NEURALGIAS (FROM VANLAIR.) A. Ramicu- i. N. Tri- facial. (Proso- palgia.) fN. Ophthalmic j Branch. ■{ I Supra-orbital. Frontal-palpebro- nasal . Bulbar or Ciliary, — dural. lar nerves, or the neuralgias properly so- called. Sup. max- I N. Branch. < Inferior fN. Maxillary | Branch. J 1 Infra-orbital . Superior-dental. Naso-palatine . Anterior auricular. Temporal. Buccal. Lingual. Inferior dental. Mental. a. Facial nerve properly so -called. The seventh pair. 3. Nerves of the Cer- fN. vical Plexus. 1 Occipital. Mastoid . Anterior cervical. Supra-clavicular. - 4. Nerves of Brachial f N. Plexus 1 1 I 5. Diaphragmitic nerves (?) Circumflex. Supra-scapular. Ulnar. Radial. Median. Musculo-cutaneous 6. Dorso-intercostal ( N. Nerves. •< Dorsal. Intercostal. Mammary . 7. Nerves of Lumbar fN. Plexus. i Lumbar. Hypogastric. Ileo-inguinal. Scrotal or labial. Crural. Obturator. 8. Nerves of Sacral f N. Plexus. J I Sciatic. Anal. Perineal. Penile. 9. Nerves of the Coccygeal Plexus (Coccygodi- nia.) 22 TABLEAU OF THE NEURALGIAS (CONTINUED.) B. Muscular nerves, or myalgia. C. Cutaneous nerves, or dermalgia. D. Cemral nerve, jfe-bralgia. "Z'tc Nerves of the Pharynx. Nerves of the CEsophagus. Nerves of the Larynx. Neroes of the Lungs. Nerves of the Heart. Nerves of the Stomach. Nerves of the Intestines. | v j Nerves of the Liver. c> ' Nerves of the Spleen. ^ ° I Nerves of the Kidneys. "- 1 I Nerves of the Bladder. ! Nerves of the Uterus. Nerves of the Ovaries. j Nerves of the Testicle. I Nerves of the Vagina. — 2 3 — TABLEAU OF THE NEURALGIAS, CONTINUED. SECOND CLASS SYMPTOMATIC NEURALGIAS. si' g. 2£ II till td SLS "J g?K Si fti ■•o a (UT3 2* &I8S s o - S«o3 ** a *o • o'^B o 2 2 o S-S b. °S. oW CHAPTER III. THE CAUSES OF NEURALGIA. First among the predisposing causes is heredity. Since Morel and Moreau laid the foundations of the doctrine of hereditary neuroses, all authorities have recognized the influence of the neuropathic predispo- sition in the genesis of neuralgia. The neuralgic sub- ject will be often found to have inherited in the direct family line the particular weakness of nerve organiza- tion which finds expression in the paroxysmal attacks from which he suffers. Nothing, moreover, has been more clearly demon- strated than the fact of the interchangeability of the various neuroses. The victim of neuralgia may have had an hysterical or an epileptic mother, or an insane father or grandfather; the neuropathic tendency was transmitted, and circumstances have determined what neurosis should manifest itself. It would appear, also, that the neurotic tempera- ment is largely akin to the phthisical. Many writers (and especially Anstie) have shown the interchangea- bility of various functional nervous diseases with pul- monary consumption. The neuropathic patient has had a phthisical parent; the child, after suffering for a series of years from some nervous malady — epilepsy, hysteria, neuralgia— ultimately dies of phthises. An- — 25 — stie's tables bring this fact clearly to view; I have myself seen frequent confirmation of it.* As for age, the extremes of life have a relative immunity from neuralgia. Out of 296 cases, Valleix met with but 5 cases of neuralgia in subjects between seventy and eighty years, while there were but 2 cases in children nnder ten years. The maximum of cases (68) was between twenty and thirty. There are, however, more cases in advanced life than statistics appear to show, the number of aged persons in any community being relatively limited as contrasted with that of adults. Anstie affirms that the period of declining life is preeminently the time for severe and intractable neuralgias. Neuralgia in the aged is associated with degenerative changes in the arteries, and general mal-nutrition. The middle period of life is the period of toil and care. Men are absorbed in the pursuit of business and in the support of their families; the rich and the idle are immersed in dissipation, which, no less surely than exhaustive toil, saps the vitality; with women, this is the term of child-bearing, the rearing of fami lies, and household drudgery. Middle age brings with it high resolves, great undertakings, and fierce *See in this connection Chapter III. in Anstie's book on Neuralgia; also Maudsley "On the Pathology of the Mind," p. 87 et seq,\ Blandford, "Lectures on Insanity," chapter on Causation. — 26 — competition; but it also brings with it disappointed hopes, ennui, and weariness — all the moral and physi- cal conditions of nerve-tire and nerve-ache. Sex does not appear to have an important predis- posing influence on the frequency of neuralgia in gen- eral. According to Putnam,* if women show a stronger predisposition than men to certain forms of neuralgia, as to the other neuroses, it is generally conceded that, whereas neuralgias of the fifth and occipital and of the intercostal nerves are met with oftenest amoug them, the brachial, crural and sciatic neuralgias more commonly occur among men. This, he thinks, indicates that the neurosal element is of greater weight in the former group, the neuritic ele- ment in the latter. The sexual periods of life have a recognized influ- ence in the production of neuralgia. The physiologi- cal processes connected with the development of the reproductive organs in the male, with ovulation and menstruation, gestation and puerperality, and the menopause in the female, are attended with the ex- penditure of enormous nutritive and nervous energy, and predispose to neuralgic affections. The prema- ture, excessive, or unnatural exercise of these organs and functions depresses the organism and favors the development of the neuropathic diathesis. * Article A T euralgia in Pepper's System of American Medicine. — 27 — Previous diseases* predispose to neuralgia by the debility and anaemia which they occasion; the same may be said of unhealthy hygienic influences such as bad air, and insufficient food. Cold and damp weather has an influence; neuralgias are more prevalent in this country in the fall and spring months. General disturbances of nutrition, and especially those included under the names anaemia and chlorosis, and all cache- tic, states, such as cancer, tuberculosis, scurvy, dia- betes, may be regarded as important conditions in the etiology of this disease. EXCITING CAUSES. It is not always possible to find for idiopathic neuralgia any exciting cause. Yet generally a minute inquiry will bring out the fact that there had been previous exposure to cold and wet, excessive muscular exertion, inordinate sensorial fatigue, or some moral shock, as the immediate antecedent. Wounds of sen- sory nerves, contusions, gun-shot wounds, punctures, and other injuries, have caused most obstinate and distressing neuralgias. Even comparatively slight in- juries to small sensory nerves, as by venesection, a subcutaneous injection, have resulted in neuralgiform pains or attacks of genuine neuralgia. Erb supposes all these injuries to act "either by occasioning inflam- *I have seen very obstinate neuralgias follow typhoid fever. One very severe case of gastralgia that came under my observation was the sequel of an exhausting accouchement. — 28 — matory changes (neuritis), or by forming tumors on the nerves (traumatic neuromata, amongst which the neuromata following amputation are the most fre- quent causes of severe neuralgia), or lastly, purely mechanically, by pressure and laceration in conse- quence of the retention of foreign bodies in the wound." * • Dr. S. Weir Mitchell, in his book " On Injuries of the Nerves," has narrated many remarkable in- stances of neuralgia starting from gun-shot or other wounds of the nerves, and cases are on record where a fall on a member has developed neuralgia of the sensory nerves of the limb.f Many of these cases do not seem to be true neu- ralgias, in fact, all traumatic neuralgias are classed by some authoTs (as Vanlair) apart, under the head of pseudo-neuralgias. \ These neuralgias have a marked resemblance to ordinary neuralgias; sometimes, how- ever, they are distinguished from the latter by their *Ziemssen's Cyclop., vol. xi, p. 28. f One of the most intractable neuralgias I have ever wit- nessed involved the brachial plexus, and was brought on by a fall on the shoulder in a runaway accident. Considerable atrophy of the muscles of the corresponding limb followed. I have seen, in very sensitive persons, neuralgia succeed a hypo- dermic injection, paroxysmal pain appearing at intervals daily for several days. % Vanlair, Les Nevralgies, leurs formes et leur traitement, 2d ed. (Bruxelles, 1882.) — 2 9 — extraordinary violence and obstinacy. Sometimes the pain is of a burning character, at others, lancinating (stabs or darts); it may remain localized to the region, or may be of a spreading character. Trophic disturbances sooner or later follow, which affect par- ticularly the skin; the red, thin, and shiny skin known as glossy skin, is one of the effects of traumatic neu- ralgias of the extremities. Closely resembling traumatism in its action on nerves, are those diseases of the periosteum and bones which by mechanically irritating and disordering nerves in the neighborhood, occasion neuralgia. The fifth nerve is especially liable to such lesions, having to pass through a long narrow bony canal, any periosteal thickening of which cannot but seriously affect its structural and functional integrity. Syphi- litic ostitis and periostitis have been reckoned among the causes; it is doubtful whether these can cause true neuralgia. Syphilis may produce neu- ralgia by depressing the general health and tone — this disease is, however, much more likely to cause motor affections (as paralysis), than sensory. * That cold, and especially damp cold, is an im- portant factor in the production of neuralgia, no one with much experience in the various forms of this neurosis will dispute. In fact, persons predisposed to neuralgic affections are almost certain to suffer either *Anstie, he. eit. (Am. ed.), p. 175. — 3° — a renewal or an aggravation of their complaints after being chilled. A special chapter will be devoted to the reflex and sympathetic neuralgias which are due to organic causes more or less distant from the seat of pain, and to the toxic neuralgias which result from mal-nutrition of the sensory nerve system by chronic poisoning. Among other causes of neuralgia, must be men- tioned the fatty and atheromatous changes in the tissues and arteries consequent on old age, overwork of body and mind,* and diseases of the central ner- vous system, as hyperemia, inflammation, and tumors of the brain and spinal cord. * Many severe cases of facial neuralgia are caused by eye- strain, as by reading too long, and before too bright a light. CHAPTER IV. PARTICULAR FORMS OF NEURALGIA. I. FACIAL NEURALGIA. This disease has been called prosopalgia, neu- ralgia of the fifth, trigeminal neuralgia, and tic doulou- reux. It is one of the most frequent of neuralgias; this is explained by the relations of its branches to various important organs, the disturbances of which may extend to the nerves supplying them, and by the fact that the face is more exposed than other parts of the body to cold and injurious influences. This affection is generally unilateral. As the fifth nerve divides on emerging from the cranium into three nerve trunks, the ophthalmic, the superior maxillary and the inferior maxillary, any one of these branches may be the seat of the neuralgia. Com- monly, however, it occupies the entire trifacial nerve. As causes, the following have been enumerated: " Cold, decayed teeth, contusions and wounds of the face, compression of the nerves by foreign bodies, neuromata, tumors of the petrous bone, aneurisms of the internal carotid, tumor of the pons, fungus of the dura mater." All the predisposing and exciting causes before enumerated may be factors in the genesis of this neuralgia. Diseases of the nasal and — 32 — frontal sinuses, and fatigue of the eyes, shock and mental emotion, have been occasional causes. The paroxysm may come on suddenly or gradu- ally. It generally begins with a sensation of heat or cold over the affected parts with occasional violent strokes of darting pain, which become more and more frequent till the attack is at its height. Probably no more atrocious suffering is known. " During the attack, the patients utter loud outcries, toss about ontheirbeds and smite theirheads;*the mus- cles of the affected side of the face are often the seat of rapid contraction, — convulsive shocks, which have gived to this disease one of the names by which it is known — tic douloureux. These contractions may be limited to single groups of muscles, as the zygomatics, or the frontal part of the occipito-frontalis. The face becomes turgescent; there is often photophobia, lachrymation, buzzings in the ears; then the par- oxysmal shocks diminish in frequency and intensity, and all becomes calm; the storm has passed, to be re- newed again under the same form in a time not far distant. According to the branches affected, certain phe- nomena present themselves: photophobia, injection of the eyes, lachrymation, transient amaurosis in neural- gia of the ophthalmic, odontalgia, pituitary secretion * " In neuralgias about the head, the patient will often be seen to cringe and recede before the plunges of pain as though, he were receiving blows." Buzzard. — 33 — in neuralgia of the superior maxillary, painful deglu- tition and mastication, exaggerated salivary secretion in neuralgia of the inferior maxillary nerve."* Valleix's painful points are: i, supra-orbital, over supra-orbital foramen; 2, palpebral; 3, nasal (internal and superior part of nose;) 4, ocular; 5, infra-orbital (infra-orbital foramen); 6, molar; 7, superior dental; 8, superior labial; 9, palatine; 10, temporal; 11, tem- poro-maxillary; 13, mental (mental foramen): 14, lingual: 15, inferior labial. Putnam (loc. at., 1232) makes three varieties of facial neuralgia: 1, ordinary facial neuralgia, analo- gous to the neuralgias of the other superficial nerves; 2, intermittent supra-orbital neuralgia, sometimes called brow-ague, though by no means always of malarial origin; 3, epileptiform neuralgia (tic doulou- reux). The first, or ordinary facial neuralgia, is painful and obstinate, though not so serious as tic douloureux. It is often due to decayed teeth, and diseases of the gums or of the alveolar process. The second, or intermittent form, has one variety which bears a certain relationship to migraine, occurs in dis- tinctly neuropathic individuals and families, and in attacks of about the same duration and periodicitv of occurrence. Another variety is characterized by a daily seizure which occurs with absolute regularity, coming on usually about nine in the morning, and * Vide " Clinical Therapeutics,'" p. 76 (foot note). 3 MM — 34 — increasing in severity for an hour or so, then persist- ing unchanged till midday or later, when it gradually diminishes, finally disappearing in the course of the afternoon. As a rule, Putnam says, is is brought on by catarrh of the frontal sinuses, often following an acute attack of coryza. This form is greatly con- trolled by quinine (15, 20 to 25, and even 30 grains) four hours before the attack. The epileptiform vari- ety (tic douloureux) is characterized by the sudden- ness of its onset, and the severity of its paroxysmal pain. The path pursued by the darts of pain is gen- erally in the direction of the nerve-tracks. According to Putnam's view above given, the name tic doulour- eux is only applicable to the disease when it appears in its more painful character. Treatment. — Only the surgical treatment will be here mentioned. The medicinal treatment will be dis- cussed in the chapter devoted to general therapeutics. In 185 1 Dr. J. M. Carnochan operated in the first case for complete resection of the second branch of the fifth pair from the foramen rotundum to the infra- orbital foramen — with the removal of Meckel's gan- glion — w ith complete success. Simple subcutaneous section of the infra-orbital nerve in the cheek had been often done before that time, but with no very encouraging results; in fact, the relief coming from the operation was very temporary. The operation is a bold one, and involves trephin- ing the antrum. — 35 — Dr. Robert Abbe, of New York, has lately pub- lished in the New York Medical Journal reports of a series of cases in which he has performed Carnochan's operation with brilliant success.* II. MIGRAINE, ITS PATHOLOGY AND TREATMENT. f According to Anstie, migraine (hemicrania) is a variety of neuralgia of the ophthalmic division of the fifth nerve. He remarks that the attacks of migraine often interchange with neuralgia seizures; that they often begin with pain distinctly located in the supra- orbital nerve, as the result of exposure to cold or other of the causes of ordinary neuralgia. This view is favored by Senkler in " Pepper's System of Medi- cine." Romberg regarded migraine as a neuralgia of the cerebrum, but Hesse observes that the symptoms of this neurosis are equally compatible with its location in the branches of the fifth distributed to the meninges and bones of the cranium. There is, however, much to be said in defence of the view that migraine is primarily a neurosis of the sympathetic nerve. According to Du Bois-Reymond, the phenomena of migraine are best explained by the * Vide New York Medical Journal, Aug. 3d, 1889. f In this section, as in one or two other instances {vide angina pectoris), the writer has availed himself of articles of his own which have appeared in the Boston Medical and Surgical Journal and Medical Age. - 36 - supposition that there is abnormal excitation of the sympathetic on the affected side, and he emphasizes in this connection the retraction of the temporal artery, the pallor of the countenance, the dilatation of the pupil; all of which are due to tonic contraction of the vascular and oculo-pupillary muscles. But, as Jaccoud remarks, the constancy of these phenomena has not been established, and Moellendorff afterwards maintained a directly contrary view, to wit, that the symptoms of hemicrania depend on the unilat- eral relaxation of the vessels of the head, from want of energy of the vaso-motor nerves. Eulenburg* adopts an intermediate theory, affirming that a certain class of cases is undoubtedly vaso-motor in its origin. He describes two types of migraine: the sympathetico- tonic or angio-spastic, and the angio-paralytic or neuro-paralytic forms. In the one, the face is pale and sunken; in the other, it is hot, turgid and flushed during the height of the attack. In the one, the pupil is dilated and the temporal artery appears as a hard cord; in the other, the pupil is contracted, and the temporal artery is swollen and throbs with increased force. In the one, the eyes are pale and sunken; in the other, they are suffused and prominent. Jaccoud reconciles the pathological differences above mentioned by assuming that tnere cannot be two vascular conditions so contradictory, as the sub- *Ziemssen's Cyclop. Art. Hemicrania. — 37 — stratum of migraine. If, he says, clinicians have wit- nessed opposite phenomena, it is simply because they observed at different periods; in other words, the paroxysm of migraine is constituted by an abnormal excitation of the sympathetic followed by a paralysis by exhaustion, which marks the decline and the ter- mination of the paroxysm. The contraction of the vessels during the onset and the active period of the attack explains why the pain is exaggerated at each pulsation of the artery; as for the origin of this pain, it may be attributed to the vascular cramp itself, which compresses the nerve filaments contained in the un- striped muscles.* Hemicrania is a disease from which no station or condition of life is exempt. Rich and poor, the man of ease and the fashionable lady, the mill-operative and the kitchen drudge, are alike subject to migraine. Among the factors in its production, hereditary pre- dispostion is the most potent. The disease follows the female line, being usually inherited from the mother only, and by the daughters only (Eulenburg). When there is a strong hereditary tendency, girls of quite a young age may be attacked by migraine, Eulenburg has known girls of four or five years to be sufferers. In half the women affected with migraine, the at- tacks occur at the menstrual period or immediately * Jaccoud: Path. Interne, t. i, p. 478. - 38 - after. In other cases, the attacks are due to mental excitement, after attendance at a party, at a theatre, etc. Sometimes the attack is provoked by reading and study; some persons have hemicrania from read- ing by artificial light. The attacks sometimes appear to originate in indigestion. It is in this form of neuralgia that the recently discovered analgesics, antipyrin, acetanilide, phena- cetin, exalgin, seem to do the most good. Here the triumph of guarana and caffein is often seen. When the attack can be traced to the stomach, ipecac- uanha in one-fourth grain doses every hour has been commended, also rhubarb and soda, or some of the effervescing aperients. In the angio-spastic variety, nitrite of amyl in- halations, and nitro-glycerin by mouth, have been beneficial. In the angio-paralytic form, ergot has been found useful. Senkler speaks favorably of bromide of lithium, fifteen grains every hour for two or three doses. The effervescent bromide of caffein, or bromo-pyrin, is a good preparation. Seguin's favorite treatment is cannabis indica, one-fourth grain doses of the alco- holic extract three times a day, to be continued for weeks and even months. Aconitia (one two-hun- dredth grain) and gelsemium have been praised; the former is, perhaps, one of the most certain remedies in the angio-spastic variety. Malarious forms are speedily benefited by large doses of quinine. Always, — 39 — as prophylactic treatment, arsenic and cod-liver oil are indicated. Anstie and Eulenburg think well of galvanism to the head and sympathetic. Firm pressure on the head and compression of the carotids sometimes give relief; the same may be said of sinapisms to the nape of the neck, and the application of a hot-water bag to the back of the head. After all, resort must sometimes be had to hypo- dermic morphia in the atrocious suffering of mi- graine. Migraine, says Lasegue (Etudes Medicales, vol. II., p. 331), is a disease of paroxysms; a man who suffers from con- tinuous headache is not migrainous. The attacks do not repeat themselves at periods that can be mathemetically calculated. * * * * * Ordinarily, the attacks do not recur oftener than once a week. On the other hand, he who has only one or two attacks a year, cannot be said to be a victim of true migraine. * * * . The duration of the attack also obeys positive laws. Any attack of cephalalgia which lasts less than six hours and more than forty-eight hours, cannot properly be called migraine. Typical migraine appears in the morning. Afier certain pro- dromes; physical and mental atony with diminution of appetite, pallor, fatigue, the headache begins with a diffused sensation of cranial tension, sometimes by a pain in one spot, which spreads over the cranium and face of the affected side, never limiting itself to a nerve tract. Topographically, migraine is hemicranial, occipital, syn- cipital, or diffuse; in the first case it has its maximum of inten- sity in the orbit, in the infra-orbital and temporal regions, never fixing itself below the infra-orbital line; at the most there — 4© — is a vague sensation of weight and swelling of the face and a little aching of the teeth. The occipital form is the most pain- ful, and is rarely hemicranial; the syncipital, never. Migraine is exceptionally diffuse at first; starting from one or more points, it spreads with rapidity to the entire cran- ial surface, without having everywhere an equal intensity. Pa- tients affirm that the skin seems to be detached, as though they were being scalped. Sometimes, however, the integument seems to adhere to the skull by a violent retraction; the patients complain of being tortured by a leaden cap, or by an iron band. Intolerable as the pain is, it is rather contunding than lancina- ting, and seems to the patient rather extra than intra cranial. In proportion as the paroxysm advances towards its acme, the sufferings become ordinarily more confused, proba- bly by reason of the general malaise which becomes more pro- nounced; sometimes, however, the pains change their place, redoubling their intensity. This sudden migration of the pain during the attack is a remarkable fact which differentiates mi- graine from the ordinary neuralgias; sometimes, for instance, the pain suddenly shifts from the left to the right side, or vice versa. To the pericranial sufferings are soon conjoined certain ailments connected with the stomach which have given to mi- graine one of its names, sick-headache. There is nausea, retching, and vomiting during the attack; these symptoms pre- dominate in the stationary period and then sometimes cut short the attack, though at the onset vomiting does not relieve. It may be affirmed that no attack of headache not accom- panied by gastric complications is true migraine. In the third period the violent pain is decreased, and the nausea much less pronounced. The head becomes heavy; it seems at times as if it were enormously swollen; the pain through the eyes is more pronounced, though vision may be unaffected. The first manifestations of a cerebral kind are in- — 41 — tellectual torpor with absence of ideas, or a sub-delirium similar to that of dreams, though the patient can still control himself. The necessity of sleep is now felt, and the patient . gladly yields to it; a delicious slumber closes the attack; the patient wakes with a feeling of prostration, though free from pain; he is not himself again until he has taken food. If the attack, when left to itself and pursuing its course in silence and darkness — the favorite environment of the mi- grainous — accomplishes thus its regular evolution, it may be suddenly interrupted by adventitious modifying circumstances. Many a sufferer from migraine has experienced sudden deliv- erance from his attack under the influence of a strong emotion, a fright, or a piece of unexpected good news. [It may be added that the same effect may be produced by full doses of some of the modern analgesics, and especially anti- pyrine, phenacetin, and caffeine.] III. CERVICO-OCCIPITAL NEURALGIA. This is an uncommon form of neuralgia, affecting the sensory nerves of the occipital region, neck and nape of the neck; the pain is located in the first four cervical nerves. The causes do not differ from those which pro- duce facial neuralgia. According to the observations of Valleix, this form of neuralgia is most generally due to prolonged exposure to cold, as sitting in a draught. Neuritis and congestion of the neurilemma are suggested as probable causes. Diseases of the vertebrae also appear to induce this form of neuralgia, by pressing on the veins as they pass out of the verte- bral canal, and swollen lymphatic glands deep in the — 42 — neck by pressing on the cervical plexus and occipitalis major (Niemeyer). There are painful points over the first two verte- brae, at the point of exit of the great occipital nerve from the complexus, over the mastoid process, near the parietal protuberance, and in the auricle. As the tendency of this neuralgia is to spread to the lower part of the face, it sometimes becomes, as Valleix observes, indistinguishable from neuralgias of the third division of the trigeminus. In the treatment of this affection, neurotomy has been tried, but with only partial success. Anstie has derived marked benefit from blistering. IV. CERVICO-BRACHIAL NEURALGIA. By cervico- brachial neuralgia is meant neuralgia having its seat in the four lower cervical vertebrae and in the first dorsal (the brachial plexus). These are neuralgias of the shoulder, arm, forearm, and hand, and they are often very severe and obstinate. The causes are oftener extrinsic (from material lesion) than in any other form of neuralgia. Injuries of the brachial plexus by cutting instruments, gun- shot wounds, contusions, neuromata, swollen lym- phatic glands, or aneurismal tumors in the axilla, peri- ostitis, tubercle or cancer of the vertebrae causing pressure on the nerves at their foramen of emergence, have been enumerated as perceptible causes. Attacks of this neuralgia have been referred to immoderate — 43 — exercise of the muscles of the forearm and hand, as in playing on the piano, in sewing, and in knitting. The pain is paroxysmal, of regular or irregular type, and is characterized by lancinations in various directions, which make themselves felt especially in the terminal expansion of the nerves. The most common seat of cervico-brachial neuralgia, according to Anstie, is the ulnar nerve, though the pain, when intense, always spreads to the other sensory nerves of the brachial plexus. In a very obstinate case to which I have before referred, the principal focus of the pain was the shoulder. In another case, of which I have notes, the neu- ralgia was brought on by a contusion (a fall from a carriage). For thirteen years, this patient (an elderly lady) was a sufferer from neuralgia, affecting chiefly the ulnar nerve, the inner part of the forearm and little and ring fingers being chiefly affected. During the severe paroxysms of pain (which were frequent) the fingers were contractured in a semi-flexed condi- tion. The forearm and hand were permanently swollen and somewhat livid, the outer fingers were often numb and cold. Prickly sensations were com- mon. During the painful crises, all the sensory nerves of the fingers seemed affected; the pain being principally in the terminal extremities of the nerves. During the intervals of the attacks, there was always an aching pain along the ulnar side of the forearm. In damp, chilly weather, the attacks were generally worse. — 44 — This case seemed to me to be a fairly typical one. Antipyrine in 10 grain doses, arsenic, iron, cod- liver oil, and opiates were all tried in this case. Anti- pyrine gave much relief the last two years of this pa- tient's life, and frequently stayed the paroxysms, but morphine was often necessary. A proprietary pre- paration of opium called svapnia in \ grain doses was resorted to with benefit at times, and seemed to have less baneful after-effects than morphine. In cervico-brachial neuralgia, neurectomy of the affected nerve has sometimes been followed by a per- manent cure. V. INTERCOSTAL NEURALGIA. Intercostal neuralgia is neuralgia affecting the sensory branches of the dorsal nerves. These nerves — twelve in number — divide after their emergence from the intervertebral foramen, into an anterior and a posterior branch; the anterior cords are the inter- costal nerves, the posterior branches are distributed to the muscles and skin of the back. The intercostal nerves run along in the inter- costal space, at first resting on the external intercostal muscles, then lying between the muscles; beyond the middle of the rib they enter the substance of the in- ternal intercostal muscle, and reach the inner surface, being in contact with the pleura; at the anterior ex- tremity of the intercostal space they pierce the mus- cles and are distributed to the integument. Midway — 45 — between the vertebral column and sternum, each intercostal nerve gives off a lateral cutaneous branch, which pierces the external intercostal muscle and divides into twigs for the supply of the skin of the side of the thorax. The six lower intercostal nerves con- stitute the anterior cutaneous nerves of the abdomen. The points douloureux are three in number: one posterior, by the side of the spinous processes, over the point of emergence of the nerves; one median, over the point where the lateral cutaneous branch perforates the muscles; an anterior, situated a little outside the sternum, or at the epigastrium, ex- ternally to the median line at the origin of the ante- rior perforating branch. These circumscribed spots are generally very sensitive to touch or pressure. Intercostal neuralgia is generally unilateral and seated on the left side. It is more common in females than in males, and generally affects several of the intercostal nerves at the same time. The causes are multiple: impression of cold; contusion of the thorax; neuritis; neuroma; lesion of neighboring organs, as the lungs, pleura, and ver- tebral column; congestion and dilatation of the intra- vertebral venous plexuses or intercostal veins. Inter- costal neuralgia is a very frequent, though not con- stant, accompaniment of herpes zoster, and has been known in a very obstinate form to follow attacks of pleurisy. It may be reflex, and accompany catarrh of the digestive tube and diseases of the uterus or - 46 - ovaries. It is observed in hysteria, chlorosis, anaemia, malaria, lead poisoning, syphilis, and rheumatism. Michel Peter defines the pain of pneumonia as a pleuritic pain, and regards the latter as an intercostal neuralgia.* Dujardin-Beaumetz regards the pains in the side observed in phthisical patients at the apex of the lungs as neuritis from inflammation of the lungs and pleura. In tuberculous neuritis it is the first, second, and. sometimes third intercostal spaces that are the seat of the pain. In anaemic neuralgias it is the fourth, fifth, and sometimes sixth intercostal spaces on the left side, and the pain is most severe on a level with the fourth dorsal vertebra. Continuous pain is the predominant symptomatic element, presenting itself under the form of a con- strictive tension half girdling the thorax and exagger- ated by movements, especially those of respiration (Jaccoud). Along with this dull continuous pain, there are shootings along the course of the intercostal nerves. Real paroxysmal accessions are less common than in other forms of neuralgia, yet they now and then occur. Double intercostal neuralgia (which is very rare) would, according to Jaccoud, lead one to suspect the existence of an intra-thoracic tumor, or a chronic dis- ease of the spinal cord or its membranes. * Clinical Therapeutics, p. 74. — 47 — Intercostal neuralgia is liable to be confounded with pleurodynia or rheumatism of the thoracic mus- cles. In the latter affection the pain is more diffused than in intercostal neuralgia, is seated in certain mus- cles, is aggravated by certain movements, and gets well in a few days; moreover, there is absence of the painful points. With regard to the treatment, the general prin- ciples laid down in a subsequent chapter are here ap- plicable. All authorities speak favorably of counter irritation to the skin; Valleix and Erb especially com- mend flying blisters, applied in succession over the painful points. Erlenmeyer recommends repeated cauterization of the skin with nitrate of silver. Fara- dization with the metallic brush has seemed some- times to do good. In one bad case that came under my observation, firm pressure over the painful foci with the bare hand gave great relief during the at- tacks. Chloroform and menthol liniments and the local application of cocaine solutions confer but little benefit. Hypodermic injections of chloroform or antipyrine may be tried; these failing, the resort, as usual, must be to morphine, by mouth or subcutane- ously. VI. MASTODYNIA IRRITABLE BREAST. Women about the period of puberty or from then to the thirtieth year, often, without any perceptible cause, become sensitive to the slightest touch at one - 4 8 - or more points over the mammary gland. Severe pain like tic douloureux, occasionally shoots out to- ward the shoulder, axilla, or hip. The disease sometimes develops in connection with pregnancy or lactation. Now and then smalt neuromata or painful tumors of the nerves of the mammary glands appear to be the starting points of the neuralgia; these consist of connective tissue, not of glandular substance. Mastodynia is sometimes very obstinate. Cooper recommends a belladonna plaster; Romberg, pills of ext. conii, ext. papaver (aa gr. ij), ext. stramonii (£ to i gr.), to be taken according to indications. VII. LUMBO-ABDOMINAL NEURALGIA. Neuralgia of the lumbar plexus is generally situ- ated on the left side. Its causes are various: impres- sion of cold, contusion, alteration or compression of nerves by bony tumors or other tumors in the vicinity. It may be provoked by a mordid state of the genital organs, testicle, uterus, and its annexes, and co-exist with neuralgia of the neck of the womb. It may oc- cupy all the branches of the plexus, or several of them, or each of the following branches: i. The abdominal branches which furnish the ilio-scrotal nerve; 2. The internal inguinal branches; 3. The external branch which furnishes the scrotal or labial nerves. The pain, as in all other neuralgias, is permanent^ dull, or contusive, or is paroxysmal. The attacks are — 49 — spontaneous, or provoked by walking, sudden move- ments, pressure over the nerve, etc., and remain limited to the bones, the flank, and the inferior part of the hypogastrium, or are propagated to the groin or the testicle, or labia majora, according as the scrotal, testicular, labial branch, etc, is affected. Irritable testicle, according to Sir Astley Cooper, is ileo-scrotal neuralgia.* The treatment does not differ essentially from that of dorso-intercostal neuralgia. Coccydynia. — This is neuralgic pain having its seat in the region of the coccyx. Women are more subject to it than men. It is felt particularly in sitting and during defecation. Buzzard regards it as neural- gia of the coccygeal plexus. The treatment consists either in subcutaneous division of the muscles and fibrous structures attached to the coccyx, or in extirpa- tion of the coccyx. f VIII. NEURALGIA OF THE SCIATIC NERVE. Neuralgia may attack any of the sensory branches of the sacral plexus, and the term sciatica is often used to designate neuralgia of that plexus. Want of space obliges me to restrict the signification of the word (in accordance with its common acceptation) to neuralgia of the great sciatic nerve. * Reprinted from Clinical Therapeutics, note 3, p. 73, f Art, Neuralgia in Quain's Dictionary of Medicine \ 4 MM — 5° — Cotugno, an Italian physician, more than a cen- tury and a quarter ago, gave the first magisterial description of sciatica; his pathology has been out- grown, for he attributed the disease, in great part, to dropsy of the nerve sheath, and compression of the nerve substance. Valleix at a later day, relegated sciatica to the rank of functional neuroses under the name oifemoro- popliteal neuralgia. The search for points dou/oureux, as usual, pre- occupies Valleix. His painful points are as follows: i. A lumbar point immediately above the sacrum; 2. A sacro-iliac point on a level with the sacro-iliac articulation, in front of the posterior superior spine of the ilium; 3. Iliac, over the crest of the ilium; 4. Gluteal, at the top of the great sciatic notch; 5. Trochanteric, upper border of the great trochanter; 6. Femoral points superior, middle, and inferior, over the origin of the principal nerves given off from the sciatic; 7. Popliteal, over the popliteal space; 8. Patellar, over the patella; 9. Peroneo-tibial, over the upper articulation of the tibia and fibula; 10. Pero- neal, about the neck of the fibula; it. Malleolar, at the posterior and inferior part of the external malleo- lus; 12. Dorsum of the foot and plantar region. In other words, according to Valleix, sciatica obeys the law according to which the pains are con- centrated: 1, at the point of emergence of the nerve trunk; 2, in the points where a nerve filament traverses — 5i — the muscle to approach the skin to which it is dis- tributed; 3, in the points where the terminal branches lose themselves in the teguments.* Lasegue has pointed out that Valleix, in calling attention to pain and especially paroxysmal pain, as the principal dis- tinguishing element, and overlooking the fact of a morbid organic process with its periods, its acuteness, and its chronicity, has given a picture which is little in accordance with clinical facts as they ordinarily present themselves to the practitioner. He regards sciatica as an organic disease, due to neuritis, or some degenerative alteration of the nerve. It cannot however, be said that the relatively few post-mortem examinations that have been made of sciatic patients have revealed that constancy of morbid changes which would bear out Lasegue's view. Erb regards the anatomical changes as simply accidental accompaniments of the disease. It is, however, true that in the experience of many practitioners, as in that of Lasegue, \ the disease has not been so much char- acterized by lancinating, ingravescent pangs, as by a constant dull pain aggravated by pressure and motion seated in some part of the nerve trunk. Causes. — Anstie regards senility as a predisposing cause, and Gueneau de MussyJ looks upon sciatica as *See some very judicious remarks on this subject in Lasegue, Etudes Medicates, p. 310. f Lasegue, Etudes Medicales, Vol. II. Art. Sciatica. % Gueneau de Mussy Clinique Medicale, t. i., p. 306. — 52 — a manifestation of a rheumatic or arthritic diathesis. The great length and superficial position of the sciatic nerve renders it peculiarly liable to inflammation from cold and to injuries.* Among the accidental causes are exposure to cold, and especially damp cold, wounds, contusions, neuritis, fractures, the presence of abdominal, pelvic, stercoral tumors, pressure of the fcetal head during accouchment, etc. Erb regards mechanical pressure by sitting on hard, uncomfortable seats as a frequent cause. Excessive walking and occupations requiring prolonged standing certainly sometimes seem to favor if not directly cause sciatica, and I have seen one ob- stinate case accompany diabetes as a part of the de- cadence and mal-nutrition resulting from that disease. The disease is oftener seen in robust and hard- working men than in delicate nervous persons, is more frequent in middle life than at any" other epoch, and in males than in females. According to Erb's observations, the proportion of males to females is as 4 to i. Symptoms. — The disease generally announces itself by a feeling of numbness, tingling, cold or heat in the entire limb, or in certain limited parts; then, after a variable time, there is an outbreak of pain which may occupy different branches of the nerves * Erb in Ziemssen's Cyclopaedia. — 53 — (genito-crural, cutaneous femoral branches of the lesser sciatic, articular branches of the great sciatic and peroneal, internal saphenous, short saphenous or posterial tibial, or terminal plantar nerves). As in the other neuralgias, the pain may be looked upon as double; there is a continuous element, a deep, contu- sive pain, and a paroxysmal element, manifesting itself by ascending, descending, or irregular lancina- tions*. " Under the influence of walking, muscular exer- tion, heat, or without any known cause, lancinating pangs, are experienced radiating along the course of the nerve; the patient can often mark out with his finger the track of the painful nerve. These pains are exasperated by pressure and by movement. The patient instinctively seeks repose and avoids all mus- cular contractions, lying on the opposite side from the pain. In some cases the patients feel in the bones and joints a sort of a deep and piercing pain, which, according to Jaccoud, indicates an intra-vertebral origin of the neuralgia. When there are, moreover, alterations of sensibility, consisting in formications, tingling, aching sensations in the back, the neuralgia has for its origin a lesion of the cord or meninges acting on the posterior columns. Apart from the attack some patients suffer little and are able to work. Others become incapacitated, * Jaccoud, Path. Interne, t. I, p. 502. — 54 — walk with difficulty, limping, or even are compelled to cease walking altogether. Besides these pains, disorders of the cutaneous sensibility have been noted, and Hubert Valleroux de- scribes sensory troubles (pertaining to tactile sensibil- ity, sensibility to temperature, etc.), especially occu- pying the posterior region of the thigh, or four or five fingers' breadth below the popliteal space; atrophy of the affected member has been noted; a slow, muscular atrophy in the pure neuralgias, a more early atrophy in the neurites. Some writers have observed changes in the temperature and in the color of the skin, erythema, furunculi, patches of herpes along the tract of the nerve. Sciatica has a very irregular march. It may cease spontaneously and periodically; its duration is very variable, from several days or weeks to years. Re- lapses are frequent."* Treatment. — The general principles of treatment applicable to the other neuralgias are applicable to sciatica. Of the new methods of treatment, the chloride of methyl spray is perhaps the most noted. A peculiar apparatus is needed to carry out this treatment, which is attended with congelation, smarting and burning, but afterwards with marvellous relief. Dujardin- Beaumetz says that in real sciatica he has generally Reprinted from "Clinical Therapeutics." - 55 — found the pain to cease after one or two applications of chloride of methyl spray. (See the subject treated fully in New Medications, published by G. S. Davis, Detroit, page 285.) The ether spray, directed over the affected nerve or nerves, gave great relief to one of my patients in his atrocious paroxysms. Cotugno was the first to propose cantharides blisters, and all subsequent authorities have spoken well of them. The blisters should be of the size of the palm of the hand, and applied at intervals of two or three days over the painful regions. Anstie recom- mends blistering to the sacrum — the blisters may be dressed with some simple ointment and healed, then put on again. The actual cautery has been recommended by Valleix, Jobert, and others — light, superficial, " trans- current " cauterization being employed. Faradization by the electric brush has had its advocates. Erb has seen brilliant cures from galvan- ism of the affected nerve — the anode being placed upon the sciatic foramen, or sacrum, and the cathode upon the specially painful parts. Among specific remedies, oil of turpentine has been extolled; oil of turpentine, 3 j, honey, |j; a tablespoonful twice daily. Neurotomy and nerve-stretching have not given very satisfactory results; neurotomy is not to be rec- ommended except when the pain is confined to a small branch. -56 - But almost always the resort must be had, sooner or later, to chloroform injections, antipyrin injections, or to narcotics. The deep injection of chloroform into the substance of the gluteal muscle over the nerve, is Bartholow's method; (see Appendix, page 116). Antipyrin may also be used to advantage hypo- dermically (see also Appendix, article "Antipyrin"). Opium may be used in the form of enema; 30 drops of laudanum to 2 ounces of thin starch, the injection to be retained. Generally the narcotic will be more speedy and effectual if employed in the form of mor- phine injections subcutaneously administered (for di- rections, see Appendix, article " Opium "). Hammond gives instances where the hypodermic of morphine was given every day for three or four months. This treatment would be quite certain to make a morphio- maniac of the patient. Doubtless, in the congestive attacks produced by cold, revulsion by irritant liniments (menthol, turpen- tine, etc.) and vesicants do the most good, while in the purely rheumatic form benefit may be expected from a prolonged course of iodide of potassium. CHAPTER V. VISCERAL NEURALGIAS. The internal organs are mainly supplied with nerves from the great sympathetic. Although the ganglionic nerves are sensory as well as motor, yet the sensibility of the sympathetic system differs in many respects from that of the cerebro-spinal system. In the normal functionment of organs innervated by the sympathetic, there is little sensibility and never pain. We are not, for instance, in health cognizant of the state of our digestive tube during digestion; the changes which the food is undergoing do not enter as an element into our consciousness, unless, it may be, in contributing to a massive, vague, indefin- able sensation of bien-etre, called by Maudsley, cosn- cesthesis* In pathological states, however, the sen- sory elements of the sympathetic declare their exist- ence by vague impressions of discomfort, if not by actual pain. Pain of a severe kind is experienced in gastric cancer as well as in gastralgia, in enteritis, etc., and the uterus, which in the normal state is insensi- tive, in various morbid conditions may be the seat of severe pain. * "The general feeling of well being which results from a healthy condition of all the organs of the body * * * is known as the ccencesthesis ." Maudsley, Physiology and Path- ology of the Mind, page 135. -5« - In neuralgia of the viscera, the pain is deep seated, sometimes a dull, heavy ache, sometimes of a boring character, rarely lancinating. " It does not dart, like the pain of superficial neuralgia, but is either constant or comes in waves which steadily swell to a maximum and then die away, often leaving the patient in a state of profound temporary prostra- tion " (Putnam).* The pain is generally diffused, and there are no definite points douloureux although the organ may be tender to touch. In severe attacks there are painful irradiations, as in the superficial neuralgias. Pressure generally relieves the pain, it never provokes an at- tack. General disorders like those that attend the neu- ralgias of the cerebro-spinal system accompany the visceral neuralgias, in virtue of the law that one part cannot suffer without entailing suffering on the whole. Besides the loss of appetite and the decadence in the nutritive functions with consequent emaciation, there are reflex disturbances which are often of a serious nature; witness the nausea, vomiting, indigestion, con- stipation, which attend uterine or ovarian neuralgia. The functions of the organ which is the seat of the neuralgia are also more or less disturbed or interrup- ted; thus, in gastralgia, digestion is suspended, and food, if taken, provokes vomiting. * Pepper's Syst. American Medicine, Vol. v, page 1215. — 59 — It is needless to say that the causes of visceralgia are the same as those which produce neuralgias of the cerebro-spinal system, and that neuralgias of the sympathetic are often interchangeable with the super- ficial neuralgias which occur in states of anaemia and prostration, in persons of a neuralgic habit, etc. Uterine and Ovarian Neuralgia. — It is now gen- erally conceded that the uterus is sometimes the seat of a suffering which is essentially neuralgic. There is, for instance, a form of dysmenorrhea called, by common consent, neuralgic. The pain is independ- ent of all organic disease; it is not due to any ob- struction to menstruation, but attends the monthly function on account of an exaggerated irritability of the ovaries. The pain manifests itself before or after the beginning of menstruation, and may cease when the flow becomes established, or may continue through the period.* In some patients the whole period is one of in- tense suffering; commencing 'with sharp, darting, lancinating pain in the uterus and vagina, and extend- ing down the thighs. There is often severe reflex pain in one or both breasts. Hysteralgia is sometimes coincident with neural- gic affections of the cerebro-spinal nerves, sometimes it takes the place of the latter; it is apt to occur in persons of the neuralgic disposition. *Jenks, Diseases of Menstruation, Detroit, 1887. — 6o — Anstie speaks of a class of cases, which, I believe, are sufficiently common in the experience of physi- cians, where the affection " appears to be a severe ovarian neuralgia, attended with a vaso-motor par- alysis which causes great engorgement of the ovary and consequent difficulty of ovulation."* He also believes that peri-uterine neuralgia is often due to peripheral irritation, arising from such sources as the following: Ascarides in the rectum; profuse and irritable leucorrhoea; calculus in the kidney and ureter; prolapsus uteri; tumors in the uterus or its appendages; ulcer of the cervix; large masses of scybalous faeces in the rectum, etc. Treatment. — In the endeavor to alleviate uterine neuralgia, the general principles of treatment to be hereafter set forth are applicable. A fortifying regi- men is to be insisted upon, of which exercise in the open air is an essential part. All delicate females are the better for judicious gymnastic training. Hydro- therapy properly administered is a powerful adjuvant to the treatment. Some cases of neuralgic dysmen- orrhea are cured by marriage. The diathesis should be kept in view; anaemic and chlorotic patients require iron, arsenic, strychnia, and all the elements of the haematic and tonic regi- men. Rheumatic cases demand salcl, iodide of potassium, and especially guaiacum. Dewey's ammo- * Anstie, on Neuralgia, Etc.; Am. ed ; p. 72. — 6i — niated tincture has had considerable repute in rheu- matic dysmenorrhea. Jenks* speaks favorably of electricity; a mild galvanic current down the spinal column for ten min- utes, and a strong current through the pelvis; the whole sitting not to exceed twenty-five minutes. Among the external remedial agencies, revulsive applications to the os and cervix with the Paquelin cautery, or the acid nitrate of mercury have the en- dorsement of Dujardin-Beaumetz.f Narcotics will often be required where simpler remedies fail to relieve the pain, and here supposi- tories of opium, morphine, belladonna, will render good service. Jenks gives several formulae in his useful little book on the Disorders of Menstruation, which belongs to the series of 1887. The morphine suppository of the U. S. Ph. has proved useful in my practice. Lavements of thin starch and laudanum have also promptly relieved the pain. Of late, antipyrin, by mouth, hypodermic injec- tion, or lavement, has been attended with excellent results. Germain See especially recommends the ad- ministration by lavement. The following formula may be employed : Antipyrin, 3 i; starch, § ij. M. For one injection, which should be retained. Jenks speaks well of cimicifuga racemosa, begun * Loc. cit., p. 60. f Clinical Therapeutics, Detroit ed., page 73. — 62 — two or three days before the flow, and continued at brief intervals through the entire period. The dose would be half a fluid drachm to a drachm every four or six hours. The tincture of Pulsatilla in three- drop doses every two hours while the pain lasts has been highly recommended. The fluid extract of black haw (viburnum pruni- folium) in teaspoonful doses every four hours has achieved good results in neuralgic dysmenorrhea. The liquor sedans of P., D. & Co. has viburnum pruni- folium along with Jamaica dogwood and hydrastis Canadensis. Neuralgias of the bladder, urethra, testicle, and spermatic cord, have been observed. A neuralgia of the liver, under the name of hepatalgia, has also been described. A more common form is neuralgia of the stomach, known as: — Gastralgia, or gastrodynia. — This is a very painful affection, met with in persons of a delicate, neuro- pathic temperament. It is often associated with anaemia, sometimes with hysteria. In other cases, arthritis is the underlying element. One very severe case which came under my observation attended over- work and lactation in a patient who had been a suf- ferer from neuralgia. It is probable that gastralgia is a neuralgia of the pneumogastric nerve, as the stomach is supplied with sensory as well as motor fibres from that nerve. The special characteristics of true neuralgic pain - 63 — in the abdominal pneumogastric nerve, are: (i) It comes on in states of exhaustion; (2) unlike dyspep- tic pains, it is relieved by food; (3) it is also relieved by stimulants, as brandy and water, thus resembling colic; (4) it is diminished by pressure, which aggra- vates most pains dependent on local organic mischief (Anstie). " The most severe example of gastralgia which I have ever seen," says Anstie, "was entirely unaccompanied by dyspepsia; this patient absolutely attempted suicide to escape from his agonizing pains, which recurred with the greatest frequency and obstinacy, but were at last entirely removed by strychnia." Although gastralgia is not dependent on dyspep- sia, it is sometimes provoked by food, even of a bland and digestible character, just as neuralgic attacks of the peripheral nerves are frequently provoked by ordinary stimuli. One marked instance of this kind has come under my observation, which was in this sense an exception to the rule as laid down by An- stie.* Treatment. — Causal indications, as far as possi- ble, must be attended to; anaemia and chlorosis de- mand the appropriate remedial agents. Leubef * Mrs. A. , living in Beck street, Newburyport, for weeks a sufferer from typical gastralgic attacks, which at certain times were brought on by anything whatever introduced into the stomach, and were not relieved by free vomiting. f Ziemssen's Cyclop., vol. vii., p. 306. - 6 4 - speaks favorably of the lactate of iron in 3-grain doses with equal parts of aromatic powder or extract of cinchona. In gastralgia due to hysteria, arthritis, etc., the underlying diathesis must be treated. Gouty or lithsemic patients require alkalies (Vichy water, lithia, potas. carbonate), colchicum, saline laxatives, the proper dietary regimen, and possibly a derivative treatment. Garrod recommends that the attempt be made by warmth and counter-irritants to excite deriv- ation to the joints. If the stomach be in such a hypersesthetic condi- tion that food excites the pain, it is still better that food be taken; there is nothing gained by a starva- tion treatment. As special remedies, Anstie speaks highly of nux vomica; ten drops of the tincture to be taken three times a day. The hyperaesthetic stomach is some- times benefited by full doses of bismuth, or oxalate of cerium. Hypodermics of morphine may be demand- ed. Leube especially recommends galvanism: ten to fifty elements, the anode upou the painful point of the epigastrium, the cathode on the left axillary line; the application to be kept up from five to ten min- utes.* * Leube, loc. cit. - 65 - ANGINA PECTORIS AND THE TRUE CARDIAC NEU- RALGIAS. There is a form of cardiac pain which is always of bad prognosis, because indicative of organic and gen- erally incurable lesion. It was first correctly described by Rougnon, and nearly simultaneously by Heberden, in 1768; it was afterwards called Heberden's disease, though Heberden gave it the name of angina pectoris, the word angina being indicative of the peculiar an- guish accompanying the attack. Seneca, who appears to have been a sufferer from angina pectoris, speaks in one of his letters of the suddenness of its invasion, which he compares to the impetuousness of a tempest (brevis impetus, procellce, simi/is); and he adds that the predominant sensation is one of anguish as of impend- ing death. This kind of cardiodynia has its seat in the ter- minal cardiac filaments of the pneumogastric nerve, and is due to ischasmia of the heart muscle. The old theory was that angina pectoris is a primary or symptomatic neurosis of the cardiac plexus. This is denied by the best recent authorities, who compare the pain to that attending gangrene from occlusion of an artery. " Let us suppose," says Germain See,* " that the myocardium receives less than its normal quantity of * G. See: Maladies du Coeur, 2d ed., 1883, P- 30. 5 MM — 66 — blood; the terminal extremities of the vagus will re- ceive less also. Now oligemia of a sensory nerve manifests itself by pain. This oligaemia also accounts for the peculiar distress, the anger." Huchard. in a recent work on arterio-sclerosis and the arterial cardiopathies!, which is the most complete by far that has yet appeared, sums up the numerous anatomatical and other theories, and gives weighty reasons for the view, which he holds in com- mon with Balfour, Kreysig, Tiedemann, Potain, Parry, Liegois, See, and others, that true angina pectoris is always dependent on lesions (sclerosis, thrombosis, atheroma, sometimes, however, spasm) of the coronary arteries, with ischaemia of the myocardium. The or- dinary lesion is arterio-sclerosis, which is sometimes of toxic origin (diathetic, alcoholic, nicotinic), sometimes a senile degeneration. There is an angina pectoris which ends almost always in sudden death; there are other kinds of car- diodynia, quite as distressing, which almost invariably terminate in recovery. The latter are functional and nervous. Huchard ranges the latter under the head of false angina pectoris (pseudo angina); they con- stitute the true neuralgias of the heart. Huchard divides the peculiarly neuralgic forms into three classes: the neurotic, the reflex and the f Huchard: Maladies du Cceur et des Vaisseaux, etc., Paris, 1889. - 6 7 - toxic. He formerly added a fourth the diathetic; but, he is now conviced that this, as a separate class, has no raison d'etre. (i.) The neurotic is that painful condition of the cardiac innervation which has its origin in the state of the nervous system accompanying hysteria, neurasthenia, hypochondria, exophthalmic goitre, spinal irritation, neuro-arthritism, and (according to some authors) epilepsy. (2) The reflex form, of peripheral or visceral origin, takes its point of departure in some distant irritation, as of the stomach, uterus, etc., which is re- flected on the cardiac plexus. Huchard, under this head, gives instances of reflex pseudo-angina accom- panying intercostal neuralgia, painful peripheral ex- citation of the nerves of the extremities, neuromata, and neuralgia of the left arm. (3) The toxic form, is perhaps, oftener caused by tobacco than by any other agent, and this (the nicotinic) is given as the typical, toxic species, though cases have been referred to tea, coffee and alcohol. There is a functional cardiodynia from tobacco-smok- ing relatively benign, resulting from spasm of the coronary arteries; this Huchard calls spasmo-nicotinic angina. There is another kind, also due to abuse of tobacco, which is dependent on arterio-sclerosis; he calls it sclero -nicotinic angina. The following table from Huchard, gives the principle distinctive features of the true and spurious anginae: — 68 — TRUE, ARTERIAL ANGINA PECTORIS. Anatomical Cause. — Aortitis, with obliteration of the coro- nary arteries. Sclerosis, with constriction or obliteration of the coronaries. An arterial affection. Symptoms. — Pains almost always paroxysmal, not per- manent, provoked by walking, emotional excitement, effort. Rarely periodical and nocturnal attacks. Cardiac pain isolated from other neurotic symptoms. Agonizing pain, with sensa- tion of compression as a vise. Pains of short duration, ceasing with repose. Sub-sternal seat of the pain, generally over the aorta. Attitude of the Patient. — Silence, arrest of all movements, the pain ceasing with absolute rest. No painful points, but the latter may be present when true angina is complicated with cardiac and phrenic neuritis by propagation of the peri-arteritis to the plexuses of nerves in the vicinity. Often sub-sternal anguish without pain. Prognosis. — True angina pectoris is almost always fatal. Treatment. — Arterial medication. Revulsives of no ac- count. FALSE, NEURALGIC ANGINA. Anatomical Causes. — Aortitis with neuritis of the cardiac plexus. Hyperaemia oi the cardiac plexus. Neuralgia of the cardiac plexus. A neuralgic or neuritic affection. Often (as in hysteria) a vasomotor neurosis. Symptoms. — Pains less frankly paroxysmal, often peri- odical, coming on at the same hour (hysterical, neurasthenic, pseudo-angina); not provoked by effort, bat often caused by cold. Attacks frequently periodical, recurring at fixed hours, and nocturnal. Cardiac pain associated with other neurotic symptoms. Pain less agonizing, with sensation of distention of the heart. Pains of long duration, not ceasing by repose. Seat of the pain often frankly cardiac. -69 - Attitude of the Patient. — Incessant agitation. Continu- ance of walking; rest brings no diminution of the pain. Exist- ence of points painful to pressure, especially along the tract of the phrenic nerves (neuritis of the cardiac plexus and of the diaphragmatic nerve). Anguish less pronounced, always asso- ciated with the pain. Pseudo angina is never fatal, except in cases where the cardiac neuritis is associated with coronary sclerosis. Treatment. — Anti-neuralgic remedies. Revulsives often beneficial. REFLEX, NEURALGIC, PSEUDO-ANGINA PECTORIS. A nervous affection. Symptoms. — Attacks spontaneous at times, but often pro- yoked by movements of the left arm, and by pressure over the painful nerves. Depends on some other (peripheral) neuralgia (brachial, dorso-intercostal), on gastric or other visceral dis- order. Is observed at all ages. Attacks long, not provoked by effort. Attention is early called to the visceral or other, affection. Pain precordial, with feeling of distention; little irradiation to arm and neck. In gastric pseudo-angina, signs of dilatation of the stomach often accompany it. Prognosis be- nign, never terminates in death. Treatment. — Revulsives, calmatives, anti-neuralgic reme- dies, anti-dyspeptic remedies. TOXIC PSEUDO ANGINA (FROM TOBACCO). (Generally by spasm of the coronaries.) Symptoms. — Attacks of angor, generally associated with other phenomena of a toxic kind; vertigo, gastric and respira- tory troubles, etc. Cardiac pain accompanied by other func- tional heart symptoms, such as palpitations, intermittences, arythmia, lipothymia, etc. Attacks long. Paroxysms gener- ally spontaneous, rarely provoked. Prognosis. — Rapid disappearance of the symptoms by suppression of the toxic cause. — 7© — Huchard gives an exemplification of the difficulty under which the clinical observer must sometimes labor in diagnosticating the affection. " In gout he may have thoracic angor under three conditions: (a) it is either a true angina, arising from an arterial lesion (arterio-sclerosis, atheroma of the coronary arteries, lesions of the aorta, etc.) to which gouty per- sons are always predisposed; or {b) gastric troubles, frequent in gouty patients, may provoke attacks of false angina pectoris which may terminate in recovery; or (c) the angina pectoris may be a neuralgic attack, such as gouty neurasthenic invalids are prone to." In true angina pectoris, the leading indication is to remedy the cardiac ischsemia which causes the pain. This indication can be only partially met by the so-called vaso-motor dilators, — nitrite of amyl (two or three drops to be inhaled from the open palm); nitro-glycerin (frequent drop doses of the centesimal solution); and iodide of sodium, which, ac- cording to Huchard, should be given in ten-grain doses three or four times a day for a long time. Hypodermics of morphia seems to favor the capillary circulation, as well as allay nervous irritation, and will be often demanded in severe paroxysms. In the pseudo forms, the general anti-neuralgic and revulsive treatment will be called for, due atten- tion being given to the cause, whether peripheral, visceral, or toxic. CHAPTER VI. REFLEX AND TOXIC NEURALGIAS. NEURALGIAS DUE TO A GENERAL MORBID CONDITION. Reflex neuralgias are caused by a lesion more or less distant from the seat of pain. The irritation is transferred or reflected from one set of nerves to the terminal filaments of another through the medium of the cerebro-spinal or sympathetic system. The sympa- thetic nerve is ordinarily the seat, and the primary cause of the pain generally resides in some one of the viscera, although the painful reflex may start in a cerebro-spinal nerve branch; an instance of this is seen in the severe eye-ache or brow-ache which some- times attends a carious tooth that may itself be pain- less. Lisfranc *once obtained the cure of a sciatica by the extirpation of a painless vaginal polypus. Other examples of reflex neuralgias are found in the hepa- talgia accompanying gastritis, gastralgia caused by taenia, cystalgia due to an affection of the kidneys. f *Vanlair, Loc. cit. \ "When no local pain is felt, we must assume that the centre to which the apparent impressions directly come is not thus excitable to painful activity, or even so as to influence consciousness, but that it is in connection with another centre which by natural or acquired susceptibility is disposed to ex- cessive action," "(Gowers' Neuralgia, Its Etiology, Diagnosis, and Treatment," p. 27.) The above is essentially Vanlair's explanation of reflex neuralgias, where the pain seems to spare the sensory centres of the region in which the cause exists, to be reflected on some distant centre. — 72 — Eye-strain is a fruitful cause of headache and neuralgia. This has been made very clear by Dr. Ambrose L. Ranney, in an article in a late number of the New York Medical Record: For some years past it has been my custom to examine repeatedly and with care, the visual apparatus of every patient sent to me for the relief of headache and neuralgia, I have already published, from time to time, many cases where this line of research has been followed by marked and permanent benefit.* I deem it worthy of remark, in this connection, that less importance is being attached to day than formerly to the clini- cal determination of modifications in the calibre of the blood- vessels of the brain. The conditions known as "cerebral congestion," or " cerebral anaemia" of certain authors who have written ex- tensively upon headache and neuralgia, are very often the results of underlying factors. Their existence (as has been claimed) may sometimes be revealed by the ophthalmoscopic examination of the vessels of the retina and confirmed by the effects of nitrite of amyl upon the patient; but when so, they are probably to be regarded rather as an evidence of a functional derangement of the vaso- motor system of nerves, than as permanent factors in head- aches or neuralgias. I have known many patients who have followed, with negative results, a prolonged course of treatment (by ergot, bromides, amyl, etc.), which was based upon the examination of the retinal vessels, and I have often seen them recover from their headaches and neuralgias without drugs when an anomaly of the refraction or of the muscular adjustment of the eyes was corrected. I would not be construed as denying that the blood- vessels of the brain might not have been abnormally dilated or peculiarly contracted in many of these cases at the time when their retinal vessels were examined; nor would I utterly reject * New York Medical Journal, January, 1888; Lectures oq Nervous Diseases, Philadelphia, 1888 (F. A. Davis, Publisher); Medical Register, Philadelphia, November 19, 1887. — 73 — the hypothesis that the retina sometimes affords us a valuable means of determining by our sense of sight the condition of the cerebral vessels in any given individual. What I do mean to assert is this: That changes in the cerebral circulation (as is often observed in the case of a blush upon the cheek) may be caused by subtle nervous influences that ergot, bromides, nitrite of amyl, or other drugs will not arrest; that a classification of headaches or neuralgias which is based upon so variable a sign is unscientific; and that any line of medication which is directed toward this condition alone is very liable to be unsatisfactory, both to the physician and his patient, sooner or later. To illustrate this point I will mention a remarkable ex- perience of my own that impressed me strongly at the time. Some ten years ago, when almost in despair from con- tinuous and intractable headache, and doubtful of my ability to long endure it, two oculists of equal prominence and ability were asked by me to examine my retinae by means of the ophthalmoscope. One diagnosed my condition as " typical nicotine poison- ing of the retina;" the other discovered what seemed to him to be conclusive evidences of " congestion of the brain," and that nothing but prolonged rest from work, in his opinion, could relieve. Neither suggested the detection of any "lateral " re- fractive error, or the use of glasses. My sight was apparently perfect and unusually acute. Subsequently the instillation of atropine into my eyes (which was used at my earnest solicitation) and the correction by proper convex glasses of a hypermetropia of 3.00 diopters (not previously suspected) restored me to health and comfort as if by magic. A complete and immediate cessation of all pain for over nine months followed the correction of my refractive error; and for many years I have been almost en- tirely free from pain, in spite of continuous eye-work at my desk and elsewhere." Dr. Ranney reports fifty cases of headaches — supra-orbital, frontal, and occipital neuralgias, which were relieved or cured by tenotomy of the recti mus- cles, or by suitable corrective glasses. He urges the necessity of using atropine upon a patient for diag- — 74 — nostic purposes when an error of refraction or of accommodation is suspected. " Personally," he adds, " I do not regard an examination as complete without it. It solves the common question of the presence of latent' hyperopia — a very common defect, and possibly a very serious one (irom the stand-point of the neu- rologist) if allowed to go unrecognized. It reveals the exist- ence of a previous ciliary spasm. It often arrests headache as if by a magic touch, and solves the nervous origin of many other similar symptoms.' 1 * These reflex neuralgias are familiar to everybody who has known headache from indigestion or from constipation. The disturbances of the alimentary canal are reflected upon sensory branches of the fifth nerve; here relief can only be obtained by rem- edies which correct the disorders of the digestive tube. I know persons whose "bilious headaches" (as they are called in the older terminology) are speedily remedied by an emetic of ipecac or a calomel purge; others can only keep free from these headaches by rigid dieting and some mild stomachic and aperient, like the infusion of rhubarb and cardamoms: (5 Rhubarb, in coarse powder, Cardamom seeds (bruised), aa 3 i, Aquae ferventis, § viii. M. Infuse half an hour, strain, and take a wine-glassful when the stomach is oppressed. Pathology is full of instances of disturbances of function owing to a morbid irritation in a distant part of the body. Thus, the irritation of teething sometimes causes convulsions, New York Medical Record, Jan. 2?, — 75 — and a prolapsed uterus has been known to cause melancholia. Maudsley thus explains this reflex transmission: "A molecu- lar change in the interior of a nerve being set up by the pri- mary irritation * * * is carried to any part with which it is in connection by continuity of nerve structure; when the molecular agitation reaches a motor centre it is reflex move- ment or reflex paralysis; when it reaches a sensory centre it is reflex or sympathetic sensation; when it reaches the supreme ideational centres it may occasion reflex disorder of thought, feeling, and will." Toxic Neuralgias. — A good instance of neuralgia of toxic origin is the hemicrania which sometimes attends renal insufficiency and ursemic poisoning. This kind of neuralgia has, however, been classed by some authorities among the holopathic, which are due to a general morbid state. (See Vanlair's table). Lead colic is an obstinate neuralgia of the abdominal walls from lead poisoning. The pain ordinarily starts from the umbilicus and radiates through the entire abdominal muscles. It presents at times atrocious paroxysms; is ordinarily accompanied by nausea, vomiting, and con- stipation. The treatment is by calmatives, purga- tives, and iodide of potassium; the latter favors the elimination of lead from the system. The osteocopic pains of syphilis have been classed among the toxic neuralgias. Here the spe- cific treatment alone will do good; small doses of cal- omel, -fa grain every hour for a day or two, sometimes work marvellous results. Syphilitic neuralgia is also a holopathic neuralgia, _ 7 6 - according to Vanlair. But syphilis is attended with palpable lesions which cause pain, and the existence of true neuralgia from syphilis has been disputed. Some cases of neuralgia from mercurial saliva- tion have been noticed. Anstie narrates one of a young girl, who not only lost every tooth in her head and suffered extensive exfoliation from the maxillae, but after the process was over suffered frightfully from neuralgic pains in her arms and legs. This pa- tient got better under tonics and cod liver oil, but was never fully restored. In neuralgia from abuse of mercury, it is found that iodide of potassium in as large doses as can be borne, and continued for months, gives the most relief. Neuralgias from alcohol, tobacco, arsenic, and ergot, have also been noted; these agents operate not so much by their irritant properties as by bringing about a condition of malnutrition and dyscrasia. Under the head of toxic neuralgias might also be ranged many neuralgias which, like the neuralgias of syphilis and Bright's disease, are due to some morbid material in the blood depressing innervation and dis- turbing nutrition; they are also neuralgias due to a general morbid state. Thus writers have spoken of: i. Gouty Neuralgia. Gouty neuralgia has a predilection for the viscera, especially for the gas- trointestinal canal (Vanlair), and for the sciatic nerve. These neuralgias sometimes take the place of the regular gouty paroxysm (having thus a metastatic — 77 — character); they disappear under the influence of an arthritic attack (gout in the great toe), or even of a cutaneous eruption; they coincide with the uric acid diathesis; the exciting cause is often exposure to cold, even an unusual dampness in the atmosphere. These neuralgias are benefited by calmatives, by derivation to the usual seats of election of the gout, by alkalies, by colchicum, by drastic purgatives, and, in short, by the general treatment of gout. 2. Rheumatic Neuralgia. It has been customary to regard those painful attacks which are consequent on " catching cold " (as when a person is exposed to cold and wet, and has severe pains in the muscles of the neck, in the shoulders or back, in the tract of the sciatic nerve), as rheumatic neuralgia. Undoubtedly face-ache and migraine are often excited by sitting in a draught. There is much obscurity with regard to the pathogeny of neuralgia a frigore, as well as of rheumatic neuralgia generally; nor is even the partic- ular materies morbi of rheumatism yet known. Erb believes that in these rheumatic neuralgias, slight in- flammatory conditions of the neurilemma are com- monly present (hyperemia, swelling, exudations, etc.) Eulenburg states that neuralgia caused by cold, more frequently attacks the sciatic nerve than any other, and thinks that the tendency to sciatica is characteristic of the relation of rheumatism to the sensory nerves.* Cited by Anstie. - 7 8 - To justify one in calling any particular neuralgic attack rheumatic, he would have to show a history of previous rheumatism; it would not be enough to infer a rheumatic origin from the fact that the attack fol- lowed exposure to cold and wet. It is doubtful whether rheumatism or the rheumatic diathesis has any very frequent causal connection with any form of neuralgia. 3. Diabetic Neuralgia. — Neuralgia has some- times occurred in instances where it was convenient to trace the painful affection to a " glycaemic crasis " of the blood, and where an anti-diabetic regimen has alleviated or cured the pain. Worms* has made a spe- cial study of this neuralgia; these are his conclusions: (1). There exists a special form of neuralgia proper to diabetes, which presents for its character a disposition to be seated in the two symmetrical branches of a same nerve; (2) Thus far, this symmetrical neuralgia has been chiefly observed in sciatica, and in the inferior dental nerve; (3) Diabetic neuralgia appears to be much more painful than the other neuralgias; (4) It does not yield to the ordinary treatment of neuralgias (quinine, morphine, bromides, etc.); (5) It is aggravated or mitigated coincidently with the aggravation or attenuation of the glycaemia. * Vanlair, loc. cit., p. 309. — 79 — 4. Albuminuric Neuralgia. — There is probably no disease that more profoundly modifies and vitiates the blood than Bright's disease in its advanced stages. Irritation and degeneration of the nervous centres is certain to follow; hence the stupor, the convulsions, the obstinate headaches, the amaurosis of chronic parenchymatous or interstitial nephritis. The head- aches of albuminuria are ursemic (whatever that word may mean); they are generally seated about the brow or vertex, are obstinate, lasting in some cases five or six weeks without much mitigation; are exasperated by heat and light, and resist all ordinary therapeutic means, though they sometimes yield to a thorough depurative treatment. 5. Zymotic Neuralgias. — Obstinate neuralgia sometimes follows the acute infectious diseases, and as a result of the general blood poisoning and nerve degeneration. Patients convalescing from diphtheria, typhus, yellow fever, cholera, the eruptive fevers, etc., besides being predisposed to the ordinary neuralgias, are often afflicted with severe pains of a very peculiar and puzzling nature. Such was the case of a young man, a private patient whom I last year attended during an attack of typhoid fever. The disease ran a severe course, and convalescence only came on about the thirtieth day of the fever, and was slow and tedious. This patient complained of pains, some- times acute and shooting, sometimes dull and contin- ued, in the soles of his feet. These pains were such — 80 — as to deprive him of his sleep, and morphine injec- tions were for a long time required; they eventually wore off with return of health. Another patient whom I attended in the Anna Jaques Hospital for typhoid fever, had, during con- valescence, severe pains in the calves of the legs. It should be mentioned in this connection, that some authorities, as Vanlair, do not regard these neu- ralgias as so much due to the presence of bacteria in the blood or poisonous ptomaines, as to the degenera- tive lesions of the nervous system brought on by long exhausting illness. 6. Under the head of holopathic neuralgias, Van- lair classes certain mestastatic neuralgias due to the abrupt suppression of the menses, of a haemorrhoidal flux, of chronic pulmonary catarrh, or of old ulcers. He might have added, the retrocession of a cutaneous eruption. I myself once witnessed the supervention of a severe hemicrania in a woman on whom I had operated by ligature for bleeding piles; it was only after some months of rather frugal dieting, and the plentiful use of Carlsbad salts, that this patient ob- tained exception from headaches. Barras cites a similar case, where obstinate gastralgia followed the suppression of hamorrhoids. 7. Hysterical Neuralgias belong to the same category of neuralgias due to a general morbid state. Hysteria is responsible for a great variety of neural- gic affections, ramicular, visceral, and cutaneous. — 81 — Hysterical neuralgia is prone to take on the hemi- cranial form, and the characteristic clou hysterique has long attracted the attention of physicians. Hysteri- cal neuralgias have a marked prediliction for the left side of the body. These neuralgias markedly resemble the idiopa- thic, but their dependence on a diathesis justifies their classification among the holopathic. 8. Chlorotic and Antzmic Neuralgias. — Neural- gia, according to Trousseau and Pidoux, " is an al- most constant symptom of chlorosis - " The three forms most peculiar to this morbid constitutional state are headache, gastralgia, and mus- cular aching; the latter resembles the sensation of fatigue rather than muscular rheumatism. It is in these cases that a tonic, fortifying regi- men (exercise in the open air, boating, horse-back riding, skating; full diet consisting of meat, eggs and fats), with iron, arsenic, and manganese, sometimes works wonders. Attention to the excretions is im- portant; iron does not work well if the bowels are constipated; warm baths to promote the cutaneous functions followed, as the patient can bear it, by cold water treatment, may be important adjuvants to a successful medication. 9. Malaria is frequently a cause of neuralgia, es- pecially in regions where fever and ague prevail. The nerves most commonly affected are the supra-orbital branches of the fifth. A distinct feature of this in- — 82 termittent brow-ache is a periodicity of the attacks which are separated by intervals of complete calm. The type is tertian, double tertian or quartan, al- though the quotidian type is by no means uncommon. It is in this kind of neuralgia that quinine in full doses is attended by the happiest results. 10. Ergotic neuralgia (from eating spurred rye) has been witnessed in certain parts of France. The ex- tremities (hands or feet) are affected with numbness, tingling, darting pains (acrodynia or cheiropodalgia). It is doublful if this affection can properly be called a true neuralgia. CHAPTER VII. DIAGNOSIS. The distinguishing features of idiopathic neural- gic pains are: i. Their frankly intermittent or remit- tent character; 2. The suddenness of their onset (Anstie gives as an example the sudden and violent neuralgic pain of the eyebrow which some persons ex- perience from swallowing a bit of ice); 3. The limita- tion of the pain to a definite nerve trunk or the area occupied by its terminal branches, and its generally unilateral character; 4. The points douloureux which occur in various parts of the tract of the nerves; 5. The various motor, vaso-motor and trophic disturb- ances which accompany the painful phenomena, and which pertain principally to the area of distribution or immediate vicinity of the nerve or nerves affected; 6. The absence of fever or other marked constitutional disturbance and the signs of local inflammation; 7. Finally, the characteristic common to all neuralgias, that fatigue and every other depressing influence directly predispose to an attack and aggravate it when already existing (Anstie). With these diagnostic characteristics in mind, one will hardly confound an ordinary headache from in- digestion or lithaemia with true neuralgia, for the heavy character of the pain in the former instance, with scarcely any tendency to ingravescence, and its — 84 - usually bilateral situation, the nausea, languor and coated tongue, which ordinarily accompany it from the first, sufficiently distinguish it from migraine. Moreover, these attacks of gastric headache are not periodical, but arise from some error in diet, and not infrequently from catarrh of the stomach. It is hardly necessary to qualify the foregoing remark by the statement that true migraine does sometimes find its provoking cause in dietary indiscretions. Neuralgia has been confounded with peripheral neuritis; the pathognomonic features of the latter, ac- cording to Nothnagel, are as follows: i. The spontaneity and continuousness of the pain. Paroxysmal exacerbations are not wanting, but they are more rare than in neuralgia. 2. The peculiarly cyclical course of the attacks; the pains come on, and disappear, gradually. 3. The constant awakening or exasperation of the pain under the influence of pressure. 4. The cessation, after a certain time, of the pains both spontaneous and provoked. (This is not properly a pathognomonic sign of neuritis, seeing that it is met with in other affectious of the nerve- cords.) 5. The centripetal direction of the spontaneous or provoked pain. 6. The precocity of the cutaneous anaesthesia. 7. The appearance of trophic disturbances in the domain of the nerve; notably, alterations of the - 8 5 - cutaneous tegument and its dependencies (thickening of the skin, herpes, lesions of the hairs, nails, etc.). Rapid muscular atrophy would have almost the same significance. To these signs (of varying value) Vanlair would add the following: (a) The more circumscribed and direct limitation of the pain — neuritis limits itself, ordinarily, to a definite nerve, and rarely gives rise to irradiations into the extremities of the nerves; (£),the fixedness of the seat; (c), the absence of multiple painful points; (d,) the exaggerated excitability of the diseased nerve — in idiopathic neuralgia the nerves lose their electric sensibility; (e), the constant appearance of troubles of motility (when the affected nerve is a mixed nerve); (/), the possibility, in some cases, of feeling the swelling and induration of the nerve, sometimes even of per- ceiving a reddish streak visible at the surface of the skin; (g), the very constant presence of a traumatic cause, of the local action of intense cold, etc.; (/t), the ordinary absence of relapses, while relapse is the rule in neuralgias; (/), the fever, when it exists.* Myalgia (muscular rheumatism) is the pain of over-fatigued muscles — of muscles obliged to work when imperfectly nourished. A familiar example is the stiff neck, or lumbago resulting from exposure to cold, an accident especially likely to occur when the * Vanlair, loc. cit., p. gS. — 86 — individual is enfeebled by work and is perspiring; pleurodynia, or pain in the intercostal muscles, is another example of myalgia, and this affection is often mistaken for pleurisy by the laity. Bearing in mind the distinguishing features of neuralgic pains (before given), there can be little like- lihood of confounding neuralgia with myalgia. One characteristic of myalgic pains is, that they are materially relieved by change of posture and rest — by keeping the affected muscles in a position of full ex- tension. The pains can be easily referred to the area of certain muscular groups; and if there are any ten- der points, these are over the tendinous origins and in- sertions of the muscles. Myalgic pains are aggravated by movements, and occur in persons of no neurotic tendency as often as in the neuralgic; while heredity has no marked influence in their genesis. Spinal Irritation may be looked upon as a mye/a/gia, i. e., a neuralgia of the medullary axis. Be- ing, therefore, per se a member of the group of neural- gias, its diagnostic features need brief statement here. These consist in the connection of certain symptoms, or groups of symptoms, with tenderness in particular regions of the spine. Thus, when the region of ten- derness is in the cervical region, there are symptoms such as headache, nausea, vomiting, face-ache, fits of insensibility, cough, pains in the upper extremities, etc. When the tenderness is in the cervical and dor- sal region, there may be, in addition, pains in the - 8 7 - sides and in the stomach, pyrosis, palpitation, and oppression. When the dorsal region is the seat of the spinal tenderness, there will be pain in the stomach and sides, cough, oppression, fits of syncope, hiccough, eructa- tions. With tenderness in the dorsal and lumbar re- gions, in addition to the symptoms of the foregoing group, there will be pains in the abdomen, loins, hips? lower extremities, and dysuria and ischuria. With tenderness in the lumbar region principally, pains in the lower part of the abdomen, testes or lower extremi- ties, dysuria, ischuria, disposition to paralysis of the lower extremities.* Pseudo-Neuralgias — The pseudo-neuralgias, as has been elsewhere said, owe their existence to some lesion in the region where the pain is located: i. e. they come on after a wound injuring a nerve or nerves, or they are consequent on some tumor, as a neuroma or a malignant growth, a congestion or some obscure diathetic condition. The intense pain * This disease was first identified by T. P. Teale in 1829, "On Neuralgic Affections Dependent on Irritation of the Spinal Marrow," 1829; also by the Griffin brothers in their valuable monograph, 1844. The subject is well presented by Hammond "On Spinal Irritation," Leisure Library Series, 1886. The treatment is by restoratives and rest, nerve sedatives and an- algesics; blisters over the painful points are highly spoken of. See further, Radcliffe's article in Reynold's System of Medi- cine. that accompanies an ophthalmia or ulceration of the cornea belongs to this category. The pains of con- gestion in general, whether the nerve trunks par- ticipate in the hyperaemia, or are simply pressed upon or stretched are of this nature. The pains of pneu- monia and pleurisy, of hepatitis, of cystitis, of metritis, etc., where not due to actual neuritis, belong to the same category. There is a rare painful affection called by S. Weir Mitchell and Lannois "angio-paralytic neuralgia of the extremities " occupying the lower ex- tremities, the soles of the feet especially, sometimes unilateral, sometimes bilateral, which should also be classed under this head. The pain wich attends gangrene is another in- stance of the kind. The reverse of hyperemia or fluxion, namely ex- treme anaemia, causes pain quite as excruciating as any neuralgic suffering, and no better example can be given than the pain following embolism of an import- ant artery. Wounds of nerves (by swords, knives, fire-arms, etc.) cause painful neurites which are sometimes very intractable. The symptoms of neuritis have been given above and need not here be repeated. The ordinary traumatic neuralgias appear several weeks after the lesion. They may get well, or persist long after the cicatrization of the wound. They sometimes so resemble the essential neuralgias as to be nearly if not quite indistinguishable from them. The pains - 8 9 - are of the same lancinating character, and there are the tender points; in many cases there is an intoler- able burning sensation (causalgia), which is patho- gnomonic of nerve injury. The trophic and motor troubles attending trau- matic neuralgias are more severe and persistent than those attending essential neuralgia (hypertrophy, atrophy, motor paralyses). The epidermis is prone to atrophy, giving the appearance known as " glossy skin." It is not necessary to dwell on the pains of cancer which can offer no difficulty in diagnosis. With regard to the little painful tumor called neuroma, it often follows amputation of a limb, the section of a nerve, and it is attended with pain of a very intense and persistent kind. There is generally anaesthesia in the domain of the affected nerve, and the patient complains of numbness. Nothing but ex- cision of the morbid growth does much good. Those painful affections of the joints first de. scribed by Brodie, and known as hysterical arthro- pathies belong to the category of pseudo-neuralgias. Here the diagnosis, as in the true hysterical neural- gias, must be based on considerations drawn from the presence of the pathognomonic symptoms and stig- mata of hysteria itself. If visceral neuralgia be suspected, the physician will, by the proper means of exploration, exclude the presence of any organic disease. — 9° — Cerebral abscess might be confounded with neu- ralgia of the head. The former is sometimes a sequel of caries of the internal ear and purulent discharge, the result of scarlet fever, measles, etc., in childhood; may follow a blow on the head. There are no true "points douleureux" and the pain does not completely intermit; the pain is fixed, tenacious, profound and circumscribed; there are no well localized secretory or vaso-motor phenomena; the pain is usually attended by severe psychical and motor disturbances (delirium, coma, convulsions, hemiplegia) which are sufficiently characteristic of central disease. It might be easy to mistake the lightning pains of locomotor ataxia for those of true neuralgia, but in the spinal disease there are symptoms denoting de- generation of the posterior root-zones; the peculiar staggering gait, the numbness in the feet, the fre- quent impairment of sight, the suppression of the tendon reflexes, etc. The early signs of locomotor ataxia, especially insisted upon by Dr. Marx Karger, are, besides the presence of a cord like sensation around the waist, numbness of the lower extremities, retardation of the rate conduction of sensations, the difficulty or inability of balancing the body when the feet are placed parallel or close together and the eyes are shut (Romberg's symptom), the absence of the patellar-reflex, and the want of reaction of the pupil. As genuine neuralgia may be the result of alco- holism and mercurial poisoning, so there are certain — 9 I — pseudo-neuralgias due to these poisons distinguish- able, according to Erb, by their persistence, their localization in symmetrical parts of the extremities, especially in the vicinity of joints. Erb, while ad- mitting that syphilis may produce true neuralgia, regards the osteocopic pains of syphilis as true organic pains, the result of morbid deposit about nerves, and distinguishable from neuralgic pains by their seat, their symmetrical position, and their noc- turnal exacerbations.* The limits of this treatise will not allow me to enter upon the vexed question of the diagnosis of neuralgias of central from those of peripheral origin, a matter concerning which we have still few fixed rules for our guidance. As for the diagnosis of those neuralgiform pains which depend on an appreciable lesion of the en- cephalon or cord, the following characteristics (given by Vanlair) will aid in distinguishing them from idiopathic neuralgias: i. They present an exceptional obstinacy. 2. The pain is sometimes continuous, sometimes inter- mittent. In the latter case, it often manifests itself as a light- ning irradiation which does not follow the anatomical tract of any nerve. 3. It presents generally, when it is continous, a great fixedness. 4. These pains, unlike ordinary neuralgias, occupy a nerve in its totality, i. e. t the trunk of a nerve and all its *Ziemssen's Cyclop., Vol. XI, p. 64. — 9 2 — branches. We have an example in the case of neuralgia of the trigeminus due to intra-cranial tumor. 5. It often invades little by little other nerves whose origin borders on that of the nerve primarily involved. 6. Pressure exercised over the region of the nerve centres corresponding to the point of emergence of the nerves, often produces a very severe pain extending to all the ramifications of the nerve. 7. Local means, i.e., all those applied over the tract of the nerve, are inefficacious.* * Vanlair, loc. cit., p. 92. CHAPTER VIII. PROGNOSIS. The prognosis is more favorable where heredi- tary influence is absent than where it is present. The idiopathic neuralgias are less amenable to curative means than the symptomatic or constitu- tional; the latter, whether chlorotic, syphilitic, malar- ial, diabetic, or gouty, get well or improve as the con- stitutional state improves, on which they depend. The toxic neuralgias will be likely to undergo attenuation and disappear when the toxic agent which causes them ceases to act or is eliminated. Neuralgias accompanying grave cachectic states, from whatever cause, are relatively obstinate. None are more intractable than those of the decline of life and of old age, and neuralgias of central origin are more difficult of treatment than those of peripheral origin. It can hardly be said that sex influences the prognosis. Neuralgias of long standing with frequently re- peated attacks are among the least curable. Hysterical neuralgia is apt to be very obstinate. Neuralgias of early life are relatively benign. According to Gowers, neuralgias of the fifth nerve are more intractable than all others. CHAPTER IX. THE TREATMENT OF NEURALGIA. PROPHYLACTIC TREATMENT. Idiopathic neuralgia, like other neuroses, is a hereditary disease. The ancestors of the neuralgic subject — one, or more of them — were either neural- gic, or were sufferers from hysteria, epilepsy, or some other neurosis; or, the parent may have impaired a naturally good constitution by intemperance or some other vice, and so entailed on the offspring that in- stability of nerve-organization which, under suitable provocation, finds expression in some form of neu- ralgia. There are, of course, exceptions to the rule that neuralgia is a hereditary disease ; children born healthy have had their constitutions under- mined by insufficient diet, by some one or more of the diseases peculiar to children (as scarlet fever or diphtheria), or even by precocious addiction to some vice. Children who have inherited the neuralgic tem- perament should not be allowed to study too hard at school, and should not be subjected to physical tasks of an arduous and exhausting nature. Moderation in all things should be the rule. Such subjects are unfitted to bear a strain. At the same time, - 95 — they should be required to be much in the open air, to indulge in invigorating sports, to perform gymnastic exercises of certain kinds which can be borne with- out too much fatigue, to practice rowing, horse-back riding, and swimming. The cold bath or cold douche in the morning is a good auxiliary. All these hygienic measures improve the circulation and develop a strong muscular and nervous organization. Hydro- therapy especially toughens the integument and prevents the frequent occurrence of debilitating rheums. To these means should be added a full, generous diet of meat, eggs, fish, milk, cereals, vegetables, and fruits. Very many cases of neuralgia have been traced to a meager and insufficient dietary. When we remember that neuralgia is essentially a disease of malnutrition, and that nerve substance is a con- glomerate of richest animalized principles (phos- phorized oleo-albumen), we see that we must place in the foremost rank of remedial agencies those means which improve or restore the nutritive functions. Some of the worst forms of migraine, prosopal- gia, etc., that I have ever seen were among the poor and ill-fed. For delicate, half-starved children, brought up in slums and crowded tenement houses, there can be but little hope; out of these breeding places of dis- ease, come the multitude of the hysterical, the neural- gic, the nervously shattered, who float about between the hospital and the alms-house. - 9 6 - The neuropathic child should be taught the neces- sity of plenty of sleep. Too much emphasis cannot be placed on this requirement. Eight, even ten hours sleep a day is not too much. Those predisposed to neuralgia should be compelled to go to bed early — between the hours of nine and ten every night, and all evening excitements should be forbidden. Among the latter should be mentioned the reading of dime novels. As everything that favors the precocious devel- opment of the passions is bad, the evil influence of corrupt companions is to be deprecated and avoided by every possible means. It is, however, a matter of great difficulty for the parent or guardian always to avert such influences, for the cousin or class-mate of the moral and " goody " sort is often the one who in secret instils the poison and corrupts the nature of the child. Doubtless the evils of masturbation, as practiced by children, have not been too highly painted. The neuropathic child cannot be too early, too earnestly, or too faithfully warned against the pernicious effects of this vice. PROPHYLAXIS IN THE ADULT. The adult, who, by faulty organization, by de- bilitating influences, by previous attacks of neuralgia, is predisposed to this neurosis, demands essentially the same prophylactic hygiene as has been above out- — 97 — lined. He should possess some light, healthy em- ployment, and avoid occupations that involve arduous toil and great anxiety. Good, nutritious food at regular seasons should be eaten, and alcoholic and other stimulants eschewed; the neuralgic should also religiously refrain from smoking. These patients are prone to seek excitement, and often suffer a break- down in consequence. One patient with whom I was acquainted, used invariably to experience a return of her megrim after going to an evening party or a ball. Such persons are uncommonly vivacious under ex- citement, and endure well the strain for the time being. They are, however, capable of using up in one evening's dissipation all their reserves, and of bringing their nerve-centres into a state of unnatural erethism that weeks of rest may not calm. The condition of these sufferers is often deplor- able. Of fine literary and aesthetic tastes, they can- not long enjoy reading, artistic pursuits, etc., without paying the penalty in an attack of severe orbital or supra-orbital neuralgia. One of my acquaintances cannot read an hour consecutively without twinges of pain. through his temples, which oblige him to desist, He regards himself as shut out from the best enjoy- ment of life; is gloomy and suicidal. Persons of this temperament need an especially fortifying regimen; of which life on the sea (yachting), in the woods, among the mountains, with absolute freedom from brain work, shall form the principal part. - 9 8 - Some writers (as Vanlair and Anstie), have found excessive religiousness a factor in the genesis of neu- ralgia; but doubtless an ardent espousal of the most gloomy theological beliefs is less harmful than the indulgence of depressing vices, or the cultivation of voluptuous appetites. The same remarks that have been made about sleep, are applicable to the adult neurotic, who should have regular habits of sleep, and whose sleep should be long and sound. If he happens to be a poor sleeper, he should endeavor to woo tired Nature's sweet restorer, by taking much exercise in the open air, and especially diverting exercises, by cold bath- ing in the morning, and the warm bath just before going to bed, with vigorous shampooing of the body, along with the sipping of a cup of hot water contain- ing some mild cordial, as spirits of lavender, or even a little Fluid Beef; this is far better than re- sorting to any of the ordinary hypnotics, as chloral and sulphonal, which are sure, in the end, to leave the nervous tonus damaged. It is only exception- ally that I would allow a neuropathic patient to apply to any of the so-called hypnotics for relief. Where a small dose of whisky, or a glass of bitter ale will produce refreshing sleep, this is safer than chloral or a narcotic. Sometimes it makes a great difference what the victim of insomnia eats for his supper, and there are all sorts of idiosyncrasies in regard to this. Some persons will sleep better with — 99 — a full, some with an empty stomach. To some pa- tients your best prescription is a supper of hominy and milk; to others, a light lunch, or cup of beef-tea on going to bed; a full dose malt extract. Above all things, the neuralgic invalid should have a mind at ease, for anxiety, care, worry, over- mastering passions, are the greatest foe to healthful sleep. As adjuvants to a cure, there are certain tonic medicines which deserve mention here : Quinine, strychnine, iron, arsenic, and a very moderate amount of some of the fermented liquors, wine and beer. To the anaemic, iron and arsenic are especially useful; a good combination is the iron, arsenic and strychnia pill, furnished by a number of our pharma- cists. Fothergill's pill is a good stomachic tonic. Its formula is as follows: 5 Acid arseniosi, gr. j. Ferri sulph. excic, 3 ss. Pulv. capsici, 3 j. Pil. aloes et myrrh, q. s. M. Ft. pil. No. LX. Sig. One pill three times a day. A pill of dried sulphate of iron, aloes and myrrh, i grain each, sometimes works well in chlorosis ac- companied with constipation. The same may be said of the well known sulphate of iron, sulphate of qui- nine, and sulphate of magnesia mixture. Or five minims of Fowler's solution may be asso- ciated with ten grains of bicarbonate of sodium and five of potassio-tartrate of iron in a fluid ounce of infusion of quassia; this dose to be given after each meal. Arsenic is one of the best anti-neuralgic reme- dies that we possess. According to Anstie, it is es- pecially useful in the visceral neuralgias. With arsenic, cod-liver oil may often be conjoined to ad- vantage. More satisfactory results will be obtained from the pure oil, when it can be borne, than from any of the emulsions, of all of which, according to my experience, patients soon tire. Too much care cannot be taken that the oil shall be perfectly sweet and fresh. A course of electric treatment (galvanism pre- ferably to Faradism), sometimes works well; both by calming the erethism of the nerve centres, and pro- moting the nutrition of the latter. The electrical treatment of neuralgia will claim especial considera- tion in another chapter. Treatment of Diatheses which lead to Neural- gia. — Neuralgia is sometimes under the dominance of a diathesis, such as gout, chlorosis, rheumatism, hysteria, diabetes. The treatment which is devoted to the diathesis is the proper treatment of the neu- ralgia. Neuralgia of Toxic Origin. — Neuralgia may be dependent on a poison in the blood; lead, mercury. arsenic, alcohol, malaria. Here the leading indica- tions are : i, To suppress, then antidote, then pro- mote elimination of the poison; 2, as far as possible to protect the organism from the effects of the toxic agent, and palliate symptoms as they may arise. It is evident that when the proper antidote can be ad- ministered, this is the remedy par excellence for the neuralgia. In malarial neuralgia, for instance, qui- nine in large doses is indicated. In alcoholic neu- ralgia, suppression of all alcoholic stimulants should be strictly enjoined. In nicotinic neuralgia, tobacco should be abstained from. In colica pictonum, the proper treatment of lead poisoning will also cure the neuralgia. Reflex Neuralgias. — These neuralgias are due to a localized morbid state (of the uterus, kidneys' etc.) and the successful treatment of the suffering organ will cure the neuralgia. Surgical means of cure. — Neurotomy, neurectomy and nerve stretching have all been practised for the cure of intractable neuralgia. Nerve stretching has been principally applied to sciatica, and neurectomy (which has given some brilliant results), to the treat- ment of prosopalgia. Treatment of Neuralgic Paroxysms. — When you are in the presence of an attack of neuralgia, the first thing, of course, to do is to relieve the pain. It is desirable, if possible, to obtain analgesia without re- sorting to morphine. In many of the neuralgias, such 102 as migraine, and those of central origin, whether idio- pathic or symptomatic, antipyrin often gives speedy, marked relief, fifteen grains being followed by com- plete disappearance of the pain. A repetition of the same dose in the course of a few hours, and a contin- uance of this treatment for several days, the antipyrin being given often enough to keep the pain under sub- jection, may be all that is required, the patient being as far as possible removed from the reach of causal influences. This is Germain See's treatment of the headaches of students, headaches which often oblige matriculants to suspend study for weeks or months. Acetanilid, in half the dose of antipyrin, may be attended with an equally good result, and the same may be said oi phenacetin, which is coming into gen- eral favor. Lately exalgin has been well spoken of; it has been praised as an anti-neuralgic by Dujardin- Beaumetz and Bardet. I must express my own partiality for phenacetin, which I have found hypnotic as well as analgesic. I have also seen good results from acetanilid in neuralgic headaches. In cervico-brachial, dorso-lum- bar, and sciatic neuralgia, I have seen no benefit from any of these new remedies except phenacetin. Citrate of caffeine and guarana are remedies from which much good may be expected in hemicrania, and always where the pain seems to be the consequence of nerve tire. The dose of caffeine is three or four grains, of guarana twenty grains. — 103 — The following prescription, for which I am ' in- debted to the late Dr. George M. Beard, has given good results in headaches of all kinds: ^ Cit. caffein Carb. ammon aa 3j. Elixir guaranae f § j. M. Sig. — A teaspoonful every hour till the pain is relieved. Some of my patients, delicate, migrainous patients, keep a bottle of citrate of caffeine constantly on their toilet tables; a frequent resort to it keeps them free from headaches. I have never seen any harm result from the continuous use of this drug. Bromo-pyrin and Bromo-caffeine are two pro- prietary medicines whose efficacy depends on the an- tipyrin and caffeine which they contain. Aconitine, in pills of j^-q grain, one pill every five hours till the supervention of the physiological effects, or till the pain disappears, sometimes has a charming effect in migraine and tic douloureux. In face-ache, especially when due to a decayed tooth, the tincture of gelsemium in five-drop doses, every two hours, is often followed by speedy subsid- ence of the pain. I have always found gelsemium in this dose to be a perfectly safe remedy. Some practitioners have great faith in a full dose of quinine (fifteen grains) in neuralgias of the peri- pheral nerves, whether due to malaria or some other cause. I cannot say that I have ever found this alka- loid beneficial in neuralgic paroxysms, except where — 104 — the attack was clearly of malarial origin. Gross' neuralgic pills, in which quinine is combined with aconite, strychnine and morphine are, I think, chiefly of use as a prophylactic where attacks have been fre- quent. As outward applications, chloroform liniment, veratrin ointment, extract of belladonna rubbed up to a paste with water, spread on cloth and applied over the seat of pain, have had their advocates. No external means can be relied on. Anodyne embroca- tions are more useful when the pain is rheumatic than when it is neuralgic. Hypnotizers claim to have accomplished wonder- ful results by putting the neuralgic sufferer into the hypnotic sleep, and assuring him that the pain no longer exists. As nothing is impossible, a priori, and all things are to be believed on sufficient testimony, we have now adequate warrant for a certain faith in hypnotism as a means of cure. Bernheim's book on "Suggestion as a Therapeutic Agency" contains a number of instances of severe neuralgic and neuralgi- form pains cured by hypnotic suggestion.* It will often happen that none of the above means * It cannot but be admitted, however, and good clinical authorities are coming to see this, that the frequent repetition of hypnotic practices is likely to be promotive of hysteria. Germain See declares that to relieve pain by hypnotism and to render the patient hysterical thereby, is to cast out Satan by Beelzebub. — io5 — are applicable to the case in hand, or, if tried, they have resulted in failure. There is nothing to do then, but to resort to a hypodermic injection of morphine. The tablet triturates of the pharmacists are very handy for this purpose. The commencing dose should be the sixth of a grain. If no relief is obtained, the njection may be repeated in fifteen minutes or half an hour. In bad cases of tic douloureux, migraine, visceralgia, I have often had to repeat these injections every half hour until a grain, a grain and a half, and even two grains have been administered. Severe pain creates great tolerance of morphine. I have seen a delicate neurotic girl in a paroxysm of cervico-brachial neuralgia bear with impunity a quantity of morphine introduced subcutaneously that would have killed a strong, well man. There is not the same tolerance of atropine, and it will not do to push the injections of this alkaloid. If, for the first injection, one of the morphine and atropine tablets be used, in the subse- quent injections the atropine should be omitted. The dryness of the mouth and throat that follows a full dose of atropine gives the patient great annoyance and discomfort. For ordinary hypodermic use I employ a solution of morphine, consisting of four grains of sulphate of morphine to a fluidounce of cherry-laurel water. Of this, a hypodermic syringeful may be injected with safety to an adult. The cherry-laurel water keeps the solution from spoiling. — 106 — Inject into a fleshy part of the arm; there is no advantage in injecting over the seat of the pain. Deep injections of chloroform sometimes as effec- tually relieve the pain as morphine injections. For sciatica, take up a syringeful of pure chloroform and inject it the depth of the syringe-needle into the gluteal muscles. Antipyrin may also be used hypodermically. Dis- solve eight grains in a hypodermic-syringeful of warm water, and inject the whole into a fleshy part of the arm or thigh. Germain See highly commends this use of antipyrin. CHAPTER X. APPENDIX. A more particular mention of the principal agents of the anti-neuralgic medication seems required; they will be considered in this supplement. I. Narcotics. These remedies are nerve-stupefiers. If they fail to com- bat the cause of the neuralgia, they at least attenuate the pain- ful paroxysms by an elective action on the sensory centres, whose erethism they calm. The remedies to be considered under this head are : Opium, belladonna, Indian-hemp, hyos- cyamus, piscidia, gelsemium, and aconite. OPIUM. Opium. — While opium is not the best analgesic for neural- gic pains, and is certainly to be avoided as far as possible, it is the most powerful antagonist of pain that we possess, and after all other remedies have failed, the physician is obliged to fall back on this incomparable anodyne. Mode of Action. — Opium is a true protoplasmic poison. In proper doses, it suspends those molecular changes on which life depends. It acts on the cortical cells of the cerebrum as a stupefier, diminishing reflex excitability and allaying pain. Indications and Contra-indications. — In all the cerebro- spinal neuralgias, opium or its alkaloids may be indicated. Certain idiosyncrasies, however, may forbid its employ, as where nausea and vomiting, vertigo, epigastric anguish, dys- uria, attend the therapeutic use of any opiate. Some patients are so prostrated by opiates that they will suffer almost any degree of pain rather than resort to them. According to Vanlair, opium is better adapted to the treatment of the visceralgias thau the cerebro-spinal neuralgias, and acts better in lymphatic than in nervous subjects. Modes of Administration and Doses. — Opium may be employed externally in the form of liniments, ointments, and plasters. The linimentum opii contains equal parts of lauda- num and opodeldoch. The emplastrium opii has opium and Burgundy pitch. In the French Codex is a glycerite of mor- phia: 2 grains of morphia to an ounce ot glycerin. All these may be used for local effect, or the aqueous extract may be — 108 — rubbed up with water and applied in compresses. The decoc- tion of poppies has sometimes been used as a local anodyne. It must be confessed, however, that no great benefit can be obtained from these external applications. Crude opium is seldom given internally for neuralgias, and the same may be said of the fluid preparations. The vinegar of opium (English black drops) has a certain reputation in gastralgia; dose, 10 drops. The only alkaloid of opium deserving of mention in con- nection with the therapeutics of neuralgia, is morphine. This alkaloid may be given internally in the dose of a quarter of a grain, every hour or two, until the pain is relieved. The bet- ter method of administration, however, is the hypodermic method. One-fourth grain of morph. sulph., or ten minims of Magendie's solution may be injected into the cellular tissue of a fleshy part of the arm ; the effect will be far more speedy and lasting than when the alkaloid is given by mouth. Moreover, only about half the ordinary dose is needed when the morphine is injected, a quarter of a grain thus introduced having about the same effect as halt a grain taken by the mouth. Morphine may advantageously be combined with atro- pine for hypodermic use, as in the tablet triturates sold by the apothecaries. There is no need at the present day of insisting on the advantages of hypodermic medication; all practitioners recog- nize the superiority of this method over every other when it is a question of obtaining the maximum of effect with the mini- mum dose. Nor is it necessary to speak of the endermic method, now superseded by the hypodermic. Chlorodyne — Chloranodyne . — How to obviate the injurious after-effects of morphine when this alkaloid is administered for pain, has long been the study of physicians. Experience has taught many a practitioner that the combination with aromatic stimulants, as peppermint, lavender, cajaput, was often useful; many claimed that they had found in capsicum and ginger the desideratum; some wanted the advantage of a union of the opiate with alcohol, chloroform, or various nar- cotics and sedatives, such as belladonna and hydrocyanic acid. When I was an interne of the Montreal General Hospital, in 1864, Collis Browne's chlorodyne was much in vogue. Al- though its composition was uuknown, no one doubted that the active anodyne ingredient of this preparation was morphia. — 109 — In my subsequent private practice I was much in the custom of resorting to this chlorodyne (notwithstanding its high cost) when obliged to give morphia to patients who were in the habit of experiencing unpleasant results from the drug when given alone. I found it, however, an uncertain preparation, apt to spoil by precipitation of the molasses, which was the vehicle of the active ingredients; and about seven years ago I abandoned the Collis Browne Chlorodyne for Gilman's, the formula of which I found in the Boston Medical and Surgical Journal: IJ Chloroform, 3 ij. Glycerine, |ii. Alcohol, ?ii. Spts. peppermint, 3 ij, Acid hydrocyanic dilute, 3 ij. Tincture capsicum, 3 ij. Morph. sulph., gr. viii. Syrup, 5 iii- M. The dose of this preparation for an adult is one teaspoon- ful, which contains one-eighth grain morphia, The above combination is a good one, the ingredients being all held in solution, and the taste being far less un- pleasant than the nasty, tarry-looking compound generally sold under the name of chlorodyne. Despite the fact that I have long used, and almost daily in my practice, the Gilman chlorodyne, I find in the prepara- tion devised by Parke, Davis & Co., and sold under the name of Chloranodyne, a more efficient and elegant combination. I do not hesitate to say that nothing as yet made is quite so sat- isfactory. The dose is about the same as the old Collis Browne article, while the action is more certain. The small- ness of the dose (15 to 20 drops) is an advantage over the Gil- man chlorodyne, which must be given in drachm doses and is about equally expensive. The formula of Parke, Davis & Co.'s chlor-anodyne shows each gramme to contain the following ingredients in the quantities indicated: B Morphia muriate oo£o grm. Tinct. Cannab. Ind 0800 grm. Chloroform 1350 grm. Oil of peppermint 0025 grm. Tinct. capsicum 0025 grm. Hydrocyanic acid dilute 0170 grm. Alcohol 30C0 grm. Glycerine 4570 grm. — no — BELLADONNA. "The and neuralgic action of belladonna," says Van- lair, "is not dependent on its physiological effects, for belladonna is an excitant of the central cells, and its stu- pefying properties do not appear till after an intense and pro- longed excitation. If we were to consider pain as a simple exaltation of the sensibility, the efficacy of belladonna in the treatment of neuralgias would be absolutely inexplicable. * * * But pain, not being hyperesthesia, there is nothing to prevent belladonna, even when it does not exert its stupefying properties, from acting against the algesic element and tri- umphing over it. Belladonna is even superior to opium in cer- tain respects. It not only manifests an incontestable anodyne action, but it also exerts anti-neuralgic properties which opium does not possess to the same degree." Vanlair thus expresses his preference for belladonna over the other narcotics as an anti-neuralgic, and whatever we may think of his explanation he here seconds views before uttered by Behier, Courty, and Trousseau The kind of neuralgias which he thinks most amenable to belladonna are "the idiopathic, and especially those affecting nerves placed superficially. Such are the facial neuralgias, and es- pecially those of the supra-orbital branches; the temporal neuralgias yield equally well, but neuralgias of the infra-orbital nerves are more stubborn." * * * In the above neuralgic affections, he would rely much on local applications of bella- donna. The dose of the alcoholic extract and the powder of the leaves is one-fourth of a grain twice or three times a day. Outward applications over painful regions of the extract, rubbed up with water, or of cataplasms of the leaves, are sometimes of unquestioned efficacy. Trousseau counselled to make a paste of the extract with a few drops of water, and rub it over the painful part. He has found this treatment ol efficacy in sciatica. Vanlair prefers an ointment made by rub- bing up half a drachm to a drachm of extract of belladonna in an ounce of lard, vaseline, or glycerite of starch. Trousseau's Treatment of Migraine. — He makes a quantity of pills of the extract of belladonna, each containing one- sixth of a grain ; one of these is given every hour (cautiously) till the complete disappearance of the pain, or till some vertigo is felt. Atropine, the alkaloid of belladonna, has been much — Ill — given in neuralgia.* The dose would be one-hundredth of a grain, which should not be repeated more than three times in the twenty-four hours. Atropine is preferably given by the hypodermic method; one of the j-foy grain tablet triturates being dissolved in fifteen drops of water and injected subcu- taneously. In obstinate idiopathic cerebro-spinal neuralgias it will not do to rely on this alone; the atropine works more speedily and effectually if combined with morphine. Thus: fy Sulphate of morphine, % grain. Liquor atropia, 2 drops. Cherry laurel water, 20 drops. M. For one hypodermic injection. Or the tablet triturates may be employed. Each contains one-fourth grain of morphia, and one-hundredth of atropia. It is hardly necessary to add that belladonna is not in quite the same repute in which it was held some years ago. before the antithermic analgesics and caffeine were introduced into therapeutics. The dose both of belladonna and of its alkaloid required for the complete relief of pain can hardly be regarded as a perfectly safe dose; at any rate this powerful drug demands skilled and experienced management for its success- ful employ. CANNABIS INDICA— (HASHISH— INDIAN HEMP.) Indian hemp, much inferior to opium as an analgesic, has been found serviceable in some cases of migraine. Ring- er declares that no single drug has been found so useful in this common neuralgic affection. It should be given for weeks and even months in doses of ^ to x / 2 grain twice a day. Greene, an English practitioner, was one of the first to make of hashish a sort of specific against migraine. He gave of the alcoholic extract of Indian hemp from 0.02 to 0.03 (/4 to % g ram ) before each meal; after several weeks he in- creased the dose somewhat, and continued the treatment for three months. It is especially in the migraine of young peo- ple that Indian hemp does good. Seguin, in the Medical Record (vol. xii, p. 774, 1877), recommends the same treatment, and insists that the doses shall be given with the greatest regularity. The principle is ♦According to Anstie, atropine is particularly useful in glaucomatous neuralgia, and in neuralgia of the pelvis. , to keep the nervous system steadily under a slight influence of cannabis for a long period of time. He says that cannabis is nearly as efficacious in migraine as the bromides are in epi- lepsy. Male patients can generally begin with half a grain, and it is well to give them three-quarters of a grain in two or three weeks. Lothrop, in a paper read before the Buffalo Medical Club {Medical Record, vol. xix, p. 99), advocates Greene's and Seguin's method. It is stated as a matter of course, that at first no appreciable effect is observed, and that not until the use of the remedy is persevered in for many weeks will the patient find a decided diminution in the severity and fre- quency of the attacks Lothrop gives a fourth of a grain of the alcoholic extract before each meal for the first fortnight, then a third of a grain for the second fortnight, to be aug- mented to half a grain at the end of four weeks. Corrigan re- ports favorable results from tincture of Indian hemp in tic douloureux; he employs the tincture in the dose of 8 to 30 drops. HYOSCYAMUS. This narcotic agent is little employed in neuralgia, the analgesic effects obtained from safe doses of the various phar- maceutical preparations of henbane being too feeble. Meg- lin's pills, which have considerable repute in neuralgia contain extract of hyoscyamus. The composition is as follows: IJ Oxide zinc, Ext. valerian, Ext. hyoscyamus, aa gr. j. For one pill. To be given three times a day. Hyoscyamus leaves, bruised and steeped and applied as a cataplasm to the skin in superficial neuralgias, have been vaunted by Trousseau and Pidoux. CONIUM MACULATUM. The same remarks are applicable to conium or hemlock. The succus conii, however, anciently had a reputation for the cure of tic douloureux, in the dose of 30 drops three times a day. The conium plaster, and cataplasms of hemlock leaves have been recommended for outward application. — n3 — STRAMONrUM. The leaves of stramonium have been similarly used as an application to painful parts. A good way is to mix a quantity of the dried and pulverized leaves with the ingredients of an ordinary poultice. PISCIDIA F.RYTHRINA. This plant is known under the name of Jamaica Dogwood. Introduced into medicine as a hypnotic and narcotic, it has- been found to possess analgesic properties similar to gelsemium. It is especially in rebellious facial neuralgias that it has been prescribed. Preparation and doses. — The fluid extract is alone pre- scribed in the United States, in the dose of a teaspoonful. GELSEMIUM SEMPERVIRENS. This plant, known as the yellow jasmine, has real analgesic properties, and has been especially useful in facial neuralgias and in hemicrania. Perhaps its efficacy is more marked in dental neuralgia than in any other form of pain. Gelsemium is a direct paralyzerof the sensory conductors in the cord. A severe case of cervico brachial neuralgia which came under my observatioa in 1876-1877 was markedly benefited by this drug. On numerous occasions I saw violent paroxysms yield to five drop doses of a saturated tincture. This patient (a young lady of highly neuropathic organization) was kept in comparative comfort for more than a year by the gelsemium. The dose is from 2 to 10 drops of a saturated tincture, or of the fluid extract, which may be cautiously repeated every hour or two till abatement of the pain is produced. We do not believe that aconite in the form of tincture or extract,* is of much service in neuralgia, but there is no doubt as to the utility of its active principle aconitia. * The extract of aconite is, however, a principal ingredient of the somewhat famous neuralgic pills of the late Professor Gross, of which the formula is as follows: 3 Ext. aconite, qr. y±. Quiniae sulph., gr. ij. Acid arsenios, gr. 1-20. Strychnia, gr. 1-20. Morphia, gr. 1-20. M. One pill. 8 MM — H4 — Aconitia (which exists in the root of the aconitum napellus in the proportion of about one drachm to twenty-six pounds) has been made the subject of special study by the late Prof. Gubler. whose monographs on this medicament are of great practical utility. Gubler was one of the first to insist on the importance of this remedy in the treatment of trigeminal neu- ralgia. ?"-L~, Aconitia is found in commerce under two distinct forms; the amorphous and the crystallized. The latter, which is some- what stronger and more reliable, is the best known, and is generally prescribed under the name of Duquesnel's aconitia. Not to dwell on the toxic effects of this powerful alkaloid, which is only safe in very minute doses, we may sum up its therapeutical actions by the observation that it seems to have a special selective influence on the extremities of nerves of sensation, which it paralyzes. This elective affinity is especi- ally manifest in the case of the fifth pair of nerves. The beneficial effects of this medicament in neuralgia, in facial neuralgias in particular, have been attested by a multitude of observers, among whom we may mention Oulmont, Seguin, Franceschini, Merck, and Laborde.* Gubler is fond of narrating an incident which occurred in his practice. It concerned a patient on whom Nelaton had prac- ticed resection "of all the branches of the tri-facial " (!). The pains continued to be just as atrocious and just as persistent as ever. The patient, reduced to despair, and ready to com- mit suicide, was treated by Gubler with aconitia. Seven milli- grammes a day of Hottot's aconitia were administered in gran- ules with the most marked relief, and by perseverance in this remedy a complete cure was effected. Laborde, in the Journal de Therapeutique, publishes re- ports of six cases of neuralgia mostly of the fifth pair, in all of which marked benefit was received from aconitia; in some the benefit was permanent. In all these cases the medicine was given by mouth. He makes use of the granules of Du- quesnel, containing one-fourth of a milligramme. One gran- ule is a sufficient commencing dose, and he advises that the dose should not be repeated under four hours. Generally the second granule will give relief, if the first fails to benefit. *See especially the exhaustive articles of Laborde in the Journal de Thtrapeutique, and Tribune Medicale, 1881. — u5 — A safe and efficient way, which we have often tried, is the following, which is in accordance with the directions laid down by Dujardin Beaumetz: Duquesnel's aconitia is ordered — the one-fourth of a milligramme granules. Of these the patient is ordered to take one granule every three hours, till eight have been taken during the twenty-four hours. It is seldom that there is any occasion to go any further. Generally the second or third dose causes complete disappearance of the pain. Given in this way, we do not exceed two milligrammes a day. If this dose not not relieve, it is vain to push the remedy further. Sometimes after the second or third granule, a little tingling of the tongue and pricking of the skin of the face, with constric- tion of the mouth are experienced. Patients sometimes com- plain that their head feels " hoop-bound " for a time. There is no doubt about the superlative excellence of this medicament in all so-called congestive neuralgias, and we have notes of obstinate cases of sciatica which have proved amen- able to treatment by aconitia. It is one of the remedies that should be first tried in severe sciatica and lumbago aftigore. Even in the case of symptomatic facial neuralgias, as well as protopathic, the pain is often alleviated by aconitia, as Laborde has shown.* II. Anaesthetics. The only anaethsetics that will be here mentioned are chloroform, ether, nitrite of amyl, chloral, cocaine, bromide of potassium, and menthol. These remedies abolish sensibility, but their action is fugacious, and temporary, therefore they are only to be resorted to as palliatives, and as adjuvants to the other analgesics. * From an article by the author in the Medical Record, July 14, 1883. The following formulae are taken from the Formulaire Pratique, by Du- jardin-Beaumetz: IJ Liquor Aconitice (Turnbull), Amorphous aconitina, 1 gramme (15 grains). Alcohol, 8 grammes ( 3 ii). M. For frictions over the face in prosopalgia. ^ Sulphate quinine, o gr. 20 centigrammes, Crystalized nitrate of aconitia, o— % milligramme, Ext. cinchona q. s. for one pill. Take one to three of these pills in the 24 hou * s — n6 — Chloroform, Ether. — Anaesthetics sometimes render ser- vice in alleviating the violence of neuralgic paroxysms. There are cases where every remedy seems to fail; the patient is racked with an atrocious migraine, tic-douleureux, or cervico- brachial neuralgia. Morphine has been given hypoder- mically up to the point of danger, or very near to this point, and still the persistent, boring pain continues, with frequent stabs and darts, and the poor patient can get no rest. Here the free inhalation of ether will for a time attenuate the distress. The effects are generally fugitive ; nevertheless, the anaesthetic may be "the last straw that breaks the camel's back," and the paroxysm may yield to a few whiffs of ether or chloroform. Of the two, chloroform is the most prompt and thorough in its action, producing less nausea and vomiting afterwards, but ether is generally preferred, being safer. Lately, deep, parenchymatous injections of pure chloro- form (20 to 30 drops), have been recommended (Roberts Bar- tholuw, Ernest Besnier, Dujardin-Beaumetz, etc.), in sciatica. The needle should be plunged deeply into the muscular inter- stices. These injections are painful, but frequently markedly efficacious I have injected the amount of a teaspoonfnl of pure chloroform into the deltoid in a case of cervico-brachial neuralgia; the result was satisfactory. * * * Chloroform has been also used locally as a liniment, over painful regions, and with good results. One of the uses of sulphuric ether may be here men- tioned. If sprayed over a painful region — a common hand atomizer, such as is made by Codman & Shurtleff, Boston, which throws a continuous spray, being used for the purpose — an intense refrigeration is produced, which benumbs the nerves and for a time allays the pain. These pulverizations are of considerable use in dermalgia, in occipital, temporal, and inter- costal neuralgia, and I have known them to be used with bene- fit in sciatica, NITRITE OF AMYL. Nitrite of amyl has been used with some success by in- halation (three or four drops on a handkerchief or the palm of the hand) in facial and intercostal neuralgias and in hemicrania. Most authorities, however, place very little reliance on it. From the vaso-motor paralysis and the congestions which it occa- sions, it is likely to do more harm than good. Vanlair thinks it of remarkable efficiency in sympathetic headaches. CHLORAL. Chloral has but feeble analgesic properties. It is never given in neuralgias of any kind except as an adjuvant to mor- phine, to calm reflex excitability and produce sleep. The dose is from 10 to 30 grains. For external use a liniment is prepared cared the cam- phor-chloral liniment, by rubbing gum camphor with hydrate of chloral. An oily liquid is the product, which, when rubbed over the seat of pain in pleurodynia, cervico-bracbial neural- gia, lumbago, etc., causes first some smarting and redness, then considerable local anaesthesia. CROTON-CHLORAL. This substance seems to possess analgesic properties superior to thore of chloral. Per contra, it is not so good a hypnotic. It has given good results in facial neuralgia and in migraine. The dose is five grains; Seguin counsels to give 15 grains every hour, for four doses, in migraine. Not much can be expected of this remedy, although Dr. B. W. Richardson (Braithwaites Ret., Part 83. p. 22S) speaks highly of its employment. He says: " Looking upon neural- gia as a form of vascular spasm in tracts of nerves (?), we have a clear idea of the reason why antispasmodics are so useful in some forms of this disease. * * The alcohol in port wine has for this reason obtained its reputation for the relief of tic. In croton-chloral combined with quinine we have an instant remedy more effective than alcohol. * * The formula is: Croton-chloral, gr. ii. 8uinine, gr. ii. lycerin, as much as suffices to make a pill. The pill to be taken when the attack threatens, and to be re- peated every two hours till relief is obtained." BROMIDE OF POTASSIUM. Peter relates a case of cure by bromide of potassium of an epileptiform neuralgia of the face; the patient, aged 62 years, had more than 200 crises in the twenty-four hours, and could only get relief from his pain by taking half-drachm doses of bromide three times a daw* Bull de Therap., Oct., 1876, p. 337 (cited by Vanlair). — n8 — Anstie* would limit its use mainly to a class of neuralgics, especially women, in whom a certain restless hyperactivity of mind, and perhaps of body also, seems to be the expression of Nature's unconscious resentment of the neglect of sexual func- tions. Bromide of potassium, on the other hand, is injurious in young men exhausted by masturbation. OIL OF PEPPERMINT — MENTHOL. Menthol is a solid crystallizable substance deposited from the oil of peppermint. It is also found in commerce under the name of Japanese oil of peppermint. Oil of peppermint and menthol are supposed to have anodyne properties when applied externally, but probably their therapeutic action de- pends on their rapid and complete evaporation. Oil of pepper- mint has been much used as a liniment in superficial neural- gias. A solution of menthol in alcohol, and menthol cones, have also been found of some use, especially in migraine. COCAINE. Cocaine is an alkaloid obtained from the leaves of ery- throxylon coca. The marked local anaesthetic effects which have been obtained from this agent, and which have of late ren : dered it so indispensable in ophthalmic surgery, and in minor surgical operations, have led to its employment as a topical application in neuralgias. Unfortunately its action is too su- perficial and too transitory. A strong solution rubbed over painfu 1 nerves, or applied on tampons and compresses — in tic douloureux, in migraine, in intercostal and other peripheral neuralgias — gives but momentary alleviation. Hypodermic injections, each injection consisting of a syringful of the two per cent, solution of the hydrochlorate of cocaine — have been used in neuralgia, with some benefit. In one instance of severe cervico brachial neuralgia, where I frequently resorted to these injections, the anagelsic effect was speedy, and lasted several hours. At the same time, some ob- servers have recorded among the unfavorable symptoms attending the subcutaneous use of cocaine, nausea, and even alarming syncope. f * Anstie, " On Neuralgia," p. 241. + Dujardin-Beaumetz, New Medications, Am. Ed., p. 300. — II 9 — From my own limited experience I should say that if the patient be kept in a recumbent position, there is little danger of syncope, and that the occasional use of cocaine subcu- taneously in neuralgia, as a substitute for morphine, is advan- tageous. III.— Neurosthenic or Alterative Medicaments. The medicines above enumerated do good chiefly by an action directed to the element pain, and their effect is more or less transient. Moreover, some of them, as opium,' are objec- tionable in that the organism is likely to be in a worse condition after their use than before. He who is obliged constantly to resort to morphine injections is almost certain to become a morphiomaniac. Nor can it be said that the constant use of belladonna, cannabis, or any other narcotic is unattended with injury to the organism. Perhaps the same objection is not (at least to the same extent) applicable to a class of medicines which I may call neu- rosthenic or alterative medicaments, which are designed to strengthen the nerve element. Of this class I shall notice only the principal : Arsenic, quinine, salicin, iron, phosphorus, chloride of ammonium, strychnia, and cod-liver oil. ARSENIC. Perhaps no remedy is more prized at the present day in anaemic neuralgias than arsenic. This medicine, says Anstie, "from its singularly happy combination of powers as a blood tonic, a special stimulant of the nervous system, and withal, as a special opposer of the periodic tender. cy, must be regarded as one of the most powerful weapons in the physician's hands, and although it seems to act best in the neuralgias of the vagus and the fifth, there is a possibility of its proving the most effect- ive remedy in almost any given case which may come betore us." Anstie has seen especially good results from arsenic in the paroxysms of angina pectoris; from his description it would appear that he refers to those purely neurotic forms of cardiac pain called by Huchard false angina pectoris. Cohen* has administered arsenic with success to persons affected with all kinds of cerebro-spinal neuralgias, facial, sciatic, intercostal, etc. Sciatica has been the most refractory to this remedy. Leared has found it very efficacious in gastralgia. * Journal de Medicini de Bruxelies, 1865. (Cited by Vanlair). 120 Doses and mode of administration. — I, Fowler's solution, three drops, gradually increased to eight or ten, after each meal. 2, Arsenical pills -^ to -^j- grain; one pill three times a day. The granules of Dioscorides and the Asiatic pills are ancient preparations. Fowler's solution can generally be tol- erated if any arsenical preparation can be taken, but in some patients arsenic in every form is contra-indicated, owing to gastro-intestinal irritability. QUININE. Quinine has a great reputation in the treatment of neural- gia, a reputation which is largely due to its success in those forms of neuralgia which are of malarial origin. There is no doubt as to its utility in these latter neuralgias. The dose should be large, from 10 to 15 grains to an adult; this may be given to best advantage a few hours before the paroxysm; Stille says six to eight hours. Numerous examples of the efficacy of quinine in neural- gia of the ulna, sciatic, crural, and other nerves have been given by Dr. Hanfield Jones.* A case of femoro popliteal neu- ralgia was cured by Dupre with quinine after other remedies had failed, and Brodie successfully treated neuralgia of the inferior dorsal nerves by the same remedy. f Anstie ascribes to it a special value in the treatment of ophthalmic neuralgia; Vanlair finds it indicated particularly in neuralgias of the face and neck, and regards the existence of marked periodicity in the paroxysms as a leading indication for quinine. It is better to give quinine in substance in a little water and made soluble by a drop of a mineral acid, than in pill form. If administered in an infusion of coffee, its bitterness is partly disguised. Graves reccommends the addition of a few drops of chloroform to the mixture, which is thus rendered more pala- table. SALICIN. Salicin is a glycoside obtained from willow bark. It has been used in neuralgia chiefly on the recommendation of Dr. Maclagan " The cases," he says, "in which I have found salicin to be of most service are those in which the pain comes on in periodic exacerbations, and in which quinine either fails * Lancet, June, 1865, (quoted by Stille.) t Stille, Therapeutics and Materia Medica. to do good, oris for some reason inadmissible." He has given it chiefly in facial neuralgia The dos^ must be large; twenty grains every three hours till eighty grains are taken, or till the pain subsides. {Practitioner, Nov., 1877, p. 321.) IRON. It is not surprising that iron, which occupies such a large place in the therapeutics of anaemia and debility, should be regarded as a remedy of prime importance in neuralgia, a disease of anaemia and debility; and, doubtless, as an adjuvant to good food, exercise in the open air, and other fortifying measures, iron may render important service in the treatment of neuralgia. Anstie speaks highly of the tincture of sesquichloride of iron in the anaemic neuralgias. He thinks that besides its effects on the blood, it has a marked and direct influence on the nerve centres which is different from anything which one observes in the action of any other preparation of iron.* The effect which it produces in the anaemic neuralgias, more es- pecially of young women, is something quite peculiar. He recommends the combination with strychnine, ten minims of the tincture of the chloride with one-fortieth of a grain of strychnine, and alludes to a severe case of frontal neuralgia that was markedly benefitted by this combination. (The dose is an exceedingly unpleasant one to take, and the tincture of iron doubtless has a deleterious action on the teeth). Another favorite iron preparation is the saccharated car- bonate, of which the dose is a scruple three times a day. Hutchinson affirms that he has cured several cases of temporo-facial neuralgia by the sub-carbonate in large doses. A teaspoonful may be given of this red iron powder stirred into a little water, three times a day, The phosphate and pyrophosphate (especially the latter) are eligible preparations. In chlorotic patients with delicate stomachs the ammonio-cit- rate will sometimes suit better than any other form of iron. Among the useful non-official preparations is the dixit of phosphate of iron, quinia and strychnia; dose, a teaspoonful three times a day; the elixir of lactophosphate of iron; the fol- lowing formula of Dr. W. A. Hammond is a powerful tonic combination: 1 Anstie on Neuralgia, Am. Ed., p. 229. 122 3 Pyrophosphate of iron. 3 i, Quinine sulph., 3 ss, Strychnine, gr. j. Acid phosphoric dilute, Syrup of ginger, aa 1 ij. M. Dose, a teaspoonful three times a day. CHLORIDE OF AMMONIUM. Dr. Eben Watson has represented this drug to be an effic- ient remedy for neuralgia of the fifth pair of nerves, and he refers to two cases in which the pain ceased within a few min- utes after it had been given.* Anstie also speaks favorably of its use in migraine. The dose is 20 grains dissolved in a large quantity of water. Muriate of ammonia is a very disagreeable medicine to take. The addition of a little licorice renders it somewhat more palatable. STRYCHNINE. If nux vomica or strychnia has any efficacy in neuralgias, it is by improving the circulation of the blood and the tone and nutrition of the nerves on which it acts. It is principally in the facial neuralgias and in gastralgia that it proves beneficial. Anstie speaks of the utility of strychnia in "cardiac neuralgia," though he gives the precedence to arsenic. The dose of strychnia would be from -fa to -fa grain, ad- ministered in pill form. The liquor strychnia may be given in doses of from 5 to 10 drops. Of nux vomica, one grain of the powder, one-fourth grain of the extract, or five drops of the tincture may be given for a dose. PHOSPHORUS. The use of this drug is altogether empirical. It has been given in the pill form, each pill containing -^ grain. The phosphorated oil is not a very eligible preparation, though it may be administered in capsules, each capsule representing one-six- tieth of a grain, to be taken after meals. Phosphide of zinc is an excellent form for the administration of phosphorus; pills y| grain; dose, one pill after each meal. Thompson in Eng- land, and W. A, Hammond in this country are the principal advocates of the phosphorus treatment of neuralgia. * Stille, Therapeutics and Materia Med., Vol. II, p. 839. — 123 — COD LIVER OIL. There is no question as to the value of fatty foods in neu- ralgia, although patients are often averse to them, and many with delicate stomachs are unable to tolerate or digest crude fats in any form. The neuralgic, as a rule, are lean and anae- mic. The appetite is poor and assimilation is imperfect. The pains from which they suffer are often the outcry of starved nerves for more blood and better blood. If we would do these patients good, we must do something besides alleviating the pain for the time being. They must be built up by generous diet of which flesh and fats form a considerable proportion. As nerve substance is composed chiefly of albumen and fat, we see the importance of an abundant supply of these materials in the food. But what can be done in cases where the appetite is absent — where the stomach loathes the kind of food that is needed ? As far as possible, all the resources of hygienic therapeutics must be called into exercise; pure air, out door exercise, moun- tain climbing, horseback riding, rowing, walking, gymnastics. Or if the patient be bedridden, massage and electricity may be tried, with feeding according to the Weir- Mitchell method. Such fats as can be asr imilated must be taken: sweet cream, salad oil, above all, cod-liver oil. In addition to the ordinary fare, a cup of beef peptonoids between meals, and in 'the night time. If cod liver oil in its purity cannot be borne, possibly some of the emulsions may suit, especially that with malt extract. "It is" says Anstie "surprising what can be done in in this way by perseverance and tact. * * * * Nothing is more singular than too see a girl who was a peevish, fanci- ful and really very suffering migraineuse brought to a state in which she will eat spoonful after spoonful of Devonshire ci earn, and at the same time lose her headaches, lose her sickness and develop the appetite of a day laborer." IV. Modifiers of the Nervous System. Analgesics — Antipyrin. Of all the analgesic medicines which have ever been pre- scribed for the neuralgic affections, antipyrin seems to have been the most uniformly successful, as well as the most harm- less. Not even opium or morphine can be excepted, for opium does not more speedily relieve pain than antipyrin in cases — 124 — for which the latter is adapted, nor are the effects more per- manent; besides at what cost is the analgesia of opium some- times obtained. History. — Antipyrin was discovered in 1885 by Knorr, of Erlangen, Germany. It is one of the products of the destruc- tive distillation of coal tar. Antipyrin is a derivative of oxy- menthl quinizine, which is obtained by the reaction of aceta- cetic ether on phenylhydrazine; if to this oxymethyl quinizine there is introduced a new methylic group, methylated oxy- methyl quinizine is obtained, to which Felehne gave the name of antipyrin. It is a grayish white powder, slightly bitter to the taste, and quite soluble in water. The chemical formula of antipyrin is C 20 H 10 N 2 O2. The manufacture of antipyrin has unfortunately fallen into the hands of a monopoly, which has patented the name in all civilized countries; hence the price of this drug has been relatively high. It is not, however, maintained, that the pro- cess of its manufacture is in any sense a secret. Physiological Action. — While antipyrin in large doses is speedily fatal to animals, producing convulsions both clonic and tonic, and paraplegia or general paralysis, in smaller, medium doses its action is characterized by diminution of the sensory perception, and reflex excitability.* G. See, and Chouppe have demonstrated that antipyrin lessens the excito- motor properties of the cord, and that it is also a sedative to the cerebrum. This physiological action gives hints as to the modus operandi of its therapeutic action in cases characterized by sensory hyper-excitability. We are not here concerned with antipyrin in its relation to fever, and those marked anti-thermic effects which make it perhaps our best antipyretic. Therapeutic Eviploy. — After antipyrin had been for more than a year employed in fevers, it was found to be of prime utility in combating the element pain. Nor is it strange that a remedy which lowers fever-heat by depressing the activity of the heat centres, should do good in other conditions dependent on abnormal nervous activity. It was found to be of benefit in acute rheumatism, by alleviating the pains in the joints. Professor Germain See was one of the first to point out the analgesic properties of antipyrin in all other affections where pain is a predominant symptom. He reported a first series of *Dujardin-Beaumetz, Dictionnaire de TherapeutiQue. — 125 — observations, fourteen in number, relative to pains of the head ; of these, four were cases of facial neuralgia; six were obstinate cases of migraine; four were the headaches of grow- ing children. In all, antipyrin caused the pains rapidly to cease. A second series of observations pertained to eighteen cases of neuralgia or neuritis, and of muscular pains; to five cases of sciatica; to several cases of painful zona, of lumbago, etc. In all these, antipyrin proved efficacious. Wolff has found antipyrin promptly beneficial in mus- cular rheumatism and pleurodynia; Ungar speaks favorably of its effects in hemicrania, and in those headaches which accom- pany ophthalmias; while Lepine and Germain See have found severe cases of the douleurs fulgurantes of tabes dorsalis amenable to the same remedy Professor See has also had good results from antipyrin in angina pectoris. Otalgia (earache) has been treated with success by anti- pyrine (Gomprez), and lumbago, whatever be its origin, ac- cording to Germain See, gets well immediately after two sub- cutaneous injections of five grains of antipyrin, with forty-five grains taken internally. In visceral pains (hepatic, nephritic, gastro-intestinal colic, uterine colic). Germain See has never known antipy- rin to fail. His treatment is a hypodermic injection of fifteen grains, aided by fifteen grain doses by mouth four times a day for eight days. In painful dyspepsias, he associates antipyrin with bicarbonate of soda, eight grains of each, three times a day at meal times. In painful menstruation he gives a lave- ment containing fifteen grains of antipyrin. Mode of Administration and Doses. — Antipyrin, being soluble, is readily administered in water, or in alcohol and water. Simple elixir is a good excipient. The dose is from ten to twenty grains. Ten or fifteen grains may be given every hour or two till six doses have been given. Antipyrin may be safely administered in hypodermic injections. Seven or eight grains are dissolved in one or two cubic centimitres of water, and the whole injected under the skin. A little smarting fol- lows the injection, which soon passes off. Antipyrin sometimes causes a scarlatiniform rash, which, however, is never serious. Now and then a little nausea or vertigo attends its medicinal use, but it never causes the depression and cyanosis which frequently attend the use of acetanilid. 126 TONGA. TT^r! Tonga is a new remedy for neuralgia, introduced to the profession by Sidney Ringer and William Murrell. of London, in 1880, and obtained from the Fiji Islands. It has long been used by the South Sea Islanders for all cases of neuralgia. It is employed in the form of an alcoholic extract, in the dose of a teaspoonful every few hours. Its effects seem to be very sim- ilar to those of guarana. A good preparation of tonga is made by Parke, Davis & Co. GUARANA — CAFFEINE. Guarana, and its alkaloid, caffeine, are somewhat famous anti-neuralgic remedies. Guarana was first brought into notice about twenty years ago. It is the product of a Brazilian plant, the Paullinia sotbilis. Caffeine exists in guarana in the propor- tion of about 5 per cent. The discovery of caffeine in four plants belonging to separate natural families, namely: the coffee and tea plants, the Paraguay tea, and the Paullinia, is an interesting result of recent chemical investigations.* Physiological Action. — Guarana and its alkaloid act much like tea, coffee, and cocoa, causing at first excitation, then diminution of the functions of the cerebrum and spinal cord. Beaumetz sums up the principal effects as follows:f 1, cerebral excitation; 2, complete paralysis of the sensibility; 3, tetanic spasms and convulsions; 4, death. " These poisons, then, seem to paralyze the posterior columns of the spinal cord, and the entire system of sensory peripheral nerves, having no action on the anterior columns and motor nerves." These are the principal points of interest in connection with the anti-neuralgic uses of guarana and caffeine. It is evi- dent that the analgesic action, which is the one sought for, can- not be dependent on the paralyzing action of the drug on the sensory nerves and centres, which follows large doses. Therapeutic Uses. — It is especially in migraine that guar- ana or its alkaloid have proved beneficial. Nevertheless, facial neuralgia has proved amenable to its use, and the supra-orbital and infra-orbital headaches.:}: Common sick- headache, so gen- erally referred to gastro hepatic derangement, is often marked- * Wood & Bache, U. S. Dispensatory. t.Dujardin-Beaumetz, Dictionaire de Therapeutique. % Vanlair, Loc. Cit. — 127 — ly relieved by guarana, and I have witnessed one case of cer- vico-brachial neuralgia, which for more than three years was kept in abeyance by this drug.* Doses. — The dose of guarana is fifteen to thirty grains; that of caffeine, three to six grains. The former may be taken well stirred in a little warm water, as a wineglassful. The caffeine, which is generally given in the form of a citrate (the citrate is, however, merely a mechanical combination of caf- fein and citric acid, and not a true salt) may be taken in a spoonful of syrup, simple elixir, or water. The dose may be repeated in an hour or two if no result is derived from the first dose. "I know," says Dujardin-Beaumetz, "a physician who infallibly cuts short his attacks of migraine by the use of one or two grammes of guarana." This has been a frequent ex- perience. I personally know many (mostly delicate females) who were formally martyrs to nervous headaches, and who have for years been made comfortable by an occasional scruple dose of guarana, taken in time to ward off an impending par- oxysm. Dujardin-Beaumetz {Dictionnaire de Therapeutique, art. Guarana) gives the following directions for the administration of guarana: " If the attacks of migraine are frequent (several a month), take every morning two grammes of guarana, half an hour before breakfast, " At the onset of an attack, or, better still, as soon as the precursory symptoms show themselves, take seven and one- half grains in a little sweetened water; wait a quarter of an hour, if the migraine is not gone, repeat the dose." Formulae: R Fluid ext. guarana, 5j. Dose, a teaspoonful p. r. n. The combination of caffeine and guarana is sometimes more efficient than either the one or the other alone: R Guarana in fine powder, 3j. Citrate caffeine, gr. iij. * Med. Record, 1876, page 743: "Dr. H. C. Perkins, the attending physician, had obtained a quantity of Paullinia from Brazil. * * * Some brilliant cures were wrought, and every form of neuralgia seemed to be controlled by the Paullinia powders. In the case of Miss R , the good effects were especially mar iced. * * * Her general health improved. For four years there was almost complete immunity from the pain." 128 Make one powder. To take in a little water when pre- cursory symptoms first appear. This dose will sometimes interrupt an attack that is in progress. Anti-neuralgic Powder. — (Dujardin-Beaumetz.) B Caffein, o gr. to 10 centigr. White sugar, o gr. to 50 centigr. M. One powder, p. r. n. Bamberger's Anti-neuralgic Powder. — B Sulphate of quinine, o gr. to 50 centigr. Citrate of caffein, o gr. 50 centigr. White sugar, 5 grammes. M. Divide in chart, No. vi. Sig. — Take four a day. Syrup of Citrate of Caffeine. — (Hannon.) B Cit. caffeine, 4 grammes. Simple syrup, 120 grammes. M. Sig.— A teaspoonful as often as indicated. ACETANILID^(ANTIFEBRIN). The introduction of acetanilid into therapeutics is due to Cohn and Hepp, in 1886, who first made known its antithermic properties, and called it antifebrin. Acetanilid is obtained by the action of glacial acetic acid on anilin. It is a substance of a beautiful pearly white color, of slightly pungent, not dis- agreeable, taste. Very crystaliizable. It is but very slightly soluble in water. Its chemical formula is C 8 H 9 NO. Physiological Effects. — There is nothing in the physiologi- cal effects of this drug especially suggestive of the analgesic action which medicinal doses exercise in many forms of pain. It is true that large toxic doses are attended with abolition of sensibility, but it has not been shown that moderate doses are anaesthetic. Therapeutic Action. — Analgesic Effects. — Dr. Demieville, of Lausanne, was one of the first to call attention to acetanil- id as a nervous medicament.* He administered it with bene- fit in sciatica, lumbago, neuralgia, in headaches of various kinds, in pains of obscure origin, in dysmenorrhcea, and in the lightning pains of tabes. * Revue Medicate de la Suisse Remaide, June 15th, 1887. — 129 — Since the communication of Dr. Demieville, multitudes of communications have appeared in the medical journals of Europe and this country on the subject. The general verdict may be stated as favorable to the use of acetanilid as an anal- gesic wtihin a limtied range. It is especially in hemicrania that it seems to do good. Some practitioners even seem to think it equal to antipyrin as an analgesic. The dose is about one half that of antipyrin, i. e., ten grains, to be repeated three or four times a day. As acetanilid sometimes causes alarming cyanosis, even in medicinal doses, many practitioners are shy of it. A safe way of administration would be to give five grains every two hours till four or five doses are given. The dose may be given in capsules, stirred in water, or in simple syrup, or elixir simplex. PHENACETIN. Discovered in 1887 by Kast and Huisberg, thephenacetins are three in number: Orthophenacetin. metaphenacetin, and par- aphenacetin. The general formula is as follows: C 10 H 13 N.O 2 . Orthophenacetin and paraphenacetin are medicinal. Phenacetin, like antifebrine and antipyrine, is both anti- pyretic and analgesic; especially the latter. As an analgesic, it has given good results in nervous headaches, m graine, neuralgia cf the trigeminus, sciatica, and the lightning pains of locomotor ataxia. A dose of ten grains ordinarily suffices to allay pain; if this is not sufficient, an- other dose of five or ten grains may be with safety adminis- tered. Its hypnotic properties are also considerable. Experiments made by Dujardin-Beaumetz in Cochin Hospital the past year have shown that the phenacetins pos- sess great medicinal value, are but little toxic, and have all the properties of antipyrin, while being superior to the latter. He administers it in the dose of i l / z grains morning and even- ing, it being a matter of indifference whether ortho- or para- phenacetin be chosen. Phenacetin is but slightly soluble ; may be given in cap- sules or tablets, each containing seven grains. There need be no fear of any toxic action; Beaumetz has administered to ani- mals as much as three grammes per kilogramme of the weight of the animal without causing death. Enormous doses, amounting in all to nearly two ounces, were given in the course of a little more than a fortnight to a patient suffering from tetanus, and recovery was attributed to the free use of 9 MM — 13° — the medicament. There is another advantage which this medi:ament possesses over antipyrin and acetanilid, in being perfectly tolerated by the stomach. Its price is less than that of antipyrin, at the same time, it is more powerful in the same dose; in fact, one gramme of phenacetin produces an effect fully equal to that of two grammes of antipyrin. Prof. Lepine has now employed phenacetin for several months as a " nervine medicament," with satisfactory results, and prefers it to antipyrin and acetanilid. Gaiffe has used it with advantage in the vomiting of phthisis, also in nervous polyuria. It has thus far had no effect in paralysis agitans and chorea, but it markedly benefits whooping cough. Mceller, who has made much use of phenacetin in typhoid fever, states that it does not produce a durable and constant apyrexia; patients soon get accustomed to it, and, moreover, it has no effect on the course of the disease. This clinical authority prefers antipyrin and antifebrin as antipy- retics, but finds phenacetin far superior as an analgesic. I may add that this has been my own experience. Exalgin. Still another compound of apparently considerable medi- cinal value (if we may trust the statements) has been obtained from one of the products of the destructive distillation of coal- tar. It has been experimented with by several members of the Academy of Medicine, who have reported favorably; and in consequence of its marked analgesic properties it has received the name exalgin. At a late meeting of the Societe de Therapeutique, M. Bardet presented samples of this substance and made his report. Exalgin represents, chemically, methylacetanilide, C 9 H 1X N.0 = C 6 H 5 C 2 H 3 ONCH 3 . From acetanilid three methyllic derivatives are obtained; one of these is the sub- stance in question, and is designated Ortho-methylacetanilid It presents itself in the form of fine needles or large white tablets, is little soluble in cold water, more soluble in warm water, and very soluble in spirit and water. Administered to animals this substance acts energetically on the cerebro-spinal axis and speedily kills in the dose of 40 centigrammes per kilo- gramme of the weight of the animal. It causes restlessness and trembling, and the respiratory muscles soon become paral- yzed. In a less dose all sensibility to pain disappears, and the temperature of the body diminishes gradually. — I3 1 — The physiological effects of exalgin are very similar to those of antipyrine, although the former seems to act in a more marked manner than antipyrin on the sensibility, and less energetically on the heat centres. The analgesic effects of exalgin are obtained by a full dose of seven grains; in some instances it may be necessary to repeat this dose in a few hours. The relief from pain is more prompt and more lasting than when antipyrin is given; this is emphatically the case in all forms of neuralgia, especi- ally in the visceral neuralgias. So far, no symptoms of gastric or intestinal irritation have been noted when exalgin has been given for its medicinal effects; its use has never been attended by cutaneous eruptions or by cyanosis. Exalgin is eliminated by the urine, the excretion of which it seems to lessen in diabetic polyuria, at the same time that it diminishes the quantity of sugar in the urine. Neuralgic patients are often benefited by various alco- holic preparations in moderate, tonic doses, as an adjuvant to food and exercise. Wine, ale, and porter are the preferable forms; a small glass of Bass' English ale or Dublin porter promotes appetite and general invigoration. Alcohol is not to be used in neuralgia for its narcotic effect as a remedy for pain. NITRO-GLYCERIN. Nitro-glycerin has been recommended in some forms of neuralgia accompanied with pallor, a weak pulse, small, rigid radial artery, etc. Single drop doses of a one per cent, solu- tion (glonoin) are given in cases of small pulse, but with a full pulse, the full effects cannot be produced with less than two-drop doses (Trussewitsch). When, on the other hand, headache and neuralgia occur in patients with chronic conges- tion of the subcutaneous veins of the face nitro-glycerin is to be avoided.* The condition in which it does the most good is one of failing circulation with atheromatous arteries and anae- mia. Nitro-glycerin seems to be an exciter of the vaso-dilator system of circulatory nerves, *. e. , granting that there are vaso- dilator nerves. * Lancet, Feb. 19th, 1887, p. 384. — i3 2 — V. Local Treatment, etc. Electricity. On account of the similarity of action between the electric current and the nerve current, it early oc- cured to electro-therapeutists so employ electricity in neuralgic complaints, with the intent of modifying the molecular state of the nerves and restoring the physiological function. Faradism was at first almost the only mode put in use, and Duchenne de Boulogne was one of the first to make thorough trials of the interrupted current in the treatment of neuralgia. According to his reports, remarkable success attended these trials. Since that epoch, Faradization has given uncertain results and often complete disappointment in neuralgic affections, and is now seldom resorted to in the treatment of any form of neuralgia. Faradization is believed to act as a particular mode of revulsion (Vanlair). Feeble Faradic currents are utterly ineffi- cacious in neuralgia. In order, says Vanlair, that they may manifest their curative active, they must provoke painful im- pressions. This has been the experience of other authorities. Mode of Application. — A Kidder, Mcintosh, Fleming or Hall battery may be used, and a pretty strong current em- ployed with frequent interruptions; the painful region to be electrized by the metallic brush. This is the method of "elec- tric fustigation " employed by Duchenne and Tripier. Becquerel recommended very strong and rapid currents. He advised the extra current and a wet sponge for electrode, and directed to apply the positive pole over the part of the nerve nearest the nerve centre, and the negative pole over the divisions of the nerve; to be passed to and fro. Seances of five minutes' duration. Vanlair prefers the "dry excitator," which, correspond- ing to the negative pole, should be placed over the painful region, the other electrode, which may terminate in a moist sponge, is placed a little distance off The electrodes are not moved back and forth over the skin, *. •"-.-•-<,- -■ :■<« S^l VW isio §?z^rw S&jfc . :>;• m & r%S$^£si JOT "i "-■■ &ss tHB '.Y*? ! 1|&