O N PARALYTIC AND CONVULSIVE DISEASES OP THE CEREBROSPINAL SYSTEM, INCLUDING EPILEPSY, |ts IPlgsioIojs, anti Sriafmtnt. By H. P. DEWEES, M.D., NEW YORK. [From the Americas Medical Monthly for April and May, 1861.] O N PARALYTIC AND CONVULSIVE DISEASES OF THK CEREBROSPINAL SYSTEM, INCLUDING EPILEPSY, Its Hlpotogg, fhttjjotog!} anir treatment. By H. P. DEWEES, M.D N E W Y O R K. V [Read before the Medico-Chirurgical College, March, 1861.] Gentlemen—On retiring from the chair, at the meeting held at Dr. A. B. Mott’s, I offered for the subject of discussion, “ Epilepsy, its Physiology, Pathology, and Treatment.” As the habit in this College is to read a preliminary paper, I shall occupy your time only with such views as have been more recently propounded by others, and with the conclusions and results derived from my own observations, rather than by the repetition of more ancient surmises, which were founded on no scientific investigations, and which therefore offered no rational de- duction for treatment. But after considering in what manner I should treat the subject so proposed, numerous difficulties arose as to whether it should be merely taken up by a rigid adherence to the matter itself, or whether a more general and broader outline, embracing other connections and disorders, 2 PARALYTIC AND CONVULSIVE DISEASES but which are not unfrequeutly precursory concomitants, or subse- quent complications, would not be profitably adopted. I have conclud- ed upon the latter, and beg that you will excuse a more discoursive entrance into the subject, than a mere logical adherence to the matter would permit; since epilepsy is a disorder starting from many points of induction, although the chief seat of its objective phenomena is en- compassed in a strict regional boundary—the medulla oblongata. Yet, to understand in what manner this cranio-spinal portion of the cord becomes the great focal point of radiation in the manifestations of this terrible disorder, a knowledge of its central actions, and of its reflective enlistment, whether from the conducting nerve-fibres of the brain and spinal cord, or from the various viscera and periphera, is highly essential. Therefore, in a disorder implicating so many conditions of the sen- sific, motor, and psychical apparatus of the body, a clear conception of their reciprocal relations, as well as of their independent action, is necessary, in order to comprehend their disturbances, either as direct sequences, or as indirect manifestations in the course of the epileptic disorder. By this comprehension the nature of the disease will be more clearly unfolded, the premonitory symptoms will become more instructive, and a nearer approach to a scientific therapeutical con- duction can be made. In searching for the seat or cause of any disorder of the motor nervous system, the objective phenomena should be correctly classified. A single muscle, or groups of muscles, may be affected, either by cen- tral disturbance in the ganglionic cells themselves, or by their incite- ment to action through eccentric or reflex conduction. This reflex in- citement may reside peripherally, extra-cranial, or spinal; or, it may arise within the cranium, or in the cord itself. For instance, the point of irritation may be seated in any part of the superficies, or it may reside in the posterior spinal columns, aud thence be reflected to the associated ganglionic motor origins in the anterior or true motor columns. When intra cranial, the point of irritation may lie either in the cerebrum proper, whereby its conducting fibres are implicated, or in those portions in which the psychical manifestations originate. Every irritated sensory fibre can induce or increase reflex sensibility of the cord, by centripetal action. In these conditions, two things are to be remembered. The motor centres may be in a normal state themselves, the inciting condition be- ing anormal; or the conducting fibres may be in a true physiological 6tate, whilst the motor ganglionic cells may be overexcitable, or hy- OP THE CEREBRO-SPINAL SYSTEM. 3 pertrophic either as to number, by which the amount of muscular ac- tion is exaggerated; or as to inherent irritability or excitability, by which the force is proportionately overgenerated. This hypertrophic excess bears an inverted proportion to the oppo- site condition—viz., the atrophic. In the former, an undue supply of arterial blood may serve for the increase; or, the supply being normal, some special constituent of the blood may be in excess, or de- fective in quality, by which nutritive energy or functional manifesta- tion is exalted. But, both these latter conditions are not (infrequently established, independently of any peculiar blood composition, through an irritable or overexcitable state of the conducting fibres. In nervous atrophia, the opposite exists. The arterial blood may be insufficiently or defectively supplied, whereby the organic products are stinted, or rendered inert, although the cerebral impulse may be healthy. These states are instanced by those in whom the order or will is greater than the power or execution. Another form of atrophia is found in the executive portions of the nervous centres, from the im- peded or impaired condition of the conducting fibres, or of the psychical portions of the brain. Here the motor centres fall into the peculiar changes incident to parts whose functions have been long ab- rogated, and which may be termed the abuse of disuse. It is in these latter, particularly, that a paralytic state may exist in thg structures deriving their nerves from these atrophied centres, whilst a convulsive, spasmodic, or tetanoid condition of the associated or consensual parts exists, especially when the muscles thus partially paralyzed are endeavored to be acted on by the will, the impulse being distributed through those ganglionin cells giving origin to the nerves going to the associated muscles. Reflex causative action, both per- ipheric and cerebral, may happen in several ways. The impression may be conveyed through the peripheral sensory filaments of the paralyzed muscle or limb to the motor centres, or it may excite involuntary contraction in the sound limb, but which can be more or less restrain- ed by the voluntary action of the brain; or the organic system may be excited, producing static changes in the various viscera, with spas- tic retention or expulsion of their contents, &c. Although these various manifestations of the nervous system relate more to the multiform states of paralyses, yet the comprehension of the anatomical dependencies and physiological relations is all-important in the study of many nervous disorders, and especially of epilepsy. But I shall endeavor, in the physical details, to mingle as much physi- ological and pathological result from disordered regional action as 4 PARALYTIC AND CONYULSIYE DISEASES will relieve the tedious tension of the mind, which is so apt to accrue from mere anatomical description. The medulla oblongata is the additional intermediate organ between the spinal cord and the brain. And, in advance of entering on the subject, I will here state that this intermediate portion is without doubt the seat of the chief objective phenomena of epilepsy. From this point of radiation the muscular disturbances ensue; and whether the pundum saliens morbi, or point of irritation, be in the brain, spinal marrow, mucous or cuticular surfaces, yet the phenomena constituting the fit of true epilepsy must arise in great measure from the engage- ment of the medulla oblongata, or from its being centrally affected. In the medulla oblongata, as in the spinal cord, a median furrow ex- ists, interrupted by a decussation of fibres below the pons varolii. Internally, on each side of this furrow, arise the pyramidal bodies, which extend into the pons varolii. Externally, are seated the cor- pora olivaria, which do not extend into the pons, but are separated from it by a deep sulcus. Each olivary body is connected to its fel- low by intercommunicating fibres, which arise from the ganglionic cells, to pass through the raphe of the medulla oblongata; whilst the nuclei for the hypoglossal nerves, on which the motions of the tongue chiefly depend, are in close apposition to these bodies on their re- spective sides. These latter nerves take their origin from a large number of multi-polar ganglionic cells. The corpora olivaria are.thns anatomically connected, and become physiologically auxiliary to the hypoglossal nerves, whereby certain lingual motor'combinations are effected. It may be well to remark here, that the olivary bodies do not exist in fishes, or in the amphibia, whilst in the lower mammalia they are more or less rudimental. In other words, these bodies are developed according to the two great functions of the tongue—viz., combined movement and articulate speech. The hypoglossal nuclei lie close to each other, near the raphe, their simultaneous action being secured through fibres of inter- communication. By a like arrangement, the corpora olivaria are acted on bilaterally. The hypoglossal intercommunicating fibres are limit- ed, so that unilateral motions of the tongue can be voluntarily excit- ed. But, for the combination necessary for articulate speech, the bi- lateral harmony must be insured. Hence, in hemiplegia, paralysis of the movement of the tongue, differs from that of the combined consent for articulation and the sustained action of speech. The or- ders of the will must be communicated simultaneously to both olivary bodies, to secure their harmonious engagement, and that of both hypo- OP THE CEREBRO-SPINAL SYSTEM. 5 glossal nerves. In deglutition the same conducting influences must be preserved. Sustaining the results of direct experiment are the records of pathological investigation, showing that the corpora olivaria are fre- quently found in various morbid conditions in paralysis attended with loss of speech. And more confirmatory are the researches establish- ing, in cases of congenital atrophy, or of arrested development and growth in these bodies, the coincidence of aphonia, difficulties of deg- lutition, and more or less loss of command of the tongue. Cases have also been reported, and have been examined by myself, in which loss of speech resulted from inflammation of the pons varolii, as well as of the corpora olivaria. In the former, neuralgia is generally a promi- nent symptom. But these ablations of special functions are not to be always attrib- uted to lesions of these bodies, or of the associated hypoglossal nerves, since the defects of muscular consensual performances may be confounded with absence in the mental conception of language and mem- ory of words; or with those lesions implicating the traditional action of the will, as when the striated bodies are impaired, and which are attended with paralysis of motion of other portions. Injuries to the anterior frontal cerebral lobes, especially, arc apt to be followed by what is commonly termed imperfection or loss of speech. But in these cases the conception of language, or rather of ideas for language, is more impaired than the power to execute is destroyed. Nor must those cases where both the conception and the olivary function are not disturbed be confounded with those in which the conducting fibres are exclusively at fault. In several cases falling under my own observa- tion, I have found that the patient could not voluntarily communicate his thoughts by speech, although the reflex movements of the tongue were perfect; yet he could do so by writing, indicating an interruption through the conducting fibres, but showing that the conception of language was intact. Again, I have witnessed the imitative or repe- titional actions perfect, without corresponding conception; thereby evincing the integrity of the conducting fibres and of the corpora olivaria, but showing that injury to the originating sensorial portions of the brain had taken place, as was afterwards verified by post-mortem examination. Traumatic injuries of the frontal bone, whereby the anterior por- tion of the cerebrum has been compressed or otherwise temporarily injured, have not unfrequently resulted in loss of speech, which has 6 PARALYTIC AND CONVULSIVE DISEASES been in some cases restored by surgical aid, or by the recession of the local disturbance. These cases indicate the ablation of the couceptional power within the brain, and not of the capacity of performance through the olivary bodies and hypoglossal nerves. For although articulate speech is lost, yet the voice can be excited through reflex actions of the various surfaces, and especially by those attended with severe pain. But these centres, during long-continued arrest of the cerebral actions, are liable to fall into pathological changes, or jnto a physiological proportion of functional relation. Hence softening, fatty, or atrophic degeneration, induration, &c., occur, whereby not only the voluntary, but the reflective actions are lost, or rendered feeble. Even if the injury of the anterior lobes be recovered from, yet the olivary bodies are apt to undergo certain transmutations, which may abrogate their function, in accord- ance with the law which governs the propagation of consensual mor- bid states in organs correlated in function, or from the more general law which regulates the reproductive energies in parts functionally reciprocal. The congenital cases of the deaf and dumb cannot all be placed to arrest or imperfection of development in foetal life. The injuries sus- tained during labor by the anterior lobes from mechanical pressure of the pelvic bones, or by the instrumental or digital manipulations, must be taken into consideration. Nor need we expect to find a direct traumatic lesion, or its indication, when examining the brain in such accidental cases; since the pressure so exerted may merely induce a change in the molecular constitution of the impinged-on lobes, by which their nutrition is disturbed. And the same may happen to the posterior occipital region, whereby the medulla oblongata and its auxiliary ganglia, the pyramidal and olivary bodies, may be damaged, since the position of the parts are constantly varying, according to the flexed or extended position of the head. In some of these cases, a mere physiological atrophy is apparently established; as, in course of time, both hearing and speech become more and more established; differing in this progressive recuperation from pathological degener- ation, in which there can be no improvement. Aphonia, alternating with sudden return of speech, is not uncommon in hysterical cases; but when accompanied by persistent hemiplegia, either in the male or female, some cerebral lesion must be concluded on. In one gentle- man, whose voluntary command of deglutition and of speech was constantly varied from trivial indistinctness and inability to complete loss, I found, after death, a tumor in the pons, which pressed more or OP THE CEREBRO-SPINAL SYSTEM. 7 less, according to the vascular condition, on the medulla oblongata, whereby the functions of the auxiliary ganglia, the olivary and py- ramidal bodies, were interrupted. In this case, the legs and bladder were at times greatly paralyzed, probably from the interference with conducting fibres in the pons, and from the pressure exerted on the pyra- mids, whose function apparently presides over the movement of the extremities. There was also intense neuralgia. Yisible alterations or encroachments on the cerebro-spinal struc- tures do not always appear on autopsical examination, to account for losses of function of their various parts. The changes are those of molecular nutrition, at times scarcely recognizable by the microscope. Yet in many such cases neither proper conception nor power of speech has been destroyed, but the memory of words and of their combina- tion is lost. When spoken to, they are slow of comprehension, or are totally deprived of intellectual translation. Yet they will imitate the sound, or sometimes repeat like an echo a portion of the spoken sentence. It is, so to speak, a paralysis of memory, and not of the organs for speech. In others, I have witnessed a complete loss of memory of the customary language, with perfect return of another for years unemployed and forgotten. But these effects are not, gener- ally, from special cerebral disorder, although I have seen them in the hemiplegic. They happen mostly as consecutive complications in diseases of other organs. But, when happening, they are generally prognostic of fatal issue. The temporary exchange of one language for another, arising from traumatic injury, or from fever, with cere- bral engagement, must not be confounded with those just cited. In the case of a young medical gentleman from Georgia, who had suf- fered from the effect of deep cellular pelvic abscess, accompanied by de- lirium, and had been ignorantly bled into deliquium, followed by vio- lent mania, I found that he had lost the memory not only of his lan- guage, but also of his parents, friends, and letters. His education had to be begun again, from the very alphabet, and for months he made but slow daily progress. One morning, on rising, like a flash of light, all returned to him, and the comparative imbecile of the night before became the son of science once more. Injuries to the olivary body are apt to be followed by more or less paralysis of the facial nerve, through which the expression and motion of the corresponding side of the face are interfered with, as the supe- rior portions of the olivary bodies are connected with the seventh pair of nerves; whilst the inferior are connected with the hypoglos- sals, which may be included in the lesion, producing great difficulty of 8 PARALYTIC AND CONVULSIVE DISEASES speech,