Electro-physiology and electro-therapeutics : showing the best methods for the medical uses of electricity / By Alfred C. Garratt.

by appropriate telegraphing nerves. This muscular hyperesthe- sia, although less acute than that of the skin, is, however, sus- ceptible, like the latter, of increase, of diminution, and of abo- lition. Facial neuralgia, or " tic douloureux" is an affection 'whose pathological and symptomatic phenomena can be stated only in connection with the morbid exaltation of sensibility of which it is constituted. The suffering is generally referred to one of the three branches of the tri-facial nerve, (the fifth pair,) and darts along the ramifications, so that the precise spot or tract can be indicated by the patient. But it occurs more frequently in the two upper branches than in the inferior maxillary branch. When seated in the first or ophthalmic branch, the frontal ramifi- cations of it are oftener affected (brow-ague, or claws hystericus) than the lachrymal or nasal; but, in some cases, it involves all these — there may be a superabundant secretion of tears, or pain in the eye. When the second, or superior maxillary branch, is the part involved, then the infra-orbital is the scat of suffering, and that more generally where the nerve passes out from that foramen; or the pain may radiate from there, or it may be expressed mainly in the upper lip, or ala of the nose, or in the gum. If the posterior dental ramification of the second branch is the seat of the affec- tion, then the attack resembles the most awful toothache. If the tic is in the third branch of the tri-facial, it is manifested in the inferior dental nerve ; and more usually in the mental por- tion where it emerges from the mental foramen on the chin, and the pain extends to the inferior lip. It sometimes extends through the branch that communicates with the seventh pair, and thus implicates it. The pain may be seated rather in the anterior auricular branch, and then extends to the temple in the course of the temporal artery. The pain may extend to the lingual branch. During the paroxysm of facial neuralgia, the muscles of the face are often contracted on the affected side. The least motion, noise, or light aggravates the pain ; usually there is no febrile commotion in the system, and no acceleration of pulse, even during the most intense suffering. The duration of