Electro-physiology and electro-therapeutics : showing the best methods for the medical uses of electricity / By Alfred C. Garratt.
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neous branches. The superior branch of it passes through the malar bone, and comes out again to be distributed upon the anterior temple and the cheek. The inferior branch of it sup- plies the conjunctiva, and terminates in the integuments of the upper eyelid, also communicating with the facial nerve. But it is the superior branch, just described as mounting up to the temple, and there being lost in the integuments, that is the scat of the most frequent attacks of neuralgia. The frontal branch is the smallest of the ophthalmic third of the tri-facial nerve, and gives off but one branch, the supratrochlear, which passes in- ward and over the pulley of the internal oblique eye muscle, and ascends then along the middle line of the forehead, very super- ficially, giving filaments to the skin, to the inner angle of the eye, root of the nose, and also to the conjunctiva. The exact ramification of the two branches of the frontal nerve can be distinctly traced as being separate as far as the vertex, where they terminate ; and along the occipital suture many of the twigs interlace with the filaments of the sub-occipital nerve. The nasal branch of the ophthalmic plunges into the deep part of the orbit, and after crossing the optic nerve, enters the eth- moidal foramen, and seeks the nose through the slit-like crista galli, then dividing into two, the internal supplying the mucous membrane of the nose, about the opening of the nares, while the external branch is mostly distributed to the skin of the nose, even to its tip, and also giving a filament to the upper eyelid. Such is the superficial plot of the ophthalmic, or first branch of the great tri-facial. The second and larger branch of the tri-facial we know is called the superior maxillary nerve. It comes out forward, through the foramen rotundum, enters the canal in the floor of the orbit, and runs out at the infra-orbital foramen. Emerging then on the face, just beneath the levator labii svperioris mus- cle, it here immediately divides into multitudinous branches, thus diffusing itself mostly at and about its issue, but sending some filaments to the lower eyelid, to the conjunctiva, to the muscles and integuments of the upper lip, nose, and cheek, and finally forming anastomosis with the portio dura. True, there