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

other filament can be traced to the skin and fascia of the mamma. The cutaneous branches of thefoti/rth and fifth intercostal nerves send anterior twigs to the integument of the mammary gland, and posterior twigs to the scapular i-egion of the back. Then the cutaneous branches of the remaining, or lower seven inter- costal nerves, arrive at the surface from between the ser- rations of the serratus magnns muscle above and the external oblique below, and these spread both backward and forward to all the surface of this anterior and lateral portion of the body. But the cutaneous branch of the last dorsal nerve, is remarkable for its size, and its ready response to the electrode. It pierces the internal and external oblique muscles, and at once becomes superficial; then crossing the superior crest of the ilium, it is thrown into the integument over the dorsum of the ilium and of the gluteal region even as low down as the trochanter major. To sum up, then, we find the rule, as first laid down by Dr. Valleix, that there are in each dorsal nerve three principal points, — i. e., that one is a point of " emergence," one of " superficial," and one of " distribution." The first is along the side of the spine over the intervertebral foramen, the second on the middle arch of the ribs, and the third along the side of the sternum and linca alba. The first series of neuralgic points in the dorsal region, are found along the side of the spine, over the spot where these nerves emerge, which is about one inch from the side of the spinous process. The second neuralgic spot, here, is found along the back muscles, where are distributed to the skin all those short terminal twigs of the posterior branches of the dorsal nerves. The third great neuralgic spot, or spots, are found over the middle of each intercostal space ; that is, at about the most prominent bend of the ribs, where the cutaneous branch bifurcates to become superficial. The fourth neuralgic spot is found but a little to either side of the sternum, or linea alba, where the terminal twigs of all the intercostal nerves become sub-cuta- neous, and are reflected backward and forward over the in- tegument, through all that region: particularly is this so just under or below the mamma ; and that is far more frequetitly