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

almost vertically, to be distributed to the skin and superficial fascia of the gluteal region. Next, we find a neuralgic spot at the highest and middle point on the crest of the ilium, where the great musculo-cutaneous nerve gives off a large superficial branch. Next, there is a neuralgic point at the anterior superior spinous process of the ilium, above the groin, where the musculo-cutaneous nerve gives off its abdominal branch, which is distributed to the mons pubis, the folds of the groin; and near here, too, the scrotal branch anastomoses, which is very liable to be a neuralgic spot. Another very liable point is at the external abdominal ring, (which may extend along the course of the spermatic cord,) where the scrotal nerve branch emerges from under the crcmastcr muscle to accompany the spermatic cord in the male, and the round ligament in the female, then to be finally distributed in the integument of the scrotum of the former, or in the external labium in the latter. The i/io-scrotal nerve also is often neuralgic, and excessively painful along the course of it from the abdominal ring to the groin. But perhaps the most frequently neuralgic spot we find in this region is that over the internal abdominal ring, where the genito-crnra nerve comes out a very little beloiv Povparfs ligament; from there this nerve descends to be ultimately dis- tributed to the skin and fascia on the top and front aspect of the thigh as far as half way down to the knee. (Sec B, E.) Rule. — In treating these painful points and regions, begin the seance with the positive electrode placed at or above the highest painful point, while the negative is below or beyond the lowest site of pain ; then move the positive, from minute to minute, towards the negative, until it is below the lowest site of pain. Nerves of the Sciatico-Femoral Neuralgic Region. This simply embraces the lower limb. We have here then but two great nerve trunks to consider, viz., the femoral nerve, (crural,) on the inner and anterior aspect of the limb, and the great ischiatic (sciatic) nerve, on the posterior and outer aspect of the limb. The roots of these two great nerves are inter- pelvic, arising from the lumbar and sacral plexuses; and as the