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

observed on the left than on the right side. Another particular spot so abundantly supplied with surface filaments is over the region of the stomach, the pain there being more frequently ascribed to that viscus ; another is near the umbilicus, and the pain there is often ascribed to the underlying bowels. The fifth neuralgic spot, in this field, is that just over the upper and anterior part of the crest of the ilium, where the last great cuta- neous branch of a dorsal nerve emerges, so that its trunk is there superficial, lying on the external oblique muscle, to cross over to the dorsum of the ilium, and be broadly radiated in the in- tegument over the great glutei muscles. (See Appendix P, G.) Nerves of the Lumbo- Sacral and Abdominal Region. In this neuralgic field we have to look at the remaining lower eleven pairs of spinal nerves. Five of these are lumbar, while six pairs are sacral. From the lumbar nerves results the great lumbar plexus; from the latter, the sacral plexus; then from these result the great nerve trunks of the lower limbs. But here we will confine our anatomical review to the " pelvic re- gion," including the five lumbar vertebrae, the sacrum, and the sides of the pelvis, the lower part of the abdomen, and the genital organs. Each of the five lumbar nerves, as they leave the intervertebral foramen, communicates first with the lumbar ganglia of the sympathetic, and then the anterior branch of each of them passes obliquely outward and downward back of the psoas magnus mus- cle, but underneath or in front of the quadratus lumborum, to both of which it sends a nervous supply. The first posterior lumbar branches pass directly backward from between the transverse processes of the vertebras, and here each divides into two. The internal of these first supplies the multifidus spince, and the inter- spinales, then becomes cutaneous, and supplies the integument of the " hollow of the back," or lumbar region, on or near to the middle line. The external twigs of these posterior branches anastomose frequently, and so form loops, and after supplying 39