. Modern surgery, general and operative. inger (Figs. 545, 547, 552, and 553). The Symptoms of Division of Nerves 847 The lumbar plexus supphes the cutaneous surface of the lower portion ofthe abdomen, of the front and the sides of the thigh, and of the inner por-tion of the leg and foot (Fig. 554). It innervates the flexors and adductorsof the hip-joint, the extensors of the knee, and the cremaster muscle. Thebranches sent to the leg are the obturator and the anterior crural nerves. The sacral plexus supplies the extensors and rotators of the hip, the knee-fiexors, and all the muscles of the
. Modern surgery, general and operative. inger (Figs. 545, 547, 552, and 553). The Symptoms of Division of Nerves 847 The lumbar plexus supphes the cutaneous surface of the lower portion ofthe abdomen, of the front and the sides of the thigh, and of the inner por-tion of the leg and foot (Fig. 554). It innervates the flexors and adductorsof the hip-joint, the extensors of the knee, and the cremaster muscle. Thebranches sent to the leg are the obturator and the anterior crural nerves. The sacral plexus supplies the extensors and rotators of the hip, the knee-fiexors, and all the muscles of the foot; also the skin of the gluteal region, theback of the thigh, the outer portion and the posterior part of the lower leg,and most of the foot (Gov/ers) (Fig. 554). Its chief branches are those to theexternal rotators of the hip—the gluteal nerve, the small sciatic, and the greatsciatic. The Anterior Crural Nerve.—-When this nerve is divided the extensor mus-cles of the knees are paralyzed. The psoas muscle is not affected, even if.
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