. The anatomy of the domestic animals. Veterinary anatomy. GREAT SCIATIC NERVE 825 which emerge above the great sciatic ncrv-e. The dorsal nerve passes backward on the upper part of the sacro-sciatic hgament and divides into branches which enter the biceps femoris; it suppHes a branch to the posterior part of the middle gluteus, and a nerve which turns around the posterior border of the latter and enters the posterior liead of the superficial gluteus. The ventral nerve runs do\\niward and liackward on the sacro-sciatic ligament and di%ides into the posterior cutaneous nerve of the thigh (N. cu
. The anatomy of the domestic animals. Veterinary anatomy. GREAT SCIATIC NERVE 825 which emerge above the great sciatic ncrv-e. The dorsal nerve passes backward on the upper part of the sacro-sciatic hgament and divides into branches which enter the biceps femoris; it suppHes a branch to the posterior part of the middle gluteus, and a nerve which turns around the posterior border of the latter and enters the posterior liead of the superficial gluteus. The ventral nerve runs do\\niward and liackward on the sacro-sciatic ligament and di%ides into the posterior cutaneous nerve of the thigh (N. cutaneus femoris caudalis) and muscular branches which supply the semitendinosus. The former passes through the biceps femoris, emerges between that muscle and the semitendinosus at or a little below the level of the tuber ischii, and ramifies subcutaneously on the lateral and posterior surfaces of the hip and thigh (Fig. 657). The deep part of the nerve is connected bj' filaments with the pudic nerve. Great Sciatic Nerve The great sciatic nerve (X. ischiadicus) (Figs. 574, 580, 658), the largest in the body, is deriveti chiefly from the sixth lumbar and first sacral roots of the lumbo- Sacral spines Lateral sacro- / Uiac ligament \ Sacro-aciiil liganunt. Branches of anterior gluteal artery and nerve Iliaco-femoral or lateral circumflex vessels Pubic tuberde Lesser sciatic foramen Geind- A nnstomosis^ lus between ob- luratur and internal pudic veins Obturator arter;/ Obturator internus ^Obturator vein Fig. 60S.—Vessels .vxd Xerves ox Pelvic Wall of Horse. Nervus ischiadicus = great sciatic nerve; n. glut. inf. = posterior gluteal ner\"e; n. pudendus = pudic nerve. (.Alter Schmaltz, Atlas d. Anat. d. Pferdes.) sacral plexus, but usually has a fifth lumbar root and may receive a fasciculus from the second sacral nerve. It emerges through the greater sciatic foramen as a broad flat band which is blended at first T\ith the posterior gluteal ner\'e and passes do^Tiward and back
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectveterinaryanatomy
