. The anatomy of the domestic animals . Veterinary anatomy. 324 FASCIA AND MUSCLES OF THE HORSE Relations.—Laterally, the skin and fascia, the biceps, and the medial head of the gastrocnemius; medially, the coccygeal fascia, the sacro-sciatic ligament, the semimembranosus; anteriorly, the biceps femoris, branches of the femoral artery, and the great sciatic nerve. Blood-supply.—FosterioT gluteal, obturator, and posterior femoral arteries. Nerve-supply.—Posterior gluteal and great sciatic nerves. Origin of ohliquus ab- dominis intern us Inguinal ligament {part removed) Iliacus Tensor facia laic
. The anatomy of the domestic animals . Veterinary anatomy. 324 FASCIA AND MUSCLES OF THE HORSE Relations.—Laterally, the skin and fascia, the biceps, and the medial head of the gastrocnemius; medially, the coccygeal fascia, the sacro-sciatic ligament, the semimembranosus; anteriorly, the biceps femoris, branches of the femoral artery, and the great sciatic nerve. Blood-supply.—FosterioT gluteal, obturator, and posterior femoral arteries. Nerve-supply.—Posterior gluteal and great sciatic nerves. Origin of ohliquus ab- dominis intern us Inguinal ligament {part removed) Iliacus Tensor facia laics Rectus femoris. Vastus medialls Sartorius Gracili Patella Medial patellar li(i<iinetif ^^ Tendon of smiorius Tendon of gracilis Fascia cruris Fig. 2S7.—Muscles of Pklvis and Thigh of Young Horse, Right Side; Medial View. 1, Psoas minor, and 1', its insertion; 2, psoas major; 3, 3', heads of obturator internus; 4, sacro-coccygeus ven- tralis; 5, coccygeus; 6, retractor ani (cut); 7, sacro-sciatic ligament; 8, lesser sciatic foramen; 9, semimembranosus; 10, lumbo-sacral plexus; 11, obturator nerve and vessels (cut); 12, femoral vessels (origin); 13, pubis; 14, prepubic tendon; , deep inguinal lymph glands; 16, opening for external pudic vein. Vertebree are numbered by regions. 7. Semimembranosus^ (Figs. 276, 287, 288, 576).—This very large, three- sided muscle lies on the medial surface of the preceding muscle and the gastroc- nemius, and has two heads of origin. Origin.—(1) The posterior border of the sacro-sciatic ligament; (2) the ventral surface of the tuber ischii. ' This muscle was incorrectly designated the adductor magnus by Percivall and Strange- ways. Its name, however, is not at all descriptive of its structure in the domesticated Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the origina
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