MUSCLES OF THE PELWC LIMBS. 



197 



Relations. Lateral surface with the semitendinosus (Fig. 

 90,7), the biceps femoris (Fig. 68, /), and distad with a small 

 part of the adductor femoris (Fig. 92, ^), and with the gas- 

 trocnemius (Fig. 92,7'). Medial 

 surface with the gracilis (Fig. 

 91, ) and distad with the 

 sartorius (Fig. 91, a). Cra- 

 nial (or dorsal) border at 

 the origin with the quad- 

 ratus femoris (Fig. 90, 

 /") ; for the remainder 

 of its length with the 

 adductor femoris (Fig. 

 90, //). Caudal bor- 

 der with the integu- 

 ment proximad. 



Action. Extensor 

 of the thigh. 



M. sartorius (Fig. 91, 

 a; Fig. 68, q\ A large flat 

 muscle along the medial side 

 of the thigh near its cranial 

 (dorsal) border. 



Origin from the ventral half of 

 the crest of the ilium and from the 

 medial half of its ventral border craniad 

 of the auricular impression. The caudal 

 third of the origin is by a thin tendon, 

 the rest by fleshy fibres. 



FIG. 91. MUSCLES ON THE MEDIAL SIDE OF 

 THE LEG. 



<7, M. sartorius; t>. M. gracilis; c, M. iliopsoas; d, M. 

 rectus femoris; e, M. vastus medialis; _/", M. pectineus; 

 g, M. adductor longus; /i, M. adductor femoris; i, M. 

 semimembranosus; /, M. semitendinosus; k, medial 

 head of M. gastrocnemius; /, M. plantaris; m, M. flexor 

 longus hallucis (;;/, its tendon); n, M. flexor longus 

 digitorum; (n'. its tendon); o, M. tibialis posterior; /, 

 M. tibialis anterior; </, M. interosseus of second digit. 

 I, patella; 2, calcaneus; 3, medial malleolus; 4, second 

 metatarsal; 5. transverse ligament of the lower leg. 



