222 



Anatomy of the Rabbit. 



Latera 



nsm. 



Medial 



inserted on the medial and lateral surfaces of the knee-joint and. the 

 corresponding proximal portions of the leg. They form the bound- 

 aries of the popliteal fossa. 



(a) The sartorius. 

 Rn " r,or Origin : Posterior 



portion of the in- 

 guinal ligament, es- 

 pecially its sacral 

 extension. Inser- 

 tion : Medial con- 

 dyle of the tibia. 

 This is an extremely 

 thin and narrow 

 band of fibres, lying 

 on the more anterior 

 portion of the med- 

 ial surface of the 

 thigh. The muscle 

 is fused distally with 

 the gracilis. It has 

 the position of a 

 rotator muscle, and 

 is only a flexor 

 through its connec- 

 tion with the latter. 

 The gracilis. Ori- 

 gin : The entire ex- 

 tent of the pubic 

 symphysis. Inser- 

 tion : Through a 

 broad, tendinous ex- 

 pansion ending in 

 the fascia of the 

 proximal portion of 

 the medial surface of the thigh. The muscle forms a broad, com- 

 paratively thin sheet, covering the posterior portion of the medial 

 surface of the thigh. Its insertion tendon is perforated 



— 9 r 



(b) 



Posterior 



the middle 



a.m., ad- 



and second 



gr., gracilis; 



Fig. 76. Transverse section through 

 of the thigh: a.l., adductor longus 

 ductor magnus; b.f.i and b.1.2, first 

 heads of the biceps femoris; f.. femur; 

 n.p., peroneal nerve; n.s.m, greater saphenous nerve; 

 rut., tibial nerve; r.f. 1 and r.f. 2, first and second 

 headsof the rectus femoris; s, sartorius; sm., semimem- 

 branosus; St., semitendinosus; t.f.c, tensor fasciae 

 cruris; t.f.l., tensor fasciae latae; v.i.i and v.i. 2, first 

 and second heads of the vastus intermedins; v. is. 

 sciatic vein; v.l.,vastuo lateralis; v. m., vastusmedialis; 

 v.s.m., great saphenousvein. 



