222 



Anatomy of the Rabbit. 



Lateral 



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. 

 A"'""' 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 



,j„ 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. 



(b) 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 



Posterior 



Fia. 76. Transverse section through the middle 

 of the thigh: a.l.. adductor longus; a.m.. ad- 

 ductor magnus; b.f.i and b.f.2, first and second 

 heads of the biceps femoris; f., femur; gr., gracilis; 

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

 n.t., tibial nerve; r.f. i and r.f. 2, first and second 

 headsof therectusfemoris; s, sartorius; sm., semimem- 

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

 cruris; tJ.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. 



