MUSCLE-NERVE. 



muscle from the tibia. Cut the tibia through, just below the knee, 

 being careful to avoid injury to the nerve where it enters the 

 muscle on its upper and dorsal aspect. Tie a thread about the 



t.a. 



A. B, 



FIG. 8. Muscles of Frog's Thigh and Leg. A, Dorso-lateral view, gl, Gluteus; 

 c.e, coccygeus ; py, pyriformis ; v.e, vastus externus; r.a, rectus anterior; t.f, triceps 

 femoris ; r.i, rectus internus ; s, semimembranosus ; b, biceps ; g, gastrocnemius ; 

 p, peroneus; t.a, tibialis anticus. B, Ventro-lateral view, sar, Sartorius ; ad.l, 

 adductor longus ; ad.b, adductor brevis ; ad.m, adductor magnus ; r.i.mi and r.i.ma, 

 rectus internus minor and major (or gracilis); g, gastrocnemius ; t.a, tibialis anticus; 

 t.p, tibialis posticus. 



tendo Achillis, just above the sesamoid cartilage. Cut the tendon 

 below the ligature. 



On the dorsal side of the thigh, carefully separate the gluteus 

 maximus muscle and biceps from the semimembranosus, using the 

 fingers for the purpose. This exposes the sciatic nerve. Carefully 

 separate it from the surrounding muscles, avoiding pulling and 

 stretching as much as possible. It is well to handle the nerve with 



