THE PERIPHERAL NERyOUS SYSTEM. 



401 



iG. 163. — Dissection of 

 Leg, Later a I, View, to 

 snow DiSTUiiiUTioN OF the 

 Great Sciatic Nerve. 

 The biceps, caudofcmoralis, 

 t,'liitcus iiiaximus, gluteus nie- 

 dius, tensor vagina; feiuoris, 

 and part of the peroneus 

 longus have been re- 

 moved, a, N. ischia- 

 dicus or great sciatic 

 nerve; />, muscular 

 branch; c, N. suralis; 

 '?', N. peroneus com- 

 munis; <?, N. tibialis; 

 /■ N. peroneus pro- 

 fundus; g, N. pe- 

 roneus superficialis 

 and its terminal 

 brandies; //, branch- 

 es of N. culaneus 

 feinoris posterior; /, 

 N. gluteus inferior; y, 

 N. gluteus superior; X', 

 vena saphena parva; 

 ^', communicating 



branch to V. glutea in- 

 ferior. I, M. sartorius; 2, 

 cut origin of M. gluteus me- 

 duis; 3, cut origin of M. glu- 

 teus niaxinuis; 4, cut origin of 

 M. caudofemoralis; 5, M. gluteus 

 nunimus; 6, M. gemellus superior; 

 7, M. pyriformis; 8, M. flexor cauds 

 iongus; 9, M. obturator internus; 10, 

 M. quadratus femoris; li, tuberosity of the 

 ischium; 12, great trochanter of femur; 13, 

 ^L rectus femoris; 14, M. vastus lateralis'; 

 15, M. adductor femoris; 16, M. semimem- 

 branosus; 17, M. scmitendinosus (the slender 

 ribbon-like muscle crossing this is M. 

 tenuissimus); 18, M. vastus intermedins; 19^ 

 M. plantaris; 20, M. gastrocnemius; 21, M.' 

 peroneus longus (cut); 22, M. tibialis an- 

 terior; 23, M. extensor longus digitorum; 

 24, transverse ligament; 25. M. peroneus 

 brevis; 26, M. soleus; 27, tendon of Achil- 

 les; 28, M. extensor brevis digitorum; 29. 

 tendon of M. peroneus tertius. 



