194 



THE NERVOUS SYSTEM. 



II, The Nerviis tibialis (Fig-s. 128 II, 129 T) passes backwards 

 and inwards to supply the extensors of the foot and the flexors of 

 the toes. Its branches are : — 



[a) The R. cutaneiis cruris posterior (Fig-s. 128 and 129 ct), ac- 

 companied by an artery and vein, passes to the skin of the calf. 



{h) A twig- to the upper part of the g-astrocnemius (Fig. 1 29 g'). 



The main nerve, after supj^lying 



Fig. 1 29. 



this twig-, bifurcates to form the 

 next two nerves. 



((?) The Nervns svralis (Figs. 

 128, 8j 129 s) runs downwards 

 on the inner border of the M. 

 cjastrocnemius and gives off : — 



(i) A twig {()") to the upper 

 third of the muscle. 



(2) The Hamus cutaneiis mé- 

 dius {es) is given off below the 

 middle of the M. gastrocnemius ; 

 it passes to the skin of the 

 lower third of the leg. After 

 giving off the latter branch, the 

 N. siiralis runs downwards along- 

 the inner aspect of the Tendo 

 achillis to the Aponeurosis j)lan- 

 taris of the sole of the foot 

 as far as the calcar, and gives 

 off:— 



Nerves of the leg and sole of the foot. 



Branch to the M. abduct, digit. V. 



Branch to the M. adduct. digit. V. 



M. rectus anterior. 



M. biceps. 



Ramus cutaneus médius. 



Ramus cutaneus cruris posterior. 



Ramus digitalis volaris I. 



Branch supplying R. digit, volaris X 

 and II. 

 dvIII Second branch of the N. tibialis. 

 i-'s Branch to the M. flex. brev. digit. V. 

 ftp Branches to the M. plantaris and the 

 M. flexor digitorum. 



Branch to the M. gastrocnemius. 



Branch to the M. gastrocnemius. 



N. peroneus. 

 s N. surahs, 



■vm M. semimembranosus. 

 T, t Nervns tibialis. 



«65 

 ads 



dvl 

 dvll 



9 



9" 



pc 



