THE SPINAL NERVES. 



193 



Fig. 128. 



(i) A branch to the upper third of the M. semlmemhranosuft. 



(2) A branch to the Rectm interum minor. A twig of this 

 branch {hb) pierces the muscle transversely in company with the 

 Arteria cutanea, and passes to the skin of the middle of the inner 

 surface of the thig-h. 



(3) Branches to both heads of the sevi'dendinosus. 



(4) Branches to the j\l . adductor magnus. 



{d) Branches covered by 

 the 31. pijramidalis to the 

 M. quadrat, femoris and M. 

 ohturator. 



[e) A branch (5) forwards 

 to the M. tj'icqjs. 



(/) A branch (6) which 

 accompanies the Art. clrcnm- 

 jiexa genu lateralis mip. for- 

 wards to the M. extensor es 

 cr7iris, the M. vastus externvs, 

 and the 31. rectus anterior. 



Distribution of the sciatic nerve. 



1 The sciatic nerve. 

 II N. tibialis. 



/// N. peroneus. 



r Branches to tlie M. pyramidalis. 



2 N. cut. fern, posterior. 



3 Large collateral branch. 



5 Branch to the M. biceps. 



6 Branch accompanying the art. cir- 



cumfl. genu lateralis sup. 



7 Branch of tibial nerve to the M. gas- 



trocnemius. 



8 N. suralis. 



ad"' M. adductor magnus. 



* M. biceps. 



66 Twig accompanying the art. cutanea. 



ci M. coccygeo-iliacus. 



cp N. cut. cruris lateralis. 



ct R. cut. cruris posterior. 



.</ M. gastrocnemius. 



pi M. glutaeus. 



p M. pyramidalis. 



pe M. peroneus. 



ra M. rectus anterior. 



ri' M. rectus tntemus minor. 



sm M. semimembranosus. 



st M. semitendinosus. 



ve M. vastus externus. 



