THE LEG 



365 



sartorius and gracilis, it gives off an infrapatellar branch, 

 which pierces the sartorius 



Lumbar nerves 



Lateral cutaneous 



branches of last 



thoracic and ilio- 



hypogastric 



Sacral nerves 



Perforating 

 cutaneous 



Branches from 



posterior cutaneous 



nerve of thigh 



Lateral cutaneous 



Perineal rami of 



posterior cutaneous 



nerve of the thigh 



Posterior cutaneous 



nerve of the thigh 



Medial cutaneous 



nerve of the thigh 



Lateral cutaneous 

 nerve of the thigh 



Medial cutaneous_ 

 nerve of the thigh 



Peronaeal anastomotic 

 nerve 



Posterior cutaneous 

 nerve of the thigh 



Medial cutaneous nerve 



of the calf (O.T. ramus 



communicans tibialis) 



Nervus suralis 

 (O.T. short saphenous) 



on its way to the patellar 

 plexus. Beyond the knee 

 its branches are distributed 

 to the skin of the medial 

 side of the leg, including 

 the medial crural region, 

 the medial part of the 

 posterior crural region, 

 and the medinl part of 

 the dorsum of the foot. 



N. Cutaneus Surae 

 Medialis. The medial 

 cutaneous nerve of the 

 calf springs from the tibial 

 nerve in the popliteal 

 fossa, descends between 

 the two heads of the gas- 

 trocnemius, pierces the 

 deep fascia of the leg, 

 about midway between the 

 knee and the ankle, and 

 unites with the anastomotic 

 branch of the peroneal 

 nerve to form the sural 

 nerve at the lateral border 

 of the proximal part of the 

 tendo calcaneus. It sup- 

 plies the skin of the middle 

 part of the calf of the leg. 



N. Anastomoticus Per- 

 onseus. The anastomotic 

 branch of the common 

 peroneal nerve springs 

 from the common peroneal 

 nerve in the popliteal fossa, 

 crosses superficial to the 

 lateral head of the gastro- 

 cnemius, where, as a rule, 

 it pierces the deep fascia ; then it passes downwards and 

 medially to the proximal end of the lateral border of the 







Medial calc 



:anean nervi 



FIG. 161. Cutaneous Nerves on the 

 posterior aspect of the Inferior Extremity. 



