THE LEG 



277 





upon the medial aspect of the distal part of the tibia. It has 



also been dissected upon 



the medial aspect of the 



thigh and knee. It can 



now be exposed in its 



course along the medial 



side of the calf of the leg. 



It lies a short distance 



posterior to the medial 



border of the tibia. The 



small saphenous vein has 



been seen to arise from 



the lateral end of the dorsal 



arch and to pass proximally 



posterior to the lateral 



n i Ti. ivieuiai cutaneous gag" , ,'rt "TiT 



malleolus. It may now 

 be followed, as it ascends 

 along the lateral side of 

 the tendo calcaneus, to the 

 posterior aspect of the leg, 

 where it lies over the inter- 

 val bet ween the two heads of 

 the gastrocnemius muscle. 



Lumbar nerves 



Lateral cutaneous 



branches of last 



dorsal and ilip-" 



hypogastric 



Sacral nerves 



Perforating 

 cutaneous " 



Branches from 



posterior femoral 



cutaneous nerve 



Lateral cutaneous 



Perineal rami of 



posterior cutaneous 



nerve 



Posterior cutaneous 

 nerve of the thigh 



Medial cutaneous 



Lateral cutaneous 



Medial cutaneous 





Prwal anastomotic 



When it gains the distal Posterior cutaneous nerve 



of the thigh TTf T 



I 



I 





part of the fossa poplitea it 

 pierces the deep fascia and 

 joins the popliteal vein. 



Associated with each 

 of these veins are certain 

 cutaneous nerves, which 

 must be displayed at the 

 same time. The posterior 

 cutaneous nerve of the thigh 

 is closely related to the 

 small saphenous vein in 

 its proximal part, and the 

 sural nerve accompanies it 

 in the distal half of the 

 leg. In company with 

 the great saphenous vein is 

 the saphenous nerve. 



Cutaneous Nerves. These are very numerous. 



Medial cutaneous nerve of 



the calf (O.T. ramus com- 



municans tibialis) 



Sural nerve (O.T. short 

 saphenous) 



Medial calcanean 



FIG. 10 1. Cutaneous Nerves on 

 the posterior aspect of the Lower Limb. 



On the 



