THE LEG 



1457 



(figs. 1158, 1172), having passed from the arch on the dorsum over the medial 

 malleolus, runs up close to the medial border of the tibia, where it is to be avoided 

 in ligature of the posterior tibial, to the back of the medial condyle; here this ves- 

 sel is to be remembered in operations on the knee-joint; then upward along the 

 thigh, over the roof of the adductor (Hunter's) canal, to the fossa ovalis (saphe- 



FiG. 1173. — Relations of the Popliteal Artery to Bones and Muscles. 



,1 



Superior lateral articular artery • 



Tibial nerve ■ 



Fibular lateral ligament • 



Inferior lateral articular artery . 



Popliteus ■ 



Muscular branch to soleus ' 

 Soleus ■ 

 Anterior tibial artery 



Peroneus longus 

 Peroneal artery 



Branch of tibial nerve to flexor 

 hallucis longus 



Flexor hallucis longus ■ 



Cutaneous branch of peroneal artery 



Superior medial articular artery 

 ■ Popliteal artery 



• Posterior ligament of knee 



' Azygos articular artery 

 Semi-membranosus 



• Inferior medial articular artery 

 Muscular branch 



. Tibialis posterior 



Tibial nerve 



Muscular branch of tibial nerve to 

 flexor digitorum longus 



Flexor digitorum longus 



Posterior tibial artery 



Peroneus brevis 

 Continuation of peroneal artery 



Calcaneus 



Tibialis posterior 



Communicating branch 

 Laciniate ligament 



Internal calcaneal artery 



nous opening) (p. 1440 and fig. 1172), where it joins the femoral by perforating 

 the cribriform fascia and the femoral sheath. Four to six valves are present, 

 chiefly in the upper part. 



The 'dangerous area,' or that in which thrombosis is most likely to occur, reaches from the 

 centre of the thigh to the middle of the leg. (Bennett.) The saphenous nerve joins the vein 

 below the knee, having been under the sartorius above this point (fig. 1159 and 1160). The 

 92 



