DISSECTION OF THE DEEP MUSCLES. 



191 



the h-mlo Achillis about the middle of the leg. This little muscle 

 .s the popliteal vessels, and lies on the soleus. 



Action. It assists slightly the gastrocnemius in extending the use like 

 ankle if the foot is not fixed, and in bending the knee-joint if the f^ius 1 

 foot is immovable. 



Dissection (fig. 74). The soleus is now to be detached from Detach 



soleus, 



Semimembranosus. 



Soleus. 



Biceps. 



Peroneuslongus. 



Groove for tibialis posticus tendon. 



FIG. 73. THE TIBIA AND FIBULA FROM BEHIND. 



the bones of the leg, and the vessels and nerves entering it are to be 

 divided ; but in raising it, the student should take care not to injure 

 the thin deep fascia and the vessels and nerves beneath. The super- 

 ficial muscles may be next removed by cutting through their tendons 

 near the os calcis ; and the bursa between the tendo Achillis and 

 the os calcis should be opened. 



The piece of fascia between the muscles of the superficial and and clean 

 deep groups is then to be cleaned ; and the integuments between 



