200 



Muscles of the Lower Extremity. 



Superficial Layer: 

 M. gastrocnemius s. gemellus 

 surae arises by two heads 

 above the external and inter- 

 nal condyles of the femur; 

 it is inserted into the Tendo 

 Acldllis and by means of this 

 into the tuberosity of the Os 

 calcis. (Extends the foot.) 



J/. solcus arises from the 

 head and posterior border of 

 the fibula , the Linca poplitea 

 and inner border of the tibia 

 (Fibular and Tibial portion) ; 

 it is inserted by means of the 

 Tendo Acldllis into the tuber- 

 osity of the Os calcis. (Extends 

 the foot.) 



J/. plantar is arises from 

 the external condyle of the 

 femur and is inserted by a 

 long slender tendon at the 

 side of the Tendo Acliillis into the 

 posterior part of the Os calcis. 

 (It slightly extends the foot, 

 but is not always present.) 



268. The Muscles at the 

 Posterior Side of the Le^ 



