70 



which passes under the ankle joint, being- much thickened as 

 it does so and ends in the strong- plantar fascia of the foot. 



The Tibialis Posticus arises from the whole leng-th of the 

 flexor surface of the tibia ; it ends in a tendon which passes 

 around the inner malleolus, lying in a groove in the lower end 

 of the tibia and is inserted into the dorsal surface of the 

 astragalus. 



The Tibialis Anticus lies on the extensor surface of the leg ; 

 it arises by a longf thin tendon from the lower end of the femur 

 and divides about the middle of the leg into two bellies which 

 are inserted into the proximal ends ot the astragalus and cal- 

 caneum respectively. 



The Extensor Cruris lies along and is partly covered by the 

 tibialis anticus. It arises by a long tendon from the condyle of 

 the femur and runs in a groove in the upper end of the tibia 

 and is inserted into the extensor surface of the tibia along 

 nearly its whole length. 



The Peroneus is a stout muscle which lies between the 

 tibialis anticus and the gastrocnemius. It arises from the distal 

 end of the femur and is inserted into the outer malleolus of 

 the tibia and the proximal end of the calcaneum. 



268. Dissection of the Sciatic Nerve. Expose the 

 muscles of the dorsal aspect of the thigh, carefully separate 

 the biceps and semimembranosus ; closely applied to the deeper 



/em 



u-r 



Sarue muscle pr^jparation. 



Fig. 5 



