VIII.] 



THE MUSCLES. 



305 



A remarkable muscle, the peroneus longus, arises from 

 the outer, upper two-thirds of the fibula and from the ex- 

 ternal tuberosity of the tibia. It ends in a tendon which 

 passes behind the external malleolus, and then obliquely 

 across the sole of the foot to the first metatarsal. 



The peroneus brevis springs from the outer, lower half of 

 the fibula, and ends in a tendon which, also passing behind 



FIG. 280. SUPERFICIAL FLEXOR MUSCLES OF RIGHT LEG. 



i, tendon of semi-membranosus : 2, 2, heads of gastrocnemius ; 3, plantaris : 4, 

 soleus ; 5, great tendon of gastrocnemius, continuous below with (6) the tendo 

 Achillis ; 7. peroneus longus ; 8, peroneus brevis ; 9, flexor longus digitorum 

 pedis ; 10, tibialis posticus. 



the external malleolus, is inserted into the base of the fifth 

 metatarsal. 



Behind the leg we have seven muscles. 



The gastrocnemius (forming the bulk of the calf of the leg) 

 consists of two fleshy heads, arising each by a thick tendon 

 from above each of the condyles of the femur one external, 

 one internal. They unite and send down the very strong 



x 



