THE LOWER EXTREMITIES. 



197 



back of the upper fibula, and the plantaris, which comes 

 from the linea aspera, into the os calcis by a common ten- 

 don, the tendo Achillis, the largest and strongest tendon 

 in the body. Its action is to extend the foot and to 



FIG. 81. 



FIG. 82. 



FIG. 83 . 



FIG. 81. Superficial muscles of the leg from inner side: 1, Vastus internus; 2, 

 sartorius; 3, gracilis; 4, semitendinosus ; 5, semimembranosus; 6, inner head of 

 gastrocnemius; 7, soleus; 8, tendon of plantaris; 9, tendon of tibialis posticus; 10, 

 flexor longus digitorum; 11, flexor longus hallucis; 12, tibialis anticus; 13, ab- 

 ductor hallucis. (Borland's Dictionary.) 



FIG. 82. Muscles of leg and foot (from before): 1, Tendon of rectus femoris; 

 2, vastus internus; 3, vastus externus; 4, sartorius; 5, iliotibial band; 6, inner 

 head of gastrocnemius; 7, inner part of soleus; 8, tibailis anticus; 9, extensor 

 proprius hallucis; 10, extensor longus digitorum; 11, peroneus longus; 12, pero- 

 neus brevis; 13, peroneus tertius; 14, origin of extensor brevis digitorum. 

 (Borland's Dictionary.) 



FIG. 83. Superficial muscles of leg (from behind) : 1, Vastus externus; 2, biceps 

 flexor cruris; 3, semiteTidinosus; 4, semimembranosus; 5, gracilis; 6, sartorius; 7, 

 outer, and 8, inner, head of gastrocnemius; 9, plantaris; 10, soleus; 11, peroneus 

 longus; 12, peroneus brevis; 13, flexor longus digitorum; 14, tibialis posticus; 15, 

 lower fibers of flexor longus hallucis. (Dorland's Dictionary.) 



rotate it slightly inward. Other extensors of the foot, 

 which also evert it, are the peroneus longus and the 

 peroneus brevis at the upper and outer part of the leg, the 

 former rising from the outer tuberosity of the tibia and 



