768 



MUSCLES OF THE FOOT. 



into the base of the smaller toes at the first phalanx and 

 expansion of the extensor tendons. 



FIG. 255. 



THIRD LAYER. 



The flexor Irevis pollicis (Fig. 255) arises by two heads, 

 between which the tendon of the long flexor passes, from 

 the lower surface of the os calcis and 

 external cuneiform bone. It forms a 

 fleshy belly, connected with the abduc- 

 tor and adductor pollicis, and is inserted 

 into the two sesamoid bones at the first 

 phalanx of the great toe. 



Function. To flex the first joint of 

 the great toe. 



The adductor pollicis (Fig, 255) 

 arises, tendinous and fleshy, on the 

 outside of the ]ast, from the calcaneo- 

 cuboid ligament, and base of the second 

 and third metatarsal bones, and is in- 

 serted into the external sesamoid and 

 base of the first phalanx of the great 

 toe. Function. To bring the great 

 toe towards the rest. 



The transversalis pedis arises from 

 the heads of the four lesser metatarsal bones by fleshy slips, 

 which running transversely are inserted into the base of 

 the first phalanx of the great toe. Function. To approxi- 

 mate the toes. 



The flexor brevis minimi digiti (Fig. 255) arises tendinous 

 and fleshy from the cuboid and base of the fifth metatarsal 

 bone, and is inserted into the base of the first phalanx of 

 the little toe. Function. To flex the little toe. 



FIG. 255 represents the second, third and fourth layers of muscles on the sole 

 of the foot, a Tendon of tibialis posticus. b Tendon of flexor longus pollicis. 

 c Tendon of flexor longus digitorum. d Division of the latter into four tendons. 

 e Their points of insertion. /Flexor accessorius. g Calcaneo cuboid ligament. 

 h Lumbricales pedis. i Abductor pollicis. j Flexor brevis pollicis. k Tendon 

 of peroneus longus. I Flexor brevis minimi digiti. m Interossei. 



