MUSCLES OF THE FOOT. 461 



The, Flexor Brevis Digilorum Pedis, 



Arises, fleshy, from the large tuberosity of the os calcis, by a 

 narrow beginning; also from the upper surface of the aponeu- 

 rosis plantaris, and the tendinous septa between it and the con- 

 tiguous muscles. 



It forms a fleshy belly, going nearly as far forwards as the 

 middle of the metatarsal bones ; there it divides into four tendons, 

 which go to the four smaller toes.. These are perforated by the 

 tendons of the flexor longus, and are inserted into the sides of 

 the second phalanges. The tendon for the little toe is often de- 

 ficient. 



It bends the second joint of the toes. 



By detaching this muscle from its origin, and turning it down, 

 we bring into view the tendon of the Flexor Longus Digitorum 

 Pedis; and the attachment of the latter to the tendinous slip from 

 the Flexor Longus Pollicis, to the Massa Carnea Jacobi Sylvii, 

 or Flexor Accessorius, and to the Lumbricales Muscles. 



The Flexor *flccessorius, 



Is at the outside of the tendon of the flexor longus. It arises, 

 fleshy, from the inside of the sinuosity of the os ealcis, and, by 

 a thin tendon, from the outside of the same bone before its tu- 

 berosities. 



It is inserted, fleshy, into the outside of the tendon of the flexor 

 longus, just at its division into four tendons. Like a second hand 

 to a rope, it assists in flexing the toes. 



The Lumbricales Pedis, 



Are four small tapering muscles, which arise from the tendon 

 of the flexor longus, just after its division, or while it is in the 

 act of dividing. One of them is appropriated to each lesser toe, 

 and is inserted into the inside of its first phalanx, and into the 

 tendinous expansion that is sent off from the extensor muscles to 

 cover its dorsum. 



They increase the flexion of the toes, and draw them inwards. 



39* 



