42 



LOCOMOTOR APPARATUS OF THE FOOT. 



from the ligaments, with which it forms a most intimate con- 

 nection. A smaller portion extends 

 to the lateral surface of the suffra- 

 ginis bone just above its lower end. 

 The tendon, therefore, acts not only 

 on the coronet, but also on the suffra- 

 ginis bone. 



3. The Flexor Pedis Perforans 



Tendon 



(Figs. 26, a, 27, c) 



Is described by German anatomists 

 as arising in the fore -limb from five, 

 and in the hind- limb from three 

 masses of muscle. During its course 

 behind the metacarpus, it is rounded 

 and lies between the perforatus tendon 

 and superior sesamoidean ligament. 

 It passes through the ring formed by 

 the perforatus tendon (fig. 26, h'), 

 glides over the articular surface of 

 the sesamoid bones, here losing its 

 rounded shape, and becoming broad 

 and double-edged, next makes its way 

 through the opening formed by the 

 division of the perforatus tendon (fig. 

 27), here being in contact with the 

 smooth surface formed by the fibrous 

 mass clothing the posterior surface 

 of the coronet bone (fig. 26, e), and 

 beino; marked on its anterior surface 

 by a crescent-shaped prominence 

 (fig. 26, a''), to which the synovial 

 sheath is attached ; it then proceeds 

 as a broad fan-shaped tendon (fig. 

 26, a^) over the navicular bone (c), as 

 over a pulley, completely covering 

 the bone. At this point it exhibits 

 a deep furrow, corresponding to the 



Fig. 26. — Posterior view of right 

 fore-foot, rt, lower end of flexor 

 pedis perforans tendon cut through 

 and drawn downwards ; a', ex- 

 panded portion which becomes 

 attached to pedal bone ; a", depres- 

 sion for reception of the rounded 

 prominence of tlie navicular bone ; 

 a'", isolated section of flexor pedis 

 perforans tendon surrounded by 

 tendinous ring b' ; h, flexor pedis 

 perforatus tendon ; b' , its fibrous 

 ring ; h", its terminal limbs, be- 

 tween which passes the flexor p. 

 perforans tendon ; c, navicular 

 bone ; d, its postero-lateral liga- 

 ments ; e, posterior face of coronet 

 bone, over which glides the per- 

 forans tendon ; /, gliding surface 

 formed by intersesamoidean liga- 

 ment ; g, superior sesamoidean or 

 suspensory ligament; g' , its in- 

 sertions into the sesamoid bones. 



