REGIONAL ANATOMY 



19 



by the superior carpal ligament, passes through the carpal 

 and metacarpophalangeal sheaths, and. arriving behind 



Fig. 11. — The Flexor Perforans and Flexor Perforatus 

 Tendons. 



The metacarpophalangeal sheath and the ring of the perforatus 

 laid open posteriorly, and the cut edges reflected to show the 

 passage of the perforans. 



i. Reflected cut edges of the perforatus ring and the metacarpo- 

 phalangeal sheath ; 2, the perforans tendon ; 3, point of insertion 

 of the perforans tendon into the semilunar crest of the os pedis 

 (this widened and thickened extremity of the perforans is known 

 as the plantar aponeurosis). 



the fetlock, forms a ring for the passage of the flexor 

 perforans. Its termination is bifid, and it is inserted on 

 either side to the lateral surface of the second phalanx. 



