FOREARM AND HAND 



153 



M. Abductor Digit! Quinti. The abductor is the largest 

 of the three short muscles of the little finger. It arises from 

 the pisiform bone, and is inserted into the medial side of 

 the base of the first phalanx of the little finger. 



M. Flexor Digiti Quinti Brevis. The short flexor of 

 the little finger is a muscle of very variable size. It springs 

 from the hook of the os hamatum and the adjacent part 

 of the distal border of the transverse carpal ligament, and is 

 inserted, with the abductor digiti quinti, into the medial side 



Os capitatum Os lunatum 

 Os multangulum minus 

 Os naviculare manus 

 Abductor pollicis brevis 

 Os multangulum maju 



Opponens pollicis 

 Abductor pollicis longus 



Flexor carpi radialis 



s hamatum 

 Os triquetrum 

 Flexor carpi ulnaris 

 Os pisiforme 

 Abductor digiti quinti 

 Flexor digiti 

 quinti brevis 



exor carpi ulnaris 



Opponens digiti quinti 



Palmar interossei 



M.I. 



Adductor pollicis 



FIG. 67. Volar aspect of the Bones of the Carpus and Metacarpus 

 with Muscular Attachments mapped out. 



of the base of the first ohalanx of the little finger. It is 

 not uncommonly incorporated, to a greater or less extent, 

 with the opponens digiti quinti. 



M. Opponens Digiti Quinti. The opponens of the little 

 finger lies on a deeper plane than the short flexor. It arises 

 from the hook of the os hamatum and the distal border of 

 the transverse carpal ligament, and is inserted into the whole 

 length of the medial part of the volar aspect of the meta- 

 carpal bone of the little finger. 



Dissection. After the short muscles of the little finger have 

 been studied, clean away the slip of the palmar aponeurosis 



