THE WRIST AXD HAXD 



1169 



The posterior annular ligament is attached to the back of the outer margin 

 of the radius above the styloid process, and internally to the Vjack of the cuneiform 

 and pisiform. It contains six tendon-compartments, of which four are on the 

 radius. The outermost contains the two first extensors of the thund); the second 

 the two radial extensors of the carpus; the third, the extensor secundi internodii; 



Fig. 



734.— Section of Carpi-s, THKorcwi thk Uncifoum Bone^ (Two-thirds.) 

 (Bellamy after Henle. ) 



.MEDIA \ MCR VE 



Flexor longus pollicis 

 Flexor carpi radialis 

 Thenar muscles 

 BASE OF FIRST METACARPAL BONE 



Flexores sublimis and profundus 

 Ulnar itssels and y£Ji VE 



PalmariB brevia 



Hypothenar muscles 



Extensor ossis 

 metacarpi pollieie- 

 TRAPE2IUV 

 Extensor primi internodii 

 pollicis 



Radial vesseW 



Extensor carpi radialis longior 



Extensor carpi ulnaris 

 TRAPEZOID I I Extensor minimi digiti 



External carpi radialis brevior UNCFORV 



OS MAGNUM I Extensor communis digitorum 

 Extensor indicis 



the fourth transmits the extensor communis and extensor indicis; the fifth, lying 

 between the radius and ulna, the extensor minimi digiti; and the sixth, lying- just 

 outside the styloid process of the uhia, the extensor carpi ulnaris. The sheaths 

 for the last two extensors are the onlv ones which follow the tendons to their inser- 



FiG. 735. — Horizontal Section of the Hand through the Carpo-metacabpal 

 Joints. (Bellamy alter Heule.j 



Volar aponeurosis 

 Flexor tendon in the sheath InteroBseous 

 Deep volar aponeurosis 



Lumbrieales 

 Anterior carpal ligament 



Flexor tendon in the sheath 

 Seep volar aponeurosis I 

 Lumbricalis 



Lumbrieales 

 Flexor tendon in the sheath 



Lumbrieales 



Anterior carpal ligament 

 I Flexor tendon in the sheath 

 Hypothenar muscles 



tion, the others ending at a varying distance l)elow the annular ligament. The 

 lower border of the posterior corresjionds to the upper margin of tlie anterior 

 annular ligament. 



The palmar fascia, by its strength, toughness, numerous attachment^; .ind 

 74 



