56 



WRIST JOINT. 



in an opposite direction to those of the interosseous ligament. It 

 commences at the coronoid process, and terminates below the tuber- 

 cle of the radius. 



Fig. 39. 



Fig. 40. 



Fig. 41. 



Sacciform Ligament. — Is a loose capsular ligament, proceeding 

 from the lower extremity of the ulna with the lesser sigmoid cavity 

 of the radius. This is strengthened by the anterior radio-ulnar 

 ligament^ (Fig. 42), which passes obliquely between the two bones, 

 and the posterior radio-ulnar ligament. 



WRIST JOINT. 



This joint is formed by the greater sigmoid cavity of the radius, 

 and the scaphoid, semilunar, and cuneiform bones ; and is surrounded 

 by the capsular ligament, which is strengthened by an anterioi' 

 ligament^ (Fig. 42), a broad membranous layer; an internal lateral 

 ligameni^^ reaching from the styloid process of the ulna to the 

 cuneiform and pisiform bone ; an external lateral ligament^*' reach- 

 ing from the styloid process of the radius to the scaphoid bone ; 

 and a posterior ligament^ which is thin and loose, passing be- 

 tween the posterior surface of the radius, semilunar, and cuneiform 

 bones. 



