THE WPJST-JOIXT. 



i',r> 



The Carpal Articulations. — The bones of the carpus, the pisiform 

 excepted, are so arranged in two rows, that while only slij^iit movement 

 can take place between the members of each row, a considerable amount 

 of movement is possible between the two rows. The surface presented 

 bj' the first row to the second is concave both transversely and from 

 before backwards in the greater part of its extent, but at its outer side 

 it is bounded by the convex part of the scaphoid bone. The opjiosing 

 surface of the second row is concavo-convex from without inwards, the 

 concavity being formed by the trapezium and trapezoid, the convexity 

 by the OS magnum and unciform bone. 



Fig. 141. 



Fig. 141, A. — DoKSAi, VIEW of the dkeper Ligamknts op the Wkist-Juixt, ani> op 

 THE Carpal and Carpo-Metacarpal Articulations. (A. T., after Arnold). | 



1, lower part of tie ul-.a ; 2, external lateral ligament of the wrist-joint ; 3, internal ; 

 near it descending ( bli luely to 6, from the radius, the dorsal radio-carpal ligament ; 

 4 to 5, transverse dorsal ligaments of the tii-st row ; 4, is on the scaphoid ; 5, on the 

 semilunar bone ; 6, cuneiform bone, with the attachment of the dorsal radio-cari)al liga- 

 ment ; 7, trapezium ; S, trapezoid ; 9, os magnum ; 10, unciform ; 11 to 15, first to fiftli 

 metacarpal bones ; 7 to 8, 8 to 9, and 9 to Id, transverse dorsal ligaments of the secoml 

 row of carjial bones ; 4 to 8, 4 to 9, 5 to 9, and others, dorsal ligaments between the first 

 and second row ; 8 to 12, 9 to 13, and others, dorsal ligaments from the second row to 

 the metacarpal bones ; between the metacai'iial bones, from 11 to 15, the dorsal inter- 

 metacarpal ligaments. 



Fig. 141, B. — Palmar view of the Ligaments of the Wrist-Joint, and of xhk 

 Carpal and Carpo-Metacarpal Articulations. (A. T.) .^ 



The anterior radio-carpal ligament has been lemoved : 1, anterior ligament of the lo\\er 

 radio-ulnar articulation ; 2, external, and 3, internal lateral ligament of the wrist-joint ; 

 4, scaphoid bone ; 5, semilunar ; 6, cuneiform ; 7, pisiform, with the tendon of Hexor 

 carpi \ilnaris attached : 4 to 5, and 5 to 6, palmar transverse ligaments of the first row- ; 

 8, external lateral ligament between the first and second row of cari)al bones ; 9, trape- 

 zium (the trapezoid is not numbered) ;' 10, os magnum ; 11, hooked process of the unciform 

 bone, 9 to lU, 10 to 11, and others, transverse palmar ligaments of the second row ; 4 to 

 10, and 6 to 10, some of the palmar ligaments uniting the two rows, converging on the os 

 magnum ; 7 to 11, ligament from the pisiform bone to the unciform process ; 7 to 16, 

 ligament from the pisiform to the fifth metacarpal bone ; 12, external ligament of the 

 first canw-iMetacai-pal articulation, the internal of which is also shown : 13, 14, 15, 16, 

 the proximal ends of the second to the fifth metacarpal bones, on whiel* the palmar trans- 

 verse, and on three of them, a set of piso-metacarpal ligaments are shown. 



