LIGAMENTS OF THE WRIST AND METACARPUS. 



323 



The bases of the metacarpals, except the thumb, articulate with one another by 

 the lateral facets, and just below these joints are held together by strong interosseous 

 ligaments connecting the rough depressions below the bases. The fibres of the 



Fig. 342. 



Radio-caipal joint 



Intracarpal joint 

 (between scaphoid and os magnum ) 



Joint between trapezium and 

 first metacarpal 



Ulna 



Inferior radio-ulnar joint 



Triangular fibro-cartilage 



. Intracarpal joint 



' (between cuneiform and unciform) 



Carpo-metacarpal joint 



Carpal synovial sacs seen in longitudinal section. 



interosseous ligament from the trapezium to the trapezoid are inseparable from some 

 from the trapezium to the second metatarsal. 



A common description will best serve for the ligaments connecting the forearm, 

 the first row, the second row, and the bases of the metacarpals (Figs. 340, 341). 

 The simplest conception is of a capsule passing from the forearm to the metacarpus 

 and attached to the intervening bones. It is much strengthened by neighboring 



