SYNDESMOLOGY 



cave and smooth, forms part of the wrist-joint and articulates with the triangular 

 bone and medial part of the lunate. Both surfaces are clothed by synovial mem- 

 brane; the upper, by that of the distal radioulnar articulation, the under, by that 

 of the wrist. 



Distal radio-ulnar 

 articulation 



Wrist-joint 



Intercarpal articulations 



Pisohamate ligament 

 Pisometacarpal ligament 



Carpometacarpal 

 articulations 



Fia. 334. Ligaments of wrist. Anterior view 



Synovial Membrane (Fig. 336). The synovial membrane of this articulation is extremely 

 loose, and extends upward as a recess (recessus sacciformis) between the radius and the ulna. 



Distal radio-ulnar, 

 articulation 



Intercarpal articulations 



Carpometacarpal 

 articulations 



FIG. 335. Ligaments of wrist. Posterior view. 



Movements. The movements in the distal radioulnar articulation consist of rotation of the 

 lower end of the radius around an axis which passes through the center of the head of the ulna. 

 When the radius rotates forward, pronation of the forearm and hand is the result; and when back- 

 ward, supination. It will thus be seen that in pronation and supination the radius describes the 



