RADIO-ULNAR. 



293 



Actions. The movement which occurs in the inferior radio-ulnar articulation 

 is just the reverse of that which takes place between the two bones above ; it is 



Fig. 201. Ligaments of Wrist and Hand. Anterior Yiew. 



MFER10R RADIO-ULNAR ARTICf 



WRIST-JOINT 



CARPAL ARTIC?? 



CARPO-METACABPAL ARTIC 



limited to rotation of the radius round the head of the ulna ; rotation forwards 

 being termed pronation, rotation backwards s upination. In pronation, the sig- 



Fig. 202. Ligaments of Wrist and Hand. Posterior View. 



Inferior 

 JLadio -uina.r Artie 



moid cavity glides forward on the articular edge of the ulna ; in supination, it 

 rolls in the opposite direction, the extent of these movements being limited by 

 the anterior and posterior ligaments. 



