MUSCLES OF FOREARM 



25 



and encircling the head of the radius; the lower edge of the 

 ring is smaller than the upper, so that the radius is as it were 

 suspended by its head. 



Accessory Ligament : Oblique ligament, a thin band from the 

 outer surface of the coronoid process of the ulna to the radius, 

 where it is attached just below the bicipital tuberosity. 



The synovial membrane lines the joint, and is continuous with 

 that of the elbow-joint. 



Inferior Radio-Ulnar Joint, between the inner surface of the 

 inferior end of the radius and the outer surface of the inferior 

 end of the ulna; the inferior surface of the lower end of the 

 ulna is also included in the joint by means of the articular disc 

 of cartilage which excludes the ulna from the wrist-joint. 



MUSCLES ACTING ON THE RADIO-ULNAR JOINTS. 



