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Henry Gray (1825–1861).  Anatomy of the Human Body.  1918.
 
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 membrane; the upper, by that of the distal radioulnar articulation, the under, by that of the wrist.


FIG. 334– Ligaments of wrist. Anterior view (See enlarged image)


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.


FIG. 335– Ligaments of wrist. Posterior view. (See enlarged image)


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

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