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head of radius
The head of the radius has a cylindrical form, and on its upper surface is a shallow cup or fovea for articulation with the capitulum of the humerus. The circumference of the head is smooth; it is broad medially where it articulates with the radial notch of the ulna, narrow in the rest of its extent, which is embraced by the annular ligament.〔''Gray's Anatomy'' (1918), see infobox〕
==Articular surfaces==
The head of the radius is shaped to articulate with a complex of articular surfaces during both flexion-extension at the elbow and supination-pronation in the forearm:
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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