Tags: Anatomical Structure, Bone.
The upper extremity of the radius (or proximal extremity) presents a head neck and tuberosity. The radial head has a cylindrical form and on its upper surface is a shallow cup or fovea for articulation with the capitulum (or capitellum) 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.
