Ulnar notch of the radius

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Ulnar notch of the radius
Gray213.png
Bones of left forearm. Anterior aspect. (Ulnar notch visible but not labeled.)
Latin incisura ulnaris radii
Gray's subject #53 220

The articular surface for the ulna is called the ulnar notch (sigmoid cavity) of the radius; it is in the distal radius, and is narrow, concave, smooth, and articulates with the head of the ulna forming the distal radioulnar joint.

This article incorporates text from a public domain edition of Gray's Anatomy.