Lower extremity of radius

Bone: Distal radius
The radius and ulna of the left forearm, posterior surface. The top is proximal (elbow) and bottom is distal (wrist).
Gray's subject #52 220

The distal end of the radius is large and of quadrilateral form.

Articular surfaces

It is provided with two articular surfaces - one below, for the carpus, and another at the medial side, for the ulna.

These two articular surfaces are separated by a prominent ridge, to which the base of the triangular articular disk is attached; this disk separates the wrist-joint from the distal radioulnar articulation.

Non-articular surfaces

This end of the bone has three non-articular surfaces - volar, dorsal, and lateral.

Additional images

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.