Head of radius
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| Bone: Head of radius | |
|---|---|
 | |
| The radius and ulna of the left forearm, posterior surface. The top is proximal (elbow) and bottom is distal (wrist). | |
| Latin | caput radii |
| Gray's | subject #52 219 |
| Dorlands / Elsevier | c_08/12212240 |
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Overview
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 (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.
The deepest point in the fovea is not axi-symmetric with the long axis of the radius, creating a cam effect during pronation and supination.
External links
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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