Radius (bone)
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| Bone: Radius (joint) | |
|---|---|
 | |
| Upper extremity | |
 | |
| Radius is #1 | |
| Gray's | subject #52 219 |
| MeSH | Radius |
The radius is the bone of the forearm that extends from the outside of the limb to the phlangx (lateral) of the elbow to the thumb side of the wrist. The radius is situated on the lateral side of the ulna, which exceeds it in length and size. It is a long bone, prismatic in form and slightly curved longitudinally. The radius articulates with the capitulum of the humerus.
Sections
Its upper end is small, and forms only a small part of the elbow-joint; but its lower end is large, and forms the chief part of the wrist-joint.
It has a body and two extremities:
Structure
The long narrow medullary cavity is enclosed in a strong wall of compact bone which is thickest along the interosseous border and thinnest at the extremities except over the cup-shaped articular surface (fovea) of the head where it is thickened.
The trabeculae of the spongy tissue are somewhat arched at the upper end and pass upward from the compact layer of the shaft to the fovea capituli; they are crossed by others parallel to the surface of the fovea.
The arrangement at the lower end is somewhat similar.
See also
Additional images
Radius ant.jpg
Radius l. dx. - ant. view |
Radius post.jpg
Radius l. dx. - post. view |
RightHumanPosteriorRadiusUlna.jpg
Right human radius and ulna - post. view |
 Bones of left forearm - ant. view |
 Bones of left forearm - post. view |
 Left elbow-joint, showing anterior and ulnar collateral ligaments |
 The Supinator |
 Cross-section through middle of forearm |
 Transverse section across distal ends of radius and ulna |
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 As such, some of the information contained herein may be outdated.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.
ar:كعبرةca:Radi (anatomia) de:Radius (Anatomie)fr:Os radius id:Tulang pengumpil it:Radio (anatomia) he:עצם החישור la:Radius (anatomia) lt:Stipinkaulis nl:Spaakbeen ja:橈骨 no:Spolebeinsk:Vretenná kosť fi:Värttinäluu sv:Strålben th:กระดูกเรเดียส uk:Променева кістка
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
