Radius (bone)
585732
218083397
2008-06-09T02:08:44Z
Thijs!bot
1392310
robot Adding: [[hu:Orsócsont]]
{{Infobox Bone |
Name = Radius (joint) |
Latin = |
GraySubject = 52 |
GrayPage = 219 |
Image = Illu_upper_extremity.jpg |
Caption = Upper extremity |
Image2 = Carpus.png |
Caption2 = Radius is #1 |
Articulations = |
MeshName = Radius |
MeshNumber = A02.835.232.087.090.700 |
DorlandsPre = |
DorlandsSuf = |
}}
The '''radius''' is the [[bone]] of the [[forearm]] that extends from the lateral side of the [[Elbow-joint|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, [[Prism (geometry)|prismatic]] in form and slightly curved longitudinally. The radius articulates with the capitulum of the [[humerus]].
The word "''radius''" is [[Latin (language)|Latin]] for "ray." In the context of the radius bone, a ray can be thought of rotating around an axis line extending diagonally from centre of [[Capitulum of the humerus|capitulum]] to the centre of distal [[ulna]].
It has a body and two extremities:
* [[Body of radius]]
* [[Upper extremity of radius]]
* [[Lower extremity of radius]]
== 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 ==
*[[Bone#Terminology|Bone terminology]]
*[[Terms for anatomical location]]
*[[Ossification of radius]]
==Additional images==
<gallery>
Image:Radius ant.jpg|Radius l. dx. - ant. view
Image:Radius post.jpg|Radius l. dx. - post. view
Image:RightHumanPosteriorRadiusUlna.jpg|Right human radius and ulna - post. view
Image:Human arm bones diagram.svg|Human arm bones diagram
Image:Gray213.png|Bones of left forearm - ant. view
Image:Gray214.png|Bones of left forearm - post. view
Image:Gray329.png|Left elbow-joint, showing anterior and ulnar collateral ligaments
Image:Gray420.png|The Supinator
Image:Gray417_color.PNG|Cross-section through middle of forearm
Image:Gray421.png|Transverse section across distal ends of radius and ulna
</gallery>
== External links ==
* [http://www.aofoundation.org/wps/portal/surgeryskully Radial fractures]
{{Gray's}}
{{Bones of upper extremity}}
[[Category:Long bones]]
[[Category:Upper limb anatomy]]
{{anatomy-stub}}
[[ar:كعبرة]]
[[ca:Radi (anatomia)]]
[[cs:Vřetenní kost]]
[[de:Radius (Anatomie)]]
[[es:Radio (hueso)]]
[[fr:Radius (os)]]
[[id:Tulang pengumpil]]
[[it:Radio (anatomia)]]
[[he:עצם החישור]]
[[la:Radius (anatomia)]]
[[lt:Stipinkaulis]]
[[hu:Orsócsont]]
[[nl:Spaakbeen]]
[[ja:橈骨]]
[[no:Spolebein]]
[[pl:Kość promieniowa]]
[[pt:Rádio (osso)]]
[[sk:Vretenná kosť]]
[[sl:Koželjnica]]
[[fi:Värttinäluu]]
[[sv:Strålben]]
[[te:రత్ని]]
[[th:กระดูกเรเดียส]]
[[uk:Променева кістка]]
[[zh:桡骨]]