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]]