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The radius is a long bone in the forearm. It lies laterally and parallel to ulna, the second of the forearm bones. The radius pivots around the ulna to produce movement at the proximal and distal radio-ulnar joints.
Radius distal aspect. The lower (distal) end of your radius forms the top of your wrist joint. It’s wider than the rest of your radius where it meets your scaphoid and lunate (wrist or carpal bones). The distal end of the radius includes: Styloid process. Ulnar notch.
Like the radius, the ulna also has three main parts: a proximal end, shaft and a distal end. The proximal end articulates with the distal humerus and the head of the radius. The distal end, on the other hand, has a head which articulates with the distal radius.
The terms proximal and distal are used in structures that are considered to have a beginning and an end (such as the upper limb, lower limb and blood vessels). They describe the position of a structure with reference to its origin – proximal means closer to its origin, distal means further away.
What is the radial bone facts, where is the radius located in arm, what does it do, anatomy (type, parts, joints formed), labeled diagram and x-ray image.
The distal epiphysis of the radius (far end at the wrist) averages about an inch wide. The proximal epiphysis (the end at the elbow) is about half as wide. As described above, the radius is a typical long bone with dense, hard bone along the shaft (diaphysis).
The most proximal segment of the radius is the radial head. The head is cylindrical and contains the articular disc which articulates with the humeral capitulum and radial notch of the ulna. Distal to the radial head is the neck of the radius and radial tuberosity - an oval prominence that is the site of attachment of the biceps brachii muscle.
The radius is slightly smaller than the ulna and pivots around the ulna to produce movement at the proximal and distal radioulnar joints. Proximally, the radius terminates with a disk-shaped head that articulates with the capitulum of the humerus and the radial notch of the ulna.
The proximal end of the radius is the upper end that articulates with the ulna and humerus at the elbow joint. The distal end of the radius is the lower end that articulates with the bones of the wrist, including the scaphoid, lunate, and triquetrum.
The radius is one of two large bones in the forearm. It is located laterally and extends from the elbow to the wrist. The elbow articulates in 4 places: Elbow – with the capitulum of the humerus; Proximal radioulnar joint; Distal radioulnar joint; Wrist – with the scaphoid and lunate (proximal carpal bones)