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The dorsal radioulnar ligament (posterior radioulnar ... This article incorporates text in the public domain from page 325 of the 20th edition of Gray's Anatomy (1918)
There are two RULs: the palmar and dorsal radioulnar ligaments. [citation needed] These ligaments arise from the distal radius medial border and insert on the ulna at two separate and distinct sites: the ulna styloid and the fovea (a groove that separates the ulnar styloid from the ulnar head).
The interosseous membrane is composed of 5 ligaments:- Central band (key portion to be reconstructed in case of injury)- Accessory band- Distal oblique bundle- Proximal oblique cord- Dorsal oblique accessory cord. Severe forearm injuries involving separation of the radius and ulna may be due to rupture of the interosseous membrane.
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 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 distal radioulnar articulation [1] (also known as the distal radioulnar joint, [2] or inferior radioulnar joint [1] [3]) is a synovial pivot joint between the two bones in the forearm; the radius and ulna. It is one of two joints between the radius and ulna, the other being the proximal radioulnar articulation.
In humans, the main task of the elbow is to properly place the hand in space by shortening and lengthening the upper limb. While the superior radioulnar joint shares joint capsule with the elbow joint, it plays no functional role at the elbow. [7] With the elbow extended, the long axis of the humerus and that of the ulna coincide. [20]
Beneath the neck of the radius, on the medial side, is an eminence, the radial tuberosity; its surface is divided into: . a posterior, rough portion, for the insertion of the tendon of the biceps brachii.
Radioulnar ligament can refer to: Dorsal radioulnar ligament (ligamentum radioulnare dorsale) Palmar radioulnar ligament (ligamentum radioulnare palmare)