Distal radioulnar joint

The distal radioulnar joint is a pivot type synovial joint between the distal radius and ulna.

  • articulation: pivot type synovial joint between the distal aspect of the radius and the ulna
  • ligaments: triangular ligament, and anterior and posterior distal radio-ulnar ligaments
  • movements: rotation of the distal radius
  • blood supply:  anterior and posterior interosseous arteries
  • nerve supply: anterior and posterior interosseous nerves
Articulation

The distal radioulnar joint is a pivot type synovial joint existing between the ulnar notch of the distal radius and the head of the ulna. The primary uniting structure of the joint is the articular disc of the distal radioulnar joint, also termed the triangular ligament 1 (part of the Triangular fibrocartilage complex (TFCC)).

Ligaments and tendons

The distal radioulnar joint has intrinsic and extrinsic stabilising structures.

Intrinsic

  • anterior and posterior distal radioulnar ligaments
  • distal radioulnar joint capsule

Extrinsic

Movement

The primary movement of the distal radioulnar joint is to allow pronation and supination of the forearm.

Pronation: pronator quadratus, pronator teres

Supination: supinator, biceps brachii

The blood supply to the distal radio-ulnar joint is provided by the:

The nervous supply to the distal radio-ulnar joint is provided by the:


Upper limb anatomy
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Article Information

rID: 46555
Section: Anatomy
Tags: refs, cases
Synonyms or Alternate Spellings:
  • Distal radioulnar joint (DRUJ)

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