What type of joint is the distal radio-ulnar joint?

The distal radio-ulnar joint is a pivot-type synovial joint. It works with the proximal radio-ulnar joint to enable forearm rotation.

What bones articulate at the distal radio-ulnar joint?

The joint involves two key surfaces: the convex head of the ulna and the concave ulnar notch of the radius.

What ligaments support the distal radio-ulnar joint?

Two main ligaments provide support: the capsular ligament, which encloses the joint, and the articular disc (triangular ligament), a fibrocartilaginous disc that separates it from the wrist joint.

What movements does the distal radio-ulnar joint allow?

This joint permits pronation and supination of the forearm. During rotation, the radius rotates around the stationary ulna.

What structures are located near the distal radio-ulnar joint?

Key anatomical relations include the flexor digitorum profundus muscle anteriorly and the extensor digiti minimi muscle posteriorly.

How is the distal radio-ulnar joint supplied with blood and nerves?

Blood supply comes from the anterior and posterior interosseous arteries. Nerve supply is from the anterior and posterior interosseous nerves.

What is the function of the articular disc in the distal radio-ulnar joint?

The articular disc, also called the triangular ligament, is a fibrocartilaginous structure that separates the distal radio-ulnar joint from the wrist joint, providing stability and compartmentalization.

Distal Radioulnar Joint – Anatomy & Articular Disc

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