Distal radioulnar articulation

Distal Radioulnar Articulation

The Distal Radioulnar Articulation is a pivotal joint located between the two bones of the forearm, the radius and the ulna. This joint allows for the rotation of the forearm and the hand, enabling pronation and supination.

Distal radioulnar articulation

Anatomy

The distal radioulnar articulation is formed by the head of the ulna and the ulnar notch on the lower end of the radius. The articular disk, or triangular fibrocartilage complex (TFCC), is attached to the lower margin of the ulnar notch and separates the joint from the wrist joint.

Function

The primary function of the distal radioulnar articulation is to allow for pronation and supination of the forearm. This is achieved through the rotation of the radius around the ulna.

Clinical Significance

Injuries to the distal radioulnar articulation can result in limited movement and pain. Common injuries include fractures, dislocations, and sprains. Treatment may involve immobilization, physical therapy, or surgery.

See Also

• Radius (bone)
• Ulna
• Pronation
• Supination