Distal radioulnar articulation

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(Redirected from Inferior radioulnar joint)

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== Distal Radioulnar Articulation ==

The distal radioulnar articulation is a joint located between the distal ends of the radius and ulna bones in the forearm. This joint plays a crucial role in the pronation and supination movements of the forearm, allowing the hand to rotate so that the palm can face up or down.

Anatomy[edit | edit source]

The distal radioulnar articulation is a type of synovial joint, specifically a pivot joint. It is formed by the head of the ulna and the ulnar notch of the radius. The joint is enclosed by a fibrous capsule and is supported by several important ligaments:

  • The palmar radioulnar ligament, which extends from the anterior margin of the ulnar notch of the radius to the anterior surface of the head of the ulna.
  • The dorsal radioulnar ligament, which extends from the posterior margin of the ulnar notch of the radius to the posterior surface of the head of the ulna.

Function[edit | edit source]

The primary function of the distal radioulnar articulation is to facilitate the rotational movements of the forearm. During pronation, the radius crosses over the ulna, and during supination, the radius and ulna are parallel. This joint, along with the proximal radioulnar articulation, allows for the full range of rotational motion.

Clinical Significance[edit | edit source]

Injuries or conditions affecting the distal radioulnar articulation can significantly impair forearm and wrist function. Common issues include:

Related Structures[edit | edit source]

The distal radioulnar articulation is closely associated with other structures in the forearm and wrist, including:

See Also[edit | edit source]


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