Home Body Atlas Ligaments MCP Radial Collateral Ligament (Ring)
Ligament Hand & Wrist

MCP Radial Collateral Ligament (Ring)

ligamentum collaterale radiale articulationis metacarpophalangealis annularis

The radial collateral ligament of the ring finger MCP joint provides radial stability to the ring MCP articulation, resisting ulnar deviation forces.

Region: Hand & Wrist
Biomechanics

Function & Actions

Stabilises the ring MCP joint against ulnar deviation, contributes to the overall finger alignment during power grip, and is one of the four radial MCP collateral ligaments that attenuate uniformly in rheumatoid arthritis.

Clinical Relevance

Clinical Notes

Ring finger MCP radial collateral laxity in rheumatoid arthritis contributes to the global ulnar drift pattern. In MCP arthroplasty for rheumatoid hand, the radial collateral ligament is reconstructed during component placement to restore symmetric collateral constraint.

Pathology

Common Injuries & Conditions

Ring Finger MCP Ulnar Drift in RA

Ring finger MCP radial collateral attenuation in rheumatoid arthritis contributing to global digital ulnar drift, requiring MCP arthroplasty with collateral reconstruction.

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