Radial Collateral Ligament of Elbow

Author: Dr Peter de Souza
Last modified: 13 December 2020

Radial Collateral Ligament of Elbow

The structure indicated is the radial collateral ligament of the elbow.

The fibrous joint capsule which surrounds the elbow joint is reinforced medially and laterally, where it thickens to form the collateral ligaments – the radial collateral ligament and the ulnar collateral ligament.

Surrounding the radial head is the annular ligament, the fibres of which blend with the fibres of the radial collateral ligament. Because of the way the joint capsule is thickened to form ligaments with blended fibres, the elbow ligaments on the lateral aspect of the elbow are often referred to collectively as the lateral collateral ligament complex (LCLC), which consists of four ligaments:

  1. Radial collateral ligament (RCL)
  2. Lateral ulnar collateral ligament (LUCL)
  3. Accessory lateral collateral ligament (ALCL)
  4. Annular ligament (AL)

The radial collateral ligament attaches at one end to the lateral epicondyle of the humerus and at the other end attaches to the lateral part of the annular ligament, the radius and also the ulnar.

Learn more about the anatomy of the radial collateral ligament in this tutorial on the elbow joint.

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