Components of the lateral ligament complex of the elbow
Radial collateral ligament, lateral ulnar collateral ligament (LUCL), and annular ligament. The annular ligament is attached to the ulna and wraps around the radial head, acting as the primary stabilizer of the radioulnar joint and preventing dislocation of the radial head. The radial collateral ligament extends in a fan shape from the lateral epicondyle to the annular ligament. The LUCL arises from the posterior aspect of the lateral epicondyle and extends around the posterior aspect of the radial head and neck to the ulna.