Annular Ligament Of The Elbow, Anterior View

Description

Anteriorly, the annular ligament (ligamentum anulare radii) forms a dense ring around the radial head, spanning from the anterior margin of the radial notch of the ulna to its posterior margin and completing the proximal radioulnar joint. The radial head sits lateral to the ulnar trochlear notch, while the radial neck continues distally beneath the ligament as it transitions toward the interosseous membrane of the forearm. Expect the capsule of the elbow joint to blend with the annular fibers near the proximal radioulnar recess, with the radial collateral ligament complex lying laterally in close relationship. Clear orientation. This anterior perspective matters because it frames the annular ligament as the primary soft-tissue restraint maintaining radial head apposition during pronation and supination, while still permitting rotation against the ulna. In pediatric radial head subluxation (nursemaid’s elbow), traction on the pronated, extended forearm can allow the radial head to slip partially from the annular ring, making the contour and attachment sites of the ligament the key teaching point during reduction maneuvers. Surgeons also reference this anatomy when addressing posterolateral rotatory instability or when planning exposure around the radial head, where preserving stabilizers helps prevent iatrogenic proximal radioulnar instability. Use this asset in upper limb gross anatomy modules, orthopedic teaching files on radial head subluxation and elbow instability, and in surgical education material covering lateral elbow approaches and radial head procedures. It also fits well in radiology correlation pieces that explain why small capsuloligamentous injuries can produce disproportionate loss of forearm rotation. Anatomical accuracy verified by SciePro's Medical Advisory Board.