The Anatomical Structure And Location Of The Capitulum Of The Humerus

Description

Rotating around the distal brachium, the animation isolates the capitulum humeri as a smooth, rounded eminence on the anterolateral aspect of the distal humerus. Proximally, the shaft flares into the lateral supracondylar ridge and the lateral epicondyle, while medially the trochlea projects farther inferiorly to meet the ulna. As the viewpoint sweeps, the capitulum remains lateral to the trochlea and anterior to the olecranon fossa, clarifying how its articular surface wraps from the anterior distal humerus onto the inferior margin to accept the radial head in flexion. Key borders come into focus as the sequence progresses. Understanding the capitulum’s contour matters when you are teaching elbow kinematics or evaluating trauma around the radiocapitellar joint. Osteochondritis dissecans of the capitellum (common in adolescent throwing athletes and gymnasts) and occult radial head fractures often declare themselves by pain and effusion at the lateral elbow, where radiocapitellar congruence and cartilage integrity drive symptoms. Motion adds clarity here: seeing the radial head track against the capitulum through flexion and extension makes it easier to explain why a small chondral defect or subtle malalignment can limit pronation and supination and produce mechanical catching. Use this animation for upper-limb anatomy labs, orthopedic teaching on distal humerus landmarks, or as a visual companion in a radiology module correlating AP and lateral elbow projections with the bony anatomy clinicians palpate and operate around. It also supports patient-facing education when discussing lateral elbow pain after a fall onto an outstretched hand or overuse injuries in overhead sports. Anatomical accuracy verified by SciePro's Medical Advisory Board.