Head Of The Radius, Posterior View

Description

Radial head anatomy fills the frame from a posterior elbow perspective, centering on the disc-shaped caput radii with its superior fovea for articulation with the capitulum of the humerus and the circumferential articular rim that meets the radial notch of the ulna at the proximal radioulnar joint. Immediately inferior lies the radial neck, tapering into the proximal shaft, while the lateral contour of the head reads as a smooth cylinder compared with the more irregular nonarticular bone distally. Posteriorly, the radial head sits lateral to the proximal ulna and inferior to the distal humerus, with the axis of the radius aligned for forearm rotation around the ulna. Fine bony curvature matters here. Radial head morphology drives both elbow stability and surgical decision-making after trauma, since Mason type fractures commonly involve the anterolateral quadrant yet are assessed and fixed with the forearm positioned to protect the posterior interosseous nerve as it passes through the supinator (Arcade of Frohse) just distal to the neck. The posterior perspective emphasizes the head-neck junction and the continuity of the articular rim, a practical reference when evaluating step-off, comminution, or overstuffing after radial head arthroplasty, which can restrict radiocapitellar congruence and limit pronation-supination. Consistent lighting across the cortical surface makes subtle contour changes readable. Orthopedic and anatomy faculty can place this illustration into upper limb modules covering the elbow joint, proximal radioulnar joint, and functional forearm rotation, or into fracture-management chapters discussing lateral elbow approaches and implant positioning. It also suits patient-facing handouts explaining why a “radial head fracture” affects both elbow flexion-extension and forearm rotation. Anatomical accuracy verified by SciePro's Medical Advisory Board.