Body Of The Radius, Posterior View

Description

Radius (corpus radii) fills the frame in a posterior view, emphasizing the gentle lateral bow of the diaphysis along its long axis from proximal to distal. Medially, the sharp interosseous border (margo interosseus) stands out as a crisp ridge where the interosseous membrane spans to the ulna, while the lateral border appears smoother and more rounded. The posterior surface (facies posterior) reads as a broad, slightly convex field between these borders, with proximal and distal transitions hinted at by subtle changes in contour toward the head/neck region superiorly and the metaphyseal flare inferiorly. Surgeons and educators care about this curvature and the knife-like interosseous border because both influence forearm mechanics and fracture behavior, and malreduction of the radial bow after diaphyseal fractures measurably limits pronation and supination. Orientation from a posterior perspective helps distinguish the interosseous border from the anterior border, a common point of confusion when teaching osteology or correlating plain radiographs with dry bone anatomy. Hard edges read cleanly. That matters when you are explaining where the interosseous membrane anchors and how forces transmit across the radius-ulna unit. Use this illustration in upper limb osteology labs, orthopaedic teaching files covering radial shaft fracture patterns and fixation planning, and publishing workflows that need an accurate posterior reference for labeling the margo interosseus and facies posterior. It also supports exam prep and radiology correlation when learners must identify the radial bow and borders without relying on neighboring bones. Anatomical accuracy verified by SciePro's Medical Advisory Board.