Neck Of The Radius, Posterior View

Description

Radius anatomy at the proximal forearm is centered on the radial head and its neck (collum radii), viewed from posterior with the articular circumference superiorly and the smooth, narrowed neck immediately inferior. The radial neck sits distal to the head and proximal to the proximal shaft, tapering before the bone broadens toward the diaphysis. Posteriorly, the surface appears relatively feature-poor compared with the anterior aspect where the radial tuberosity lies inferomedial, but the relationship to the posterolateral elbow region and proximal radioulnar joint is still readable in a single frame. Radial neck morphology matters because it is a common site of injury in falls on the outstretched hand, where valgus load transmits through the capitulum to the radial head and neck, producing minimally displaced radial neck fractures that can still block forearm pronation and supination at the proximal radioulnar joint. Orthopedic teaching often hinges on recognizing how close the annular ligament and the posterior interosseous nerve are to this segment, and why aggressive retraction around the proximal radius during lateral approaches to the elbow can create neuropraxia. A tight posterior perspective keeps attention on the junction between the articular circumference and the narrowed neck, the area surgeons and radiologists use to judge subtle angulation. Use this illustration in upper-limb anatomy modules to anchor discussions of the elbow complex, in emergency medicine teaching files on radial head and neck fractures, and in orthopedic operative notes or implant catalogs that reference proximal radius landmarks and safe zones for exposure. It also suits musculoskeletal radiology publications when correlating plain-film findings with osseous contours at the proximal radius. Anatomical accuracy verified by SciePro's Medical Advisory Board.