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Bone Forearm

Radius

radius

The radius is the lateral bone of the forearm that rotates around the ulna to produce supination and pronation of the forearm, articulating with the humerus at the radial head proximally and with the carpal bones distally.

Region: Forearm
Clinical Relevance

Clinical Notes

The radius bears 80 percent of wrist load. Distal radius fractures are the most common upper limb fractures — Colles (dorsal angulation in elderly), Smith (volar angulation), and Barton (intra-articular with rim fragment). Lister tubercle is the EPL pulley and site of spontaneous EPL rupture after minimally displaced fractures. Radial head fractures (Mason classification) are the most common adult elbow fracture. Galeazzi fractures (distal radius shaft fracture + DRUJ dislocation) require surgical fixation.

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