The Dorsal Radial Tubercle Of The Radius From A Lateral View

Description

Seen from the lateral aspect of the distal forearm, the animation isolates the dorsal radial tubercle (Lister’s tubercle) on the posterior surface of the radius, just proximal to the articular margin of the radiocarpal joint. As the sequence rotates the bone, the tubercle is read as a raised ridge separating the extensor tendon grooves, with the extensor pollicis longus (EPL) course passing obliquely around its ulnar side while extensor carpi radialis longus and brevis tendons run more laterally. The relationship to the radial styloid process and the dorsal rim of the distal radius is kept in view to anchor orientation. Small anatomy, clear topography. Clinically, Lister’s tubercle is a hard landmark used for dorsal wrist examination and for image-guided injections around the second and third dorsal compartments. Repetitive friction or post-traumatic prominence at the tubercle can contribute to EPL tenosynovitis and, in distal radius fractures or after volar plate fixation, delayed EPL rupture often declares itself at this pulley point. Animated rotation makes the pulley concept obvious, showing why the EPL changes direction here while neighboring tendons remain in straighter grooves, a distinction that is hard to grasp in a single still. Use this asset in upper-limb anatomy teaching (osteology of the radius, extensor compartment mapping), in orthopedic or hand surgery education covering distal radius fractures and extensor tendon complications, and in radiology materials that correlate surface landmarks with ultrasound or CT of the dorsal wrist. It also suits patient-facing explanations of EPL irritation after trauma when a simple bony contour drives the story. Anatomical accuracy verified by SciePro's Medical Advisory Board.