Posterior Anatomy of the Male Forearm

Description

Posterior antebrachial anatomy is presented with the ulna’s subcutaneous posterior border running longitudinally, creating a palpable ridge from the olecranon toward the ulnar head, while the radius lies more lateral and deeper under the extensor mass. Laterally, the brachioradialis forms the lateral margin of the forearm as the extensor carpi radialis longus and brevis tendons track distally toward the bases of the second and third metacarpals. Medially, the extensor carpi ulnaris courses toward the fifth metacarpal, and centrally the extensor digitorum tendons align toward the dorsal digits beneath the extensor retinaculum at the level of the wrist. This posterior view is the one you want when teaching surface anatomy and tendon topography, because the extensor compartments are easiest to map to bony landmarks from behind: Lister’s tubercle on the distal radius separates extensor pollicis longus from extensor carpi radialis tendons, and the ulnar head helps locate extensor carpi ulnaris. Pain and crepitus over the radial styloid with thumb motion points to de Quervain tenosynovitis (first dorsal compartment), while dorsal wrist pain after distal radius fracture often centers on extensor pollicis longus attrition in the third compartment. Clear landmarks. Predictable tendon paths. Use this illustration for gross anatomy lab manuals, orthopaedic or hand surgery teaching files, and radiology correlation pages when orienting learners to axial MRI or ultrasound of the dorsal wrist extensor compartments. It also fits patient education and clinic handouts for lateral elbow tendinopathy and dorsal compartment tenosynovitis where tendon naming and location matter. Anatomical accuracy verified by SciePro's Medical Advisory Board.