Posterior Depiction of the Adult Male Wrist

Description

Posterior soft tissues of the adult male wrist are presented with the distal radius and ulna forming the proximal carpal articulation, and the carpus arranged deep to the extensor retinaculum. Across the dorsal surface, extensor tendons course distally in parallel bands toward the metacarpals and digits, with extensor carpi radialis longus and brevis positioned more laterally (radially) than extensor carpi ulnaris at the ulnar margin. The extensor pollicis longus tendon angles obliquely toward the thumb on the radial side, separating compartments as it crosses toward the first metacarpal. Tendon sheaths and compartmental boundaries guide the eye. Dorsal wrist anatomy matters because extensor tendons are constrained in six osteofibrous compartments under the extensor retinaculum, a layout that explains common patterns of tenosynovitis and helps you localize pain and crepitus on examination. Radial-sided symptoms often track to the first dorsal compartment (abductor pollicis longus and extensor pollicis brevis) in de Quervain tenosynovitis, while a dorsal ganglion typically arises near the scapholunate interval and can distort the extensor tendon contours. Surgeons also use these dorsal landmarks when planning arthroscopic portals (3-4, 4-5, 6R, 6U) and when protecting the dorsal sensory branches during exposure. Faculty can drop this plate directly into upper-limb gross anatomy teaching to reinforce extensor compartment organization, tendon trajectory, and the surface anatomy used in OSCE-style wrist exams. Editorial teams will find it well suited to hand surgery, sports medicine, and radiology texts discussing dorsal wrist pain, ganglion cysts, and compartment-specific injections. Anatomical accuracy verified by SciePro's Medical Advisory Board.