Forearm, Posterior View

Description

Posterior anatomy of the antebrachium is emphasized bilaterally on a standing Black adult female figure, with blue highlighting spanning from just distal to the elbow to the dorsum of the wrist. Along the proximal forearm, the subcutaneous border of the ulna tracks inferiorly from the olecranon on the medial side, while the radius lies more lateral and rotates around the ulna toward the distal radioulnar joint. Superficially, the extensor compartment occupies most of the posterior forearm, including the brachioradialis and extensor carpi radialis longus and brevis laterally, and the extensor digitorum, extensor digiti minimi, and extensor carpi ulnaris coursing toward the dorsal wrist. Posterior forearm relationships matter when teaching dorsal tendon anatomy and when planning approaches to the radius and ulna. The extensor tendons pass beneath the extensor retinaculum at the wrist, where intersection syndrome and De Quervain tenosynovitis are differentiated by pain location and involved compartments, and the posterior interosseous nerve (deep branch of the radial nerve) can be injured during exposure of the proximal radius or with entrapment at the supinator (arcade of Frohse). Palpable landmarks, olecranon, ulnar shaft, and ulnar head, help orient splinting, casting, and incision placement. A clean surface reference. Suitable for gross anatomy and musculoskeletal modules that need a clear posterior surface rendering of the forearm and wrist, as well as for patient education materials on extensor tendon disorders, dorsal wrist pain, and posterior approaches in orthopedics and hand surgery. Anatomical accuracy verified by SciePro's Medical Advisory Board.