The Anterolateral Surface Of The Humerus

Description

Sweeping along the anterolateral shaft of the humerus, the animation orients the viewer from the proximal surgical neck down toward the distal third of the bone, keeping the anterior surface in continuous view while the lateral border stays clearly defined. As the humerus rotates, the deltoid tuberosity comes into relief on the lateral aspect, with the broad anterolateral surface expanding anterior to it and tapering as it approaches the supracondylar region. Proximally, the greater tubercle lies lateral to the intertubercular sulcus, and the shaft’s gentle torsion becomes apparent as the diaphysis transitions from a more anterior-facing surface to a slightly anteromedial presentation distally. Subtle contour changes are emphasized by the moving light, making ridges and muscular impressions easier to read than in a static plate. Attention to this specific surface matters because it is the workbench for common surgical and traumatic problems of the brachium. Plate fixation for humeral shaft fractures often uses an anterolateral corridor, where the surgeon must respect the radial nerve as it courses posteriorly in the radial groove and then emerges anteriorly near the lateral supracondylar ridge. Motion in the sequence clarifies where a plate can sit flush on the anterolateral cortex and why implant position, and drill trajectory, changes as the shaft twists along its long axis. This is where iatrogenic radial nerve palsy becomes a real risk. Use it in upper limb anatomy teaching to connect bony topography with deltoid insertion, humeral torsion, and the relationship between anterior and lateral landmarks during surface and palpation labs. It also reads well for orthopedic training modules, operative approach overviews, and textbook figures on humeral shaft fracture fixation where learners need spatial context from multiple angles. Anatomical accuracy verified by SciePro's Medical Advisory Board.