Anterolateral Surface Of The Humerus

Description

Humeral shaft anatomy dominates this illustration, centering on the anterolateral surface of the brachium with the lateral border and adjacent anterior cortex in full relief. Proximally, the shaft broadens toward the surgical neck region, while the lateral contour leads the eye distally toward the lateral supracondylar ridge and the lateral epicondylar area of the distal humerus. Midshaft landmarks logically include the deltoid tuberosity on the lateral aspect, with the smoother anterior surface medial to it forming the typical origin area for brachialis. Bone texture reads as cortical, with a continuous longitudinal axis that supports orientation in standard anatomical position. This region matters because it is where form and function meet at common attachment sites and fracture patterns: the deltoid inserts on the deltoid tuberosity, and brachialis takes origin from the distal half of the anterior humerus, so malreduction after a midshaft fracture can alter shoulder contour and elbow flexion mechanics. Clinically, plates placed along the anterolateral humerus rely on these palpable contours, and the fixed anterolateral perspective supports teaching of safe corridors that respect nearby neurovascular structures, including the radial nerve as it transitions from posterior to anterior compartments near the distal third. A reliable surface landmark. It also helps when correlating surface anatomy with pain generators in overuse syndromes involving brachialis or deltoid insertional enthesopathy. Use this illustration in gross anatomy lab manuals, orthopedic lecture slides on humeral shaft fracture classification, and surgical education materials describing anterolateral approaches for open reduction and internal fixation. It also fits radiology and sports medicine resources that need a bony reference for muscle attachment mapping on the arm. Anatomical accuracy verified by SciePro's Medical Advisory Board.