Medial Border Of The Humerus In Anterior View

Description

Humerus medial border (margo medialis) runs as a straight, palpable ridge along the anteromedial aspect of the humeral shaft, extending from just distal to the surgical neck toward the medial supracondylar ridge in the distal third. From this anterior viewpoint, the border reads as a vertical line that narrows as it approaches the elbow, sitting medial to the bicipital groove region and lateral to the soft tissue corridor that would overlie the brachial artery and median nerve. Proximally, the contour relates to the lesser tubercle and the medial lip of the intertubercular sulcus; distally it blends into the medial supracondylar area above the medial epicondyle. A sharp landmark. Orientation to the medial border matters when teaching humeral shaft topography and when planning fixation, because plate positioning and screw trajectory must respect the medial soft tissues and the nearby neurovascular bundle. Coracobrachialis inserts along the medial midshaft, and the medial intermuscular septum anchors along this border to separate anterior and posterior compartments, a relationship that helps explain why swelling or hematoma after a midshaft fracture can track in predictable planes. The fixed anterior perspective supports side-to-side comparison with lateral and posterior humeral landmarks, reducing confusion between the medial border and the more anterior crest associated with the intertubercular sulcus. Use this illustration in upper limb osteology labs, anatomy practical exams, and orthopedic teaching files that discuss humeral shaft fractures, plating approaches, and surface anatomy for brachial artery palpation in the medial arm. It also fits well in medical publisher atlases that label bony borders and ridges using Terminologia Anatomica. Anatomical accuracy verified by SciePro's Medical Advisory Board.