Surgical Neck Of The Humerus, Anterior View

Description

Surgical neck of the humerus is highlighted just inferior to the greater and lesser tubercles on the proximal arm bone, with the humeral head and anatomical neck positioned superiorly and medially. From an anterior perspective, the lesser tubercle sits more medially, while the greater tubercle projects laterally, framing the intertubercular sulcus (bicipital groove) that runs inferiorly between them. The proximal shaft continues distally from the constricted surgical neck, establishing the transition from the epiphysis to the diaphysis in a single, fixed frontal orientation. Fractures through the surgical neck are common after a fall onto the outstretched hand or a direct shoulder impact, and they carry specific neurovascular risk because the axillary nerve and posterior circumflex humeral artery course around the proximal humerus near this level, even though they lie posterior to the plane emphasized here. That clinical relationship explains the classic exam pairing of deltoid weakness with sensory change over the lateral shoulder (superior lateral cutaneous nerve of arm). The anterior lighting and uncluttered bony surface help you teach where surgical neck fractures occur relative to the tubercles and the bicipital groove, an anatomic landmark used to orient humeral head placement in arthroplasty and to discuss long head of biceps tendon pathology. Orthopedic and radiology educators can pair this illustration with AP shoulder radiographs to reinforce proximal humerus fracture classification and to clarify why displacement at the surgical neck changes varus or valgus alignment of the humeral head. It also fits operative anatomy sections in trauma manuals discussing deltopectoral exposure, tubercle orientation, and protection of the axillary nerve during fixation. Anatomical accuracy verified by SciePro's Medical Advisory Board.