The Surgical Neck Of The Humerus In A Posterior View

Description

Posteriorly, the proximal humerus fills the frame from the humeral head and anatomic neck superiorly to the proximal shaft inferiorly, with the surgical neck highlighted as the circumferential constriction just distal to the tubercles. As the animation advances, the viewer is oriented to the posterior aspect of the greater tubercle laterally and the articular segment medially, clarifying how the metaphyseal region narrows into the diaphysis. Subtle rotation cues reinforce laterality and proximal to distal relationships without shifting away from a posterior viewpoint. Clinically, the surgical neck is the common fracture site after a fall onto an outstretched hand in older adults and after direct trauma in younger patients, and displacement patterns at this level drive management in proximal humerus fractures. Proximity to the quadrangular space makes the relationship to the axillary nerve and posterior circumflex humeral artery a key teaching point, since both can be injured with fracture or iatrogenically during reduction and fixation. A timed sequence reads better than a single frame here, because it can step the eye from head and tubercles down to the narrowing at the surgical neck, then into the proximal shaft where angulation and translation are judged. Use this animation in upper limb gross anatomy labs, orthopedic teaching decks on Neer fracture parts, or radiology primers that correlate posterior bony landmarks with scapular Y and axillary lateral shoulder views for fracture assessment. It also supports patient-facing counseling materials that explain why neurologic examination of deltoid function and lateral shoulder sensation matters after proximal humeral injury. Anatomical accuracy verified by SciePro's Medical Advisory Board.