Deltoid Tubercle Of The Scapula

Description

Scapular spine and its deltoid tubercle dominate this posterior shoulder blade view, with the thickened tubercle positioned along the crest of the spine as it runs laterally toward the acromion. Medial to lateral, the spine divides the posterior surface into the supraspinous fossa superiorly and the larger infraspinous fossa inferiorly, while the medial (vertebral) border and inferior angle frame the scapular body. The acromion caps the lateral end of the spine, and the lateral border trends toward the glenoid region, which remains secondary from this rear perspective. Bone surface relief is emphasized. Deltoid origin from the inferior lip and crest of the scapular spine concentrates mechanical load at the deltoid tubercle, and this relationship matters when teaching shoulder abduction mechanics alongside trapezius insertion on the superior lip of the spine. Posterior scapular spine stress fractures are described after reverse total shoulder arthroplasty and in overhead athletes, and this illustration helps localize why focal tenderness can cluster along the spine near the acromial base. The fixed posterior vantage also clarifies how the spine functions as a palpable landmark when tracing from the medial border toward the acromion during surface anatomy exams or when orienting a posterior approach to the shoulder girdle. Use this illustration in gross anatomy and kinesiology courses to anchor muscle attachment maps for deltoid, trapezius, supraspinatus, and infraspinatus, and in orthopedic teaching materials discussing acromial and scapular spine fractures, postoperative complications, or posterior shoulder approaches. It also suits radiology correlation pages that translate the palpable scapular spine into expected contours on scapular Y and axillary projections. Anatomical accuracy verified by SciePro's Medical Advisory Board.