Scapular Acromion, Posterior View

Description

Acromion process dominates this posterior shoulder-girdle view as a broad, flattened lateral continuation of the scapular spine. From the medial border, the spine runs obliquely superolaterally to the acromial angle, then expands into the acromion overhanging the superior aspect of the glenoid region, with the supraspinous fossa superior to the spine and the infraspinous fossa inferior. The lateral margin and neck of the scapula sit distal to the spine, orienting the acromion as the posterior roof of the subacromial space. Orientation is unambiguous. Posterior anatomy of the acromion matters when teaching the osseous landmarks that guide shoulder examination and surgery, because subtle differences in acromial contour and the acromial angle influence the supraspinatus outlet and are discussed in subacromial impingement and rotator cuff disease. The illustration’s fixed posterior perspective makes the scapular spine to acromion transition easy to trace, which helps when correlating surface palpation with deep structures such as the subacromial bursa and supraspinatus tendon that lie anterior and inferior to the acromion. It also supports discussion of attachment sites, including the posterior deltoid origin along the acromion and the trapezius insertion along the superior acromial edge, both relevant in rehabilitation planning after acromial or scapular spine fractures. Use this illustration in gross anatomy labs, kinesiology and shoulder biomechanics lectures, and orthopedic or sports-medicine teaching files covering acromioplasty, rotator cuff repair portals, and acromioclavicular joint trauma where posterior bony landmarks orient the clinician. Anatomical accuracy verified by SciePro's Medical Advisory Board.