Skeletal Structure Of Acromion Of The Scapula

Description

Acromion (acromial process) caps the superolateral scapula as a broad, flattened bony shelf continuous medially with the spine of the scapula and projecting anteriorly over the glenoid region. From a dorsal shoulder blade orientation, the scapular spine runs laterally to expand into the acromial plate, while the superior surface remains subcutaneous and the inferior surface forms the roof of the subacromial space. Anteromedially, the acromial facet for the clavicle defines the acromioclavicular joint, positioned superior to the coracoid process and anterior to the spinoglenoid region. Bony contours dominate the frame. Acromial morphology drives common pain patterns in the shoulder. A hooked or downsloping acromion, inferior osteophytes at the acromioclavicular joint, or an unfused os acromiale can narrow the subacromial interval, predisposing to supraspinatus tendinopathy and subacromial bursitis, and the relationship of the acromion to the clavicle is central when explaining AC joint sprain after a fall on the lateral shoulder. Landmark anatomy matters. The acromion also anchors the deltoid and trapezius attachments, so fractures or postoperative changes can alter scapulothoracic mechanics even when the glenohumeral joint remains intact. Use this illustration in gross anatomy and kinesiology teaching to orient learners to the scapular spine to acromion continuum, and in orthopedic or sports medicine publications discussing impingement, AC joint arthrosis, distal clavicle excision, or acromioplasty planning. It also fits clinical handouts where you need a precise bony reference for palpation of the acromion and localization of AC joint tenderness. Anatomical accuracy verified by SciePro's Medical Advisory Board.