Coracoacromialt

Coracoacromialt appears to be a misspelling or variant of coracoacromial, most commonly referring to the coracoacromial ligament. The coracoacromial ligament is a strong triangular band of dense connective tissue located in the shoulder girdle.

Anatomy and attachments: The ligament extends from the anterior tip of the coracoid process to the acromion, forming part of the coracoacromial arch along with the acromion and coracoid. It lies superior to the supraspinatus tendon and the subacromial bursa, contributing to the roof of the subacromial space.

Function: It helps provide superior stability to the glenohumeral joint by limiting upward displacement of the humeral head. The coracoacromial arch serves as a protective roof over the joint, influencing the mechanics of shoulder movement and acting as a barrier to superior migration when rotator cuff function is compromised.

Clinical significance: The space under the coracoacromial arch is relevant in subacromial impingement syndrome, where reduced subacromial space can compress rotator cuff tendons and the long head of the biceps. Variations in the ligament’s thickness or the presence of osteophytes can contribute to impingement. In some cases of shoulder impingement, surgical strategies may involve addressing the coracoacromial arch, though ligament preservation is common to maintain stability.

Variations: The ligament is typically present in most individuals, but anatomical differences in thickness, length, and curvature can occur, potentially influencing subacromial space dynamics.

See also: coracoacromial arch, coracoid process, acromion, shoulder impingement.