coracoacromial arch

cor·a·co·a·cro·mi·al arch

a protective arch formed by the smooth inferior aspect of the acromion and the coracoid process of the scapula with the coracoacromial ligament spanning between them. This osseoligamentous structure overlies the head of the humerus, preventing its upward displacement from the glenoid fossa.
References in periodicals archive ?
If the coracoacromial arch is violated, these patients may also demonstrate superior escape of the humeral head.
In cases of coracoacromial arch incompetency, some patients may have evidence of anterior-superior humeral head escape where the contour of the bone is observed in the anterior aspect of the shoulder.
Extrinsic impingement refers to pathological changes in the coracoacromial arch, i.