The serratus anterior muscle inserts exactly at the front border of the scapula, or shoulder blade. The muscle has three sections: the superior, intermediate or medial, and the inferior.

Anterior, posterior, and multidirectional shoulder instability have long been recognized, but superior instability from superior labral detachment has been described only recently. Identification ...

Shoulder arthroscopy portal placement in lateral position with shoulder abducted 45 ∞. A-anterior, P-posterior, AL-anterolateral. Adapted with permission from Ciullo JV: Shoulder Injuries in ...