Imaging of the Glenoid Labrum: Location Matters! By Michelle Nguyen, MD

Glenoid labrum - Shoulder Anatomy

Did you get this muscle anatomy quiz right?? Hint: it initiates shoulder abduction before any other muscle does. The supraspinatus is one of the four rotator cuff muscles, and it’s actually the most commonly torn one—especially in adults over 70, where it’s considered a normal sign of aging! This small but mighty muscle plays a key role in stabilizing the humeral head within the glenoid and kicks off the first 15 degrees of shoulder abduction before the deltoid takes over. It’s innervated by the