What is the function of the supraspinatus?

In respect to this, what movement does the supraspinatus muscle do?

Action. Contraction of the supraspinatus muscle leads to abduction of the arm at the shoulder joint. It is the main agonist muscle for this movement during the first 15 degrees of its arc.

Furthermore, why is the supraspinatus most commonly injured? The supraspinatus tendon is the most frequently torn tendon in the shoulder. Tears to the rotator cuff can be caused by an acute injury such as a fall, lifting or pulling, or lifting too much overhead. Chronic tears are more common and are caused by degenerative changes over the years.

Considering this, what does the supraspinatus attach to?

The supraspinatus muscle has its origin from the supraspinous fossa of the scapula and inserts into the upper facet of the greater tuberosity of the humerus (Fig. 42-1). The muscle passes across the superior aspect of the shoulder joint with the inferior portion of the tendon intimately involved with the joint capsule.

How do you test for supraspinatus?

Test for Supraspinatus: The arm to be tested is moved into 90 degrees of abduction in the plane of the scapula (approximately 30 degrees of forward flexion), full internal rotation with the thumb pointing down as if emptying a beverage can.