By, Sean Light CSCS
SLStrength.com
Continuing with the rotator cuff, today we look at the supraspinatus. Because it’s a member of the four muscle rotator cuff club, this means that it plays a big role in shoulder stability. It is the superior most muscle of the RC. It also contributes, along with the deltoid, in abducting the arm, which is just raising your arm out to the side. The first twenty degrees of abduction is when the suprasinatus is most involved.
Origin: Supraspinous Fossa of the Scapula which is just superior to the scapular spine.
Insertion: Greater Tubercle of Humerus
SOURCE: Hosford DPT, Darryl, “Shoulder Girdle Musculature,” http://www.PTCentral.com/muscles
