origin of supraspinatus
supraspinous fossa of scapula
The supraspinatus is a muscle located in the upper back region of the human body. It is one of the four muscles that make up the rotator cuff, which is a group of muscles and tendons that surround the shoulder joint.
The origin of the supraspinatus muscle is on the supraspinous fossa of the scapula, which is a shallow depression located on the posterior (back) side of the scapula bone. Specifically, the supraspinatus tendon attaches to the superior facet of the greater tubercle of the humerus, which is the bone of the upper arm that forms the ball joint of the shoulder.
When the supraspinatus muscle contracts, it pulls the humerus upward and helps to stabilize the shoulder joint. It also assists with the initial stage of lifting the arm away from the body. The supraspinatus muscle is important for many functional activities, such as lifting weights, throwing a ball, and reaching for objects above shoulder height.
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