AP BIOLOGY

Detailed explanation-1: -(Middle) The infraspinatus and teres minor muscles are located below the scapular spine. The infraspinatus muscle is the larger and is located more superiorly than teres minor. (Bottom) The supraspinatus, subscapularis, teres minor, and infraspinatus (clockwise) continue to course laterally.

Detailed explanation-2: -The infraspinatus is most closely associated with the subscapularis, supraspinatus, and teres minor, as they all combine around the shoulder to encircle the glenohumeral joint. These muscles act to stabilize and move the glenohumeral joint.

Detailed explanation-3: -A thick, triangular muscle; one of the 4 muscles which comprise the Rotator Cuff of the shoulder.

Detailed explanation-4: -What Is the Infraspinatus Muscle? Your infraspinatus muscle is a thick triangular muscle located at the back of your shoulder. It’s attached to the top of your upper arm bone (humerus) and your shoulder blade (scapula). The other rotator cuff muscles are the supraspinatus, subscapularis, and the teres minor.

Detailed explanation-5: -Infraspinatus muscle originates and sits in the infraspinous fossa of the scapula. The tendon of the infraspinatus passes posteriorly on to the glenohumeral join and inserts on to the middle facet of the greater tuberosity of the humerus and capsule of the shoulder joint.