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The teres minor is one of the four Rotator Cuff muscles. The four Rotator Cuff muscles are:
- The teres minor attaches from the superior aspect of the lateral border of the scapula to the greater tubercle of the humerus.
- Laterally rotates the arm at the glenohumeral joint
- Adducts the arm at the glenohumeral joint
- Horizontally extends the arm at the glenohumeral joint
- The Teres minor is the “T” of SITS (Supraspinatus, Infraspinatus, Teres minor, Subscapularis), an acronym for the rotator cuff group.
- Teres minor and the adjacent teres major have antagonistic joint actions because they wrap around the humerus in opposite directions. The teres minor is a lateral rotator; the teres major is a medial rotator.