The teres major muscle medially rotates, adducts, and extends the shoulder joint. Shortness of this muscle limits shoulder flexion and can impede depression and lateral rotation of the humeral head.
- Extends the shoulder (glenohumeral joint)
- Adducts the shoulder (g/h joint)
- Medially rotates the shoulder (g/h joint)
- Lateral side of the inferior angle and lower half of the lateral border of the scapula
- Crest of the lesser tubercle of the humerus
- Lower Scapular