Teres major is only functional when the Rhomboids fix the scapula. This muscle mainly helps the Latissimus dorsi.
- Origin: Lower 1/3 of the lateral border of the scapula.
- Insertion: Intertubercular goove (between the greater and lesser tubercles) of the humerus.
- Actions: Shoulder adduction.
Internal rotation.
Shoulder extension. - Innervation: Lower subscapular nerve.
- Daily uses: Tuck the back of your shirt into your trousers.
- Example strengthening exercises – Shoulder internal rotation.
- Example stretches – External rotation stretch.