Origin
Inferior aspect of the scapula’s medial border
Insertion
Medial crest of the intertubercular groove
Actions
- Internal rotation of humerus
- Extension of the shoulder
- Adduction of the humerus
Innervation
- Lower subscapular nerve (C5, C6, C7)
Blood Supply
- Posterior circumflex humeral artery
- Thoracodorsal branch of the subscapular artery
Would you like to learn more about the teres major muscle? Then check out the teres major muscle article and video by clicking the link below: Teres Major Muscle Anatomy
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