Teres major

Teres major is one of the seven scapulohumeral muscles that act around the glenohumeral joint to facilitate shoulder movement.

Summary

  • origin: caudal two thirds of lateral border and inferior angle of scapula
  • insertion: medial border of the intertubercular goove, which is the crest of lesser tubercle of humerus
  • innervation: lower subscapular nerve (C5/C6)
  • blood supply: thoracodorsal branch of the subscapular artery, posterior circumflex humeral artery
  • action: medial shoulder rotation and shoulder adduction

Gross anatomy

The muscle originates from the dorsal surface of the inferior angle of the scapula and inserts on the medial lip of the intertubercular sulcus of the humerus. It is related to the latissimus dorsi which wraps around the lower border of teres major. The tendon of the teres major lies posterior to the tendon of the latissimus dorsi and there is a bursa between them.

Upper limb anatomy
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Article information

rID: 23170
Section: Anatomy
Synonyms or Alternate Spellings:

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