Teres Major

Teres Major

Teres Major

Muscle Origin

The inferior angle of the scapula to lesser tubercle of humerus.

Posterior aspect of the inferior angle of the scapula.

Insertion

Medial lip of the intertubercular sulcus of the humerus.

The teres major attaches to the medial lip of the intertubercular sulcus, which is a groove separating the greater and lesser tubercles of the humerus.

Action

Extends arm at shoulder.

Adduct the humerus, internal rotation (medial rotation) of the humerus, extend the humerus from flexed position, protracts scapula, and depresses the shoulder.

Innervation – Nerve control

Lower subscapular nerve.

The lower subscapular nerve (alternatively, inferior subscapular nerve) is a nerve that supplies the lower part of the subscapularis muscle, and also supplies the teres major muscle. Wiki

Artery

Subscapular and circumflex scapular arteries.

The teres major uses the subscapular artery which originates from the medial surface of the third-part of the axillary artery.

Antagonist muscles

The Teres Major’s antagonist muscles are the Infraspinatus, Teres Minor, and the Deltoid (posterior fibers).

Pictures of muscles

 

Trigger Point Referrals

 

Stretching description

 

Exercises

 

Injuries

 

Treatment

 

Additional Resources
Sports Lab
Wiki
American Academy of Manual Medicine

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