Teres major | ARM MOVERS | Rotator Cuff

            The teres major is a thick, rounded muscle of the shoulder joint. It is a thick but somewhat flattened muscle.
Supraspinatus, Infraspinatus, Subscapularis, and Teres Minor together This Four Muscle work as rotatory to the Humerus. So, also known as Rotator Cuff.

teres major ORIGIN:

teres major Originates from the posterior surface of the scapula at the inferior angle.

teres major INSERTION:

teres major inserted at the intertubercular groove of the humerus, tendon fused with the tendon of latissimus dorsi.

teres major ACTION:

  1. teres major posteromedially extends, medially rotates, & adducts arm.
  2. teres major synergist of latissimus dorsi.

teres major NERVE SUPPLY:

The lower scapular nerve.

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