Origin: Lower lateral border and inferior angle of the scapula
Insertion: Medial lip of the intertubercular (biciptial) groove of the anterior humerus
Action: Adducts the arm, medially rotates the arm and extends the arm at the shoulder
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| Teres Major |
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| Lower Lateral Border and Inferior Angle |
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| Medial Lip of Intertubercular groove of humerous |
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