teres major (muscle)


te·res ma·jor (mus·cle)

[TA] intrinsic (scapulohumeral) muscle of shoulder joint; origin, inferior angle and lower third of border of scapula; insertion, medial border of intertubercular groove of humerus; action, adducts and extends arm and rotates it medially; nerve supply, lower subscapular from posterior cord of brachial plexus (fifth and sixth cervical spinal nerves). Synonym(s): musculus teres major [TA]