teres major (muscle)
Definition: 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 majorTA
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