Shoulder Internal Rotator

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  • Latissimus Dorsi
    • Extends, adducts and medially rotates humerus; raises body toward arms during climbing.
  • Pectoralis Major Sternal
    • Adducts and medially rotates humerus;
    • draws scapula anteriorly and inferiorly
    • Acting alone: sternocostal head extends humerus
  • Subscapularis
    • Medially rotates arm and adducts it.
    • helps to hold humeral head in glenoid cavity of scapula.
Anterior DeltoidsLatissimus DorsiPectoralis Major SternalSubscapularisTeres Major
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