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Upper Arm Muscles

Upper Arm Muscles. By: Laura Keren PED 216. Pectoralis Major. Origin: Sternum, shoulder girdle, and first six ribs. Insertion: Proximal end of humerus. Adducts and flexes the arm. Latissimus dorsi. Insertion: Proximal end of humerus. Origin: Lower spine and ilium.

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Upper Arm Muscles

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  1. Upper Arm Muscles By: Laura Keren PED 216

  2. Pectoralis Major Origin: Sternum, shoulder girdle, and first six ribs Insertion: Proximal end of humerus Adducts and flexes the arm

  3. Latissimus dorsi Insertion: Proximal end of humerus Origin: Lower spine and ilium Extends and adducts humerus

  4. Deltoid Origin: shoulder girdle, spine of scapula, clavicle Insertion: proximal humerus Adducts the arm

  5. Supraspinatus Origin: Supraspinous fossa of scapula Insertion: greater tubercle of humerus Abduction of humerus; stabilizes shoulder joint

  6. Infraspinatus Origin: Infraspinous fossa of scapula Insertion: greater tubercle of humerus Lateral rotation of humerus; horizontal abduction of humerus

  7. Subscapularis Insertion: Lesser tubercle of humerus Origin: Subscapular fossa of scapula Adduction of arm; medial rotation of humerus

  8. Teres Major Insertion: Medial lip of bicipital groove of humerus Origin: Inferior angle of scapula Extension; adduction; medial rotation of humerus

  9. Teres Minor Insertion: greater tubercle of humerus Origin: Upper 2/3 of axillary border of scapula Extension; lateral rotation humerus

  10. Coracobrachialis Origin: Coracoid process Insertion: upper ½ of the medial border of humerus Flex and weakly adducts arm

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