Relier Pairs Muscle Actions Part One (D)Version en ligne muscles par Jennifer Jennings 1 sternocleidomastoid 2 levator scapulae 3 latissimus dorsi 4 trapezius 5 biceps brachii 6 triceps brachii 7 rectus abdominis 8 flexor carpi radialis and ulnaris 9 pectoralis major 10 deltoid elbow flexion, forearm supination. adducts and medially rotates humerus, extends the shoulder joint flexes wrist anteriorly rotates head left and right. bilaterally draws head forward and down. elevates scapula if cervical vertebrae are fixed., flexes neck laterally when scapula is fixed. extends elbow flexes waist and compresses abdominal viscera flexes, adducts, and medially rotates humerus extends and laterally flexes the neck. ant. fibers flex and medially rotate arm, lat. fibers abduct the arm, post. fibers extend and laterally rotate the arm
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