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