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