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