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