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