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