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