Gross Anatomy of the Muscular System
A.) A muscle that is a prime mover/agonist for pivoting the head is the trapezius muscle. B.) One prime mover/agonist for extension of the head is the sternocleidomastoid muscle. C.) One muscle that is a prime mover/agonist for depression of the mandible is the suprahyoid muscle and one muscle that is the antagonist for depression of the mandible is the infrahyoid muscle. D.) One muscle that is a prime mover for smiling is the zygomaticus muscle. E.) One muscle that raises your eyebrow is the epicranius muscle (frontal belly).
A.) One muscle that is a prime mover/agonist for adducting the arms is the pectoralis major. B.) One shoulder muscle that abducts the arm is the deltoid. C.) The muscle that is the prime mover for shoulder flexion is the latissimus dorsi. D.) One antagonist for shoulder flexion is the deltoid.
E.) The muscles between the ribs are called intercostal muscles. Intercostal muscles help to form and move the chest wall, by expanding and shrinking the size of the chest cavity when you breathe.
A.) Three agonist muscles that flex the elbow are the biceps brachii, brachialis, and the brachioradialis. B.) One antagonist for elbow flexion is the pronator teres. C.) Two muscles that flex the wrist and allow a human to make a fist are the flexor carpi radialis and the flexor carpi ulnaris. D.) Two muscles that allow extension of the wrist and flaring of the fingers are the extensor digitorum and the extensor indicis. E.) One muscle that allows supination of the hand is the supinator muscle. Once muscle that allows pronation of the hand is the pronator quadratus.
A.) One muscle that performed extension of the hip is the iliopsoas. B.) The muscle that extends the knee and flexes the thigh is the rectus femoris. C.) One muscle that dorsiflexes the foot is the tibialis anterior. D.) The three muscles that extend the thigh...
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