BackMuscle Actions in Anatomy & Physiology
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Terms in this set (30)
Raises eyebrows, fixes aponeurosis, and pulls scalp posteriorly.
Closes eye, produces blinking, squinting, and draws eyebrows inferiorly.
Raises lateral corners of mouth upward (smiling muscle).
Closes lips, purses and protrudes lips (kissing and whistling muscle).
Draws corner of mouth laterally, compresses cheeks (as in whistling), holds food between teeth during chewing.
Tenses skin of neck, depresses mandible, pulls lower lip back and down.
Prime mover of jaw closure; elevates mandible.
Closes jaw; elevates and retracts mandible.
Both cause flexion of neck; individually rotate head toward shoulder on opposite side.
Extend and bend the vertebral column laterally.
Prime mover of arm flexion; adducts and medially rotates arm.
Prime mover to protract and hold scapula against chest wall; rotates scapula.
With ribs fixed, draws scapula forward and inferiorly; aids in inspiration.
Pull ribs toward one another to elevate rib cage; aid in inspiration.
Draw ribs together to depress rib cage; aid forced expiration.
Flexes and rotates vertebral column; increases abdominal pressure; used in sit ups and curls.
Flexes and rotates vertebral column; compresses abdominal wall; aids back muscles in trunk rotation and lateral flexion.
Flexes and rotates vertebral column; compresses abdominal wall; aids back muscles in trunk rotation and lateral flexion.
Compresses abdominal contents.
Extends head; raises, rotates, and retracts (adducts) scapula and stabilizes it.
Prime mover of arm extension; adducts and medially rotates arm; brings arm down in power stroke.
Lateral rotation of arm; stabilizes shoulder.
Extends, medially rotates, and adducts arm.
Elevates and adducts scapula.
Pulls scapula medially (retraction); stabilizes scapula.
Prime mover of arm abduction.
Powerful forearm extensor; antagonist of forearm flexors.
Powerful flexion and supination of forearm.
Synergist in forearm flexion.
Flexor of forearm.