Facial and Neck Muscles Flashcards
Occipitalis
overlies occipital and part of the temporal bone. Fixes aperneurosis and pulls scalp posteriorly
Frontalis
covers forehead and dome of skull. elevates the eyebrows -wrinkles forehead skin horizontally
Orbicularis Oculi
Sphincter muscle of eyelid. surround rim of orbit.Closes the eye, produces blinking and squinting
Zygomaticus
muscle pair extending diagonally from cheekbone to corner of mouth. Smiling muscle, raises lateral corners of the mouth
Orbicularis Oris
multilayered muscle, most run circularly around the mouth. Closes the lips, purses, kissing, and whistling
Mentalis
V shaped muscle pair on chin. Wrinkle chin
Platysma
unpaired thin sheet like muscle over the neck. tenses skin of neck, used in shaving
Levator labii superioris
muscle b/n orbicularis oris and inferior eye margin. Opens lips, elevates upper lip
Depressor Labii inferioris
small muscle running from mandible to lower lip. depresses lower lip
Buccinator
principle muscle of the cheek and deep to masseter. compresses cheek for sucking and whistling
Masseter
Powerful muscle that covers lateral aspect of ramus of mandible. closes jaw, elevates mandible $
Temporalis
fan shaped covers part of the temporal, frontal and parietal bones. Closes jaw, elevates and retracts mandible $
Medial and lateral pterygoid
deep two headed muscle that runs along internal surface of mandible and is largely concealed by the pterygoid bone. protract mandible and grinding movements
Genioglossus
fan shaped muscle bulk of inferior part of tongue. protracts tongue
Digastric
consists of two bellies united by an intermediate tendon, forming a V shape under the chin, one origin on chin one origin on mastoid insertion on the hyoid bone where it meets. Open mouth and depress mandible.