1. Facial Flashcards
Occipitalis
Location
Action
The occipital belly of epicranius muscle (also known as the occipitalis muscle) helps extend the scalp so that the eyebrows can come up and the forehead may wrinkle. This, along with the frontalis muscle is one of two parts, or bellies, of the epicranius.
Frontalis
Location
Action
helps extend the scalp so that the eyebrows can come up and the forehead may wrinkle. This, along with the frontalis muscle is one of two parts, or bellies, of the epicranius.
Corrugator
Location
Action
L- medial part of supraorbital margin
A- pulls eyebrows together
Zygomaticus
Location
Action
L- lateral surface of the zygomatic bone
A- elevates mouth and draws angle of the mouth laterally
Orbicularis oculi
Location
Action
L- thin, flat sphincter muscle of eyelid; surrounds rim of the orbit
A- closes eye; produces blinking, squinting, and draws eyebrows inferiorly
Orbicularis oris
Location
Action
L- multilayered muscle of the lips w/fibers that run in many different directions; most run circularly
A- closes lips; purses and protrudes lips; kissing and whistling muscle
Buccinator
Location
Action
thin, horizontal cheek muscle, principal muscle - molar region of maxilla and mandible
deep to masseter
A- compresses the cheek; whistling/sucking; helps keep food in during chewing
Facial nerve (Cranial VII)
Depressor labii inferioris
Location
Action
L - small muscle running from mandible to lower lip
A- depresses lower lip (as in a pout)
Levator palpebrae superioris
Location
Action
L- lesser wing of sphenoid bone, above optic canal
A-raises and retracts superior eyelid
Mentalis
Location
Action
L- one of the muscle pair forming a v-shaped muscle on chin
A- wrinkles chin; protrudes lower lip
Risorius
Location
Action
L- slender muscle inferior and lateral to zygomaticus
A- Draws corner of lip laterally, tenses lip, synergist to zygomaticus
Levator labii superoris
Location
Action
L -the muscle b/w orbicularis oris and inferior eye margin
A- opens lips; elevates and furrows the upper lip
Platysma
Location
Action
L- unpaired, thin, sheetlike superficial neck muscle; not a head muscle, but plays a role in facial expression
A- tenses skin of neck (during shaving), helps depress mandible; pulls lower lip back and down
