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14 Cards in this Set
- Front
- Back
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Epicranius (occipitofrontalis) |
Bipartite muscle consisting of frontal and occipital bellies connected by epicranial aponeurosis |
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Frontal belly |
Covers forehead, no bony attachments Raises eyebrows and wrinkles forehead |
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Occipital belly |
Overlies posterior occiput Fixes aponeurosis and pulls scalp posteriorly |
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Corrugator supercilii |
Small muscle, orbicularis oculi Frowning, draws eyebrows medially and inferiorly |
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Orbicularis oculi |
Thin, flat sphincter muscle of eyelid, surrounds rim of orbit Closes eye, produces blinking and squinting, draws eyebrows inferiorly |
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Zygomaticus |
Muscle pair extending diagonally from cheekbone to corner of mouth Raises lateral corners of mouth (smiling) |
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Risorius |
Slender muscle inferior and lateral to zygomaticus Draws corner of lip laterally, tenses lip, synergist of zygomaticus |
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Levator labii superioris |
Thin muscle between orbicularis oris and inferior eye margin Opens lip, raises and furrows upper lip |
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Depressor labii inferioris |
Small muscle running from mandible to lower lip Draws lower lip inferiorly (pout) |
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Depressor anguli oris |
Small muscle lateral to depressor labii inferioris Draws corners of mouth down and laterally, zygomaticus antagonist |
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Orbicularis oris |
Complicated, multilayered muscle of lips with fiber that run in many diff directions, most run circularly Closes lips, purses and protrudes lips (kissing whistling) |
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Mentalis |
One of the muscle pair forming a v-shaped muscle mass on chin Wrinkles chin, protrudes lower lip |
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Buccinator |
Thin, horizontal cheek muscle, deep to masseter Compresses cheek, holds food during chewing, draws corner of mouth laterally |
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Platysma |
Unpaired, thin, sheetlike superficial neck muscle, plays role in facial expression Tenses skin of neck, depress mandible, pulls lower lip back and down, proulducing downward sag of mouth |
