the face Flashcards
what is the primary function of the muscles of the face?
protective function
what is the secondaryfunction of the muscles of the face?
modify facial expressions
what muscle has 2 different muscle bellies? what are they?
Occipitofrontalis
has a frontal and occipital belly
what muscle (be specific) allows for Eyebrow elevation and produced wrinkles on the forehead?
the frontal belly of Occipitofrontalis
what muscle surrounds the orbit and transverse eyelid?
Orbicularis oculi
what muscle be specific allow for Forceful closure of the eyelids?
orbital portion of the Orbicularis oculi
what muscle be specific allow for o Gentle closing of eye lids
palpebral portion of Orbicularis oculi
what is the muscle that encircles the eye?
Orbicularis oculi
what muscle acts as an oral sphincter, and o compresses and protrudes the lips?
Orbicularis oris
what muscle encircles the mouth?
Orbicularis oris
what muscle(s) resist distension when blowing?
Orbicularis oris and buccinator
is Orbicularis oris only one or 2 muscles?
separated into 2 muscles
what muscles produced a fake smile? how is it produced?
risorius
retraction of the corners of the mouth
how does depressor anguli oris function?
o Pulls the corners of the mouth inferiorly
where does depressor anguli oris originate and insert?
o Starts on the side of the mandible and inserts onto the corner of the mouth
what can be completed by contraction of depressor anguli oris?
o Leads to complete rounding of the mouth
what depressor muscle pulls lip inferiorly (exclusively)?
Depressor Labii Inferioris
which muscle sits slightly deeper to Depressor Anguli Oris?
Depressor Labii Inferioris
what happens when Depressor Labii Inferioris is contracted?
brings center of the lips down to the chin
what muscle sits dee to labii inferioris?
mentalis
what muscle is responsible for elevatation and protrusion the lip (pouting)
mentalis
what does the mental portion of the face refer to?
the chin
what muscle stretched between the zygomatic bone and the angle of the mouth?
Zygomaticus major
what muscles are involved in a true smile?
Zygomaticus major and Zygomaticus minor
what happens when Zygomaticus major is contracted?
Pulls the lips superiorly and laterally
what muscles is Stretched between the zygomatic bone and the upper lip?
Zygomaticus minor