facial musculature Flashcards
mm of mastication
temporalis, masseter (lateral mm)
med/lat pterygoid
inn of masticory mm
CN V3: only motor branch of CN 5
mm deep to the levator labia superioris
levator anguli oris
label all mm
see attached
corrugator cilli actions
draw eyebrows medially/inferirorly
nasalis actions
pulls/wrinkles skin on dorsum
depress ala and dialate nostrils
levator labii superioris alaque nasale action
depress ala laterally/ dialate nostrils
orbicularis oris actions
close lips
protrudes lips
resist distention while blowing
levator labii superioris actions
retract/elevate the upper lip
zygomaticus minor action
retract/elevate the upper lip
buccinator action
press cheek to molars, works to keep food on occlusal surfaces
zygo major action
elevate angle of the mouth, bilaterally=smile
levator anguli oris action
elevate and retract angle
part dialator of the mouth for smiling/grimicing
risorius action
part dilator of the mouth
retract/depresses angle of the mouth
depressor anguli oris action
retract/depresses angle of the mouth
depressor labii inferioris action
retracts and depresses the lower lip
mentalis action
elevates/protrudes the lower lip
platysma actions
depress mandible
tense skin
frontalis actions (both bellies)
frontal belly: elevate eyebrows, wrinkle forehead and retract scalp
occipital belly: retract scalp
orbicularis oculi action
close eyelids, palebral part does it gently and orbital part does it tightly
portions of orbicularis oculi
palebral and orbital
label mm and branches of nn
what nn inn muscles of facial expression
CN 7
