Muscles of facial expression Flashcards
muscles of the orbital group (2)
orbicularis oculi
corrugator supercilii
muscles of the nasal group (3)
nasalis
procerus
depressor septi
examples of muscles of oral group (6)
depressor anguli oris zygomatic major levator labii superioris levator labii superioris alaeque nasi orbicularis oris buccinator
other muscles shown on prosection
occipitofrontalis
platysma
neck mucles shown
posterior belly of digastric
stylohyoid
role of transverse nasalis
compresses nasal aperture
role of alar nasalis
draws cartilage downwards and laterally
opening nostrils
role of procerus
draws down medial eyebrows
producing transverse wrinkles over nose bridge
role of depressor septi
pulls nose inferiorly
role of depressor anguli oris
draws down and lateral corners of mouth
role of depressor labii inferioris
draws lower lip downwards and lateral
role of mentalis
raises and protrudes the lips
role of risorius
retracts corner of mouth
role of zygomatic major
draws corner of mouth up and lateral
role of zygomatic minor
draws upper lip upwards
role of levator labii superioris
raises upper lip and helps form nasolabial furrow
role of levator labii superioris alaeque nasi
raises upper lip and open nostrils
role of levator anguli oris
raises corner of mouth
role of orbicularis oris
closes lips; protrudes lips
role of buccinator
presses the cheek against teeth
role of palprebral orbicularis oculi
gentle eyelid closure
role of orbital orbicularis oculi
forceful eyelid closure
branches of the facial nerve
temporal zygomatic buccal marginal mandibular cervical
temporal branch innervates
frontalis
orbicularis oculi
corrugator supercilii
zygomatic branches innervate
orbicularis oculi
buccal branches innervate
orbicularis oris
buccinator
zygomatics
marginal mandibular branches innervate
mentalis
cervical branch innervates
platysma
where does the facial nerve exit the skull
stylomastoid foramen