Muscles of facial expression Flashcards
elevates eyebrows and wrinkles skin of forehead; protracts scalp (indicates surprise or curiosity)
front belly of occipitofrontalis
front belly of occipitofrontalis innervation
temporal
retracts scalp; increasing effectiveness of front belly
occipital belly of occipitofrontalis
occipital belly of occipitofrontalis innervation
posterior auricular branch
closes eyelids by narrowing the palpebral fissure
orbicularis oculi
orbicularis oculi innervation
temporal and zygomatic
draws eyebrow medially and inferiorly; creating vertical wrinkles above nose (concern or worry)
corrugator supercilli
corrugator supercilli innervation
temporal
depresses medial end of eyebrow; wrinkles skin over dorsum of nose (conveying disdain or dislike)
procerus plus transverse part of nasalis
procerus and transverse part of nasalis innervation
buccal
depresses ala laterally, dilating anterior nasal aperture (flaring nostrils), helps elevate upper lip
alar part of nasalis plus levator labi superioris alaeque nasi
alar part of nasalis plus levator labi superioris alaeque nasi innervation
buccal
closes oral fissure; phasic contraction compresses and protrudes lips (kissing) or resists distension (when blowing)
orbicularis oris
orbicularis oris innervation
buccal
part of dilators of mouth; retract (elevate) and/or evert upper lip; deepen nasolabial sulcus (showing sadness)
levator labii superior and zygomaticus minor
levator labii superior innervation
buccal