Actions Flashcards
frontalis belly, epicranius
pulls scalp forward; wrinkles forehead & raises eyebrows
occipitalis belly, epicranius
pulls scalp backwards
procerus
depresses eyebrows medially
compressor nares
compresses cartilage at bridge of nose
depressor septi
widens nostrils
corrugator supercilli
draws eyebrows medial & down (forms vertical furrow between eyebrows)
levator labii superioris
raises & everts upper lip
levator labii superioris alequae nasi
raises & everts upper lip; dilates nostril
zygomaticus minor
raises upper lip; produces nasolabial grove
zygomaticus major
draws angle of mouth up and out
levator anguli oris
raises angle of mouth; produces nasolabial groove
orbicularis oris
close mouth; purse & protrude lips
buccinator
compress cheeks against teeth
risorius
draws back angle of mouth
mentalis
raises & protrudes lower lip
depressor labii inferioris
draws lower lip down
depressor anguli oris
draws corner of mouth down & out
levator palpebrae superioris
elevates upper eyelid
superior rectus
elevate & adduct the cornea; intorsion
inferior rectus
depress & adduct the cornea; extorsion
medial rectus
adducts cornea
lateral rectus
abducts cornea
superior oblique
elevate & adduct the cornea; intorsion
inferior oblique
depress & adduct the cornea; extorsion
temporalis
elevate & retract mandible
masseter
elevate & protract mandible
medial pterygoid
elevate & protract mandible; assists in gliding or rotatory movement
lateral pterygoid
protracts mandible; pulls disc forward; depress chin& assist in gliding or rotatory movement
dilatator nares
widens, dilates nostrils & anterior nasal aperture