Lab Practical 2 Actions Flashcards
Occipitalis Belly, Epicranius
pulls scalp backward
Procerus
depress eyebrows medially
Compressor Naris
compress cartilage at bridge of nose
dilator Naris
widens, dilates nostrils & anterior nasal aperture
Depressor Septi
widens nostril
Corrugator Supercilii
draw eyebrow medial & down (forms vertical furrow between eyebrows)
Levator Labii Superioris
raises & everts upper lip
Levator Labii Superioris Alaque Nasi
raises & everts upper lip; dilates nostril
zygomaticus Minor
raises upper lip; produces nasolabial groove
zygomaticus Major *
draws angle up 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 palpebra superioris
elevates upper eyelid
superior rectus
elevate & adduct the cornea; inorsion
inferior rectus
depress & adduct the cornea; extorsion
medial rectus
adducts cornea
lateral rectus
abducts cornea
superior oblique *
depress & abduct the cornea; intorsion
Frontalis Belly, Epicranius
pulls scalp forward; wrinkles forehead & raises eyebrows
inferior oblique *
elevate & abduct 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 rotary movement