Practical II Muscles and Action Flashcards
Frontalis Belly, Epicranius
Pulls scalp forward, wrinkles forehead and raises eyebrows
Occipitalis Belly, Epicranius
Pulls scalp backwards
Procerus
Depress eyebrows medially
Compressor Naris
Compress cartilage at bridge of nose
Dilatator Naris
Widens, dilates nostrils and anterior nasal aperature
Depressor Septi
Widens nostril
Corrugator Supercillii
Draws eyebrow medial and down (forms vertical furrow between eyebrows)
Levator Labii Superioris
Raises and everts upper lip
Levator Labii Superioris Alaeque Nasi
Raises and everts upper lip; dilates nostril
Zygomaticus Minor
Raises upper lip; produces nasolabial groove
Zygomaticus Major
Draws angle of mouth up and out
Leator Anguli Oris
Raises angle of mouth; produces nasolabial groove
Orbicularis Oris
Close mouth; purse and protrude lips
Buccinator
Compress cheeks against teeth
Risorius
Draws back angle of mouth
Mentalis
Raises and protrudes lower lip
Depressor Labii Inferioris
Draws lower lip down
Depressor Anguli Oris
Draws corner of mouth down and out
Levator Palpebra Superioris
Elevates upper eyelid
Superior Rectus
Elevate and adduct the cornea; intorsion
Inferior Rectus
Depress and adduct the cornea; extorsion
Medial Rectus
Adducts cornea
Lateral Rectus
Abducts cornea
Superior Oblique
Depress and abduct the cornea; intorsion
Inferior Oblique
Elevate and abduct the cornea; extorsion
Temporalis
Elevate and retract mandible
Masseter
Elevate and protract mandible
Medial Pterygoid
Elevate and protract mandible; assits in gliding or rotatory movement
Lateral Pytergoid
Protracts mandible; pulls disc forward; depress chin and assist in gliding or rotatory movement
