muscles of facial expression Flashcards
occipitofrontalis
O: Frontal belly: epicranial aponeurosis
Occipital belly: lateral 2/3 of superior nuchal line
I: Frontal belly: skin and subcutaneous tissue of eyebrows and forehead
Occipital belly: epicranial aponeurosis
A: Frontal: elevates eyebrows and wrinkles of forehead
Occipital: retracts scalp
N: Zygomatic
Temporal
orbicularis oculi
O: Medial orbital margin; medial palpebral ligament; lacrimal bone
I: Skin around margin of orbit
A: Closes eyelids gently and tightly
N: Zygomatic
Temporal
corrugator supercilli
O: Medial end of superciliary arch
I: Skin superior to middle of supraorbital margin and superciliary arch
A:Draw eyebrows medially and inferiorly
N:Temporal
Procerus
O: Nasal bone
I: Skin of lower forehead between eyebrows
A: Draws down medial angle of eyebrows
N: Temporal
nasalis
O: Maxilla
I: Transverse: aponeurosis across dorsum of nose
Alar: alar cartilage of nose
A: Transverse: compresses nasal aperture
Alar: draws cartilage downward and laterally opening nose
N:Buccal
Levator labii superioris alaeque nasi
O: Frontal process of maxilla
I: Alar cartilage of nose
A: Raises upper lip and opens nostril
N:Buccal
Levator labii superioris
O: Infra-orbital margin of the maxilla
I: Skin of upper lateral half of the upper lip
A: Raises upper lip
N: Buccal
zygomaticus minor
O: Anterior part of lateral surface of zygomatic bone
I: Upper lip just medial to corner of the mouth
A: Draws upper lip upward
N: Buccal
Zygomaticus major
O: Posterior part of lateral surface of zygomatic bone
I: Skin at corner of mouth
A: Draws corner of mouth upward and laterally
N: Buccal
Levator anguli oris
O: Infraorbital maxilla
I: Skin at corner of mouth
A: Raises corner of mouth
N: Buccal
Buccinator
O: alveolar margins of maxilla and mandible; ptergomandibular raphe
I: Blends with orbicularis oris
A: Presses cheek against the teeth
N:Buccal
risorius
O: Fascia over masseter muscle
I: Skin at corner of mouth
A: Retracts corner of mouth
N: Buccal
Platysma
O: Subcutaneous tissue of infraclavicular and supraclavicular regions
I: Base of mandible; skin of cheek and lower lip
A: Depresses mandible; tenses skin of inferior face and neck
N: Cervical
Orbicularis oris
O: where fibres of levator anguli oris, depressor anguli blend at corner of mouth; medial maxilla and mandible
I:Mucous membrane of lips
A: Closes and protrudes lips
N: Buccal
depressor anguli oris
O: Oblique line of mandible (anterolateral base)
I: Skin at corner of mouth; blends with orbicularis oris
A: Draws corner of mouth downward and laterally
I: Marginal
