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Muscles of facial expression (Angular group (Levator Labii Superioris (O:…
Muscles of facial expression
Angular group
Levator Labii Superioris
O: infraorbital margin
I: upper lip
elevate, evert upper lip
Levator Labii Superioris Alaque Nasi
O: frontal process of maxilla
I: alar cartilage lateral upper lip
Elevate, evert upper lip, dilate nares
Depressor Labii inferioris
O: oblique line of mandible
I: lower lip, blends w OOR
sorrow, doubt
Zygomaticus major
O: Zygomatic bone
I: modiolus, blends w OOR
elevate, retract angle of mouth eg. Smile, laugh
Zygomaticus minor
O: zygomatic bone
I: upper lip, partially blends w LLS
elevate upper lip, expose upper teeth
Vertical group
Mentalis
O: incisive fossa of mandible
I: Skin of chin
Elevate, protrude lower lip, POUT
Depressor Anguli Oris
O: mandible
I: modiolus, blend w OOR, risorius
Depress angle of lip
Levator Anguli Oris
O: below infraorbital foramen
I: modiolus
Assists smile
Transverse group
Risorius
O: Fascia over masseter, parotid gland and/or mastoid process
I: modiolus
Draw corner of mouth laterally
Buccinator
O: Pterygomandibular raphe, alveolar processes of maxilla, mandible
I: OOR
Trumpet
Circular group
Obicularis Oris
Encircles mouth
I: angle of mouth
O: modulus of mouth
pouting, grimacing, labial seal
Eye region
Obicularis oculi
palpebral
O: medial palpebral ligament
blinking
Orbital
O: frontal bone & maxilla
Winking
Procerus
Corrugator supercili
O: Medial supercilliary arch
I: skin near supraorbital margin
worry/frown
Nasal region
Procerus
O: fascia of nasal bones, cartilages
I: epicranial aponeurosis
concentrating
Nasalis
O: Maxilla, alar cartilage of nose
I: bridge of nose
flare nostrils
Depressor septi
Nasal dilators