Facial Expression Muscles Flashcards
Frontal belly of occipitofrontalis
O: galea aponeurotica
I: subcutaneous tissue of eyebrows
A: raises eyebrows, draws scalp anteriorly
N: facial nerve VII
Occipital belly of occipitofrontalis
O: occipital and temporal bone
I: galea aponeurotica
A: retracts scalp
N: facial nerve VII
Obicularis oculi
O: frontal and maxilla on medial margin of orbit
I: skin of eyelid
A: closes eyelid
N: facial nerve VII
Corrugator supercilii
O: medial portion of frontal bone
I: skin of eyebrows
A: adduced eyebrows (pulls them medially and inferiorly like furrowing them)
N: facial nerve VII
Obicularis oris
O: modiolus of mouth
I: skin of lips
A: closes and protrudes lips (duckface)
N: facial nerve VII
Levator labii superioris
O: maxilla and zygomatic bones
I: muscles of upper lips
A: elevates upper lip, flares nostril (think of the face you make when you are incredibly grossed out)
N: facial nerve VII
Zygomatics (major, minor)
O: zygomatic bone
I: superolateral angle of mouth and muscles of upper lip
A: elevates corners of mouth (smiling and laughing
N: facial nerve VII
Risorius
O: fascia of masseter zygomatic arch
I: modiolus at angle of mouth
A: abducts corner of mouth (draws edge of mouth laterally 😬)
N: facial nerve VII
Depressor labii inferioris
O: mandible
I: skin of chin below lower lip
A: depresses lower lip
M: facial nerve VII
Mentalis
O: anterior mandible
I: skin of chin below lower lip
A: protrudes lower lip
Buccinator
O: maxilla and mandible near molar teeth
I: orbicularis oris, lips
A: compresses cheek
N: facial nerve VII
Platysma
O: fascia covering pectoral is major and deltoid
I: mandible and skin of lower region of face
A: depresses lower lip and angle of mouth, opens jaw
N: facial nerve VIII
What type of muscle is the obicularis oculi?
A sphincter muscle - circular like the drawstrings of a backpack
Procerus
O: lateral nasal cartilages at bridge of nose and skin of forehead
I: aponeurosus at bridge of nose and skin of forehead
A: moves nose, chantes position, shape if nostrils
N: favial nerve VII
Nasalis
O: maxilla and alar cartilage of nose
I: bridge of nose
A: compresses bridge, depresses tip of nose; elevates corners of nostrils
N: facial nerve VII
