Muscles of the mouth
What activity does buccinator do?
Blowing
What action does mentalis do?
Lower lip depression
what does zygomaticus minor do?
Lift upper lip
Eyes: what action does orbicularis oculi do?
Closes the eye
What does auricularis do?
Wiggle ears
anterior,superior, and posterior auricularis.
what facial expression does Depressor anguli oris show?
Sadness
What actions does orbicularis oris do?
Pucker, seal to swallow
Nose: What does levator labii superioris alaeque nasi show?
Disgust
Scalp: what does occipitofrontalis do?
Elevates one eyebrow
What are the muscles of mastication?
Masseter, temporalis, medial and lateral pterygoids.
What action does depressor lability inferioris show?
Exposes lower teeth
What does platysma do?
Depress mandible.
Nose: What are the two muscles for nasalis and what do they do?
Transverse and alar nasalis.
regulate airflow.
Original and insertion of occipitalfrontalis (2 muscles)
O:galea aponeurotica
I: frontalis: skin above eyebrows
occipitalis: superior nuchal line
Masseter:what are the A,O,I, N?
A: mandible elevation, protraction
o: zygomatic arch
I: mandible angle, mandibular coronoid process and ramus of mandible
N: CN V trigeminal
What actions is levator anguli oris produce?
Bilateral contraction: smile
unilateral contractio: smirk
What does risorius do?
Side smile
Nose:What facial expression does procerus show?
Concentration
Actions of occipitofrontalis.
Frontalis: raise eyebrows and wrinkle forehead
occipitalis: retract galea posteriorly
Temporal is: what are the A, O, I, N.
A: mandible elevation, retraction
o: temporal fossa
i: mandubular coronoid process and ramus of mandible
n: CN V trigeminal
What action does levator labs superioris show?
Snarl
What does zygomatic major do?
Smile
Eyes: what facial expression does corrugated supercilii show?
Concern
Cranial nerve of occipitofrontalis?
CN VII facial
Medial pterygoid and lateral ptergoid: A, O, I, and N
Medial A: unilateral: contralateral lateral deviation
bilaterally: mandibular elevation, protraction
medial O: lateral pterygoid plate of sphenoid bone and maxilla
medial I: mandibular ramus
LATERAL A: unilateral: contralateral lateral deviation
bilaterally: mandible protraction
lateral O: superior head: sphenoid
inferior head: lateral pytergoid plate
Lateral I: TMJ disc, mandible
BOTH N : CN V trigeminal