TMJ and FACE Flashcards
anterior face bones
- frontal bone
- zygomatic and nasal bones
- maxilla
- mandible
borders of the orbit
frontal
sphenoid
lacrimal
ethmoid
maxilla
zygomatic
what nerve innervates the muscles of the face?
facial nerve (CN VII)
Orbicularis oculi: action
gently shuts the eye
forcefully shuts the eye (winking)
occipitofrontalis: action
wrinkles forehead, lifts eyebrows
nasalis: action
flares the nostril
procerus: action
draws down medial angle of eyebrow, produces horizontal wrinkles over nose
depressor septi: action
pull nose inferiorly (bunny nose)
depressor anguli oris: action
frown
depressor labii inferioris: action
draws lower lip downward and laterally; like a partial cringe
mentalis: action
raises and protrudes lower lip
corrugator supercilli: action
draws eyebrows medially and downward
risorius: action
retracts corner of mouth (half-effort grin)
zygomaticus: action
major: smile
minor: draws upper lip upward
orbicularis oris: action
closes lips; protrudes lips
buccinator: action
presses cheek against teeth; compresses distended cheeks (play the bugle)
platysma: action
tenses the skin of the neck and can bring corners of the mouth down
muscles of mastication
masseter
temporalis
medial pterygoid
lateral pterygoid
action of masseter
elevate mandible
action of temporalis
elevate and retract the mandible
action of medial ptyergoid
elevate and contralaterally deviate mandible
action of lateral pterygoid
protrusion and contralaterally deviate mandible
three signs of TMD
orofacial pain
restricted jaw function
joint noise
