Starred Lecture Items L20 Flashcards
how many bones of the cranium
22 bones
parts that make up the face
calvaria, floor of cranial cavity, viscerocranium
anterior face bones
frontal bone
zygomatic and nasal bones
maxilla
mandible
what is the pterion
thin bone on lateral face
“sleepy time button”
temporal bone parts
squamous, zygomatic process, tympanic, styloid process, petromastoid
orbital group muscles of the face
orbicularis oculi
corrugator supercilii
occipitofrontali
nasal group muscles of the face
nasalis
procerus
depressor septi
oral group muscles of the face
depressor anguli oris
depressor labii inferioris
mentalis
risorius
orbicularis oris
buccinator
what nerve enervates all muscles of the face
facial nerve (CN VII)
palpebral part of the obicularis oculi does what action
gently shuts eye
orbital part of the obicularis oculi does what action
forcefully shuts the eye (winking)
action of the occipitofrontalis (frontal belly)
wrinkles forehead, lifts eyebrows
transverse part of the nasalis action
comprises the nasal aperature
alar part of the nasalis action
flares the nostril
procerus action
draws downt the medial angle of the eyebrow
depressor septi action
pulls nose inferiorly
depressor anguli oris action
frown
depressor labii inferioris
draws lower lip downward and laterally (partial cringe)
mentalis action
raises and protrudes lower lip
corrugator supercilii action
draws eyebrows medially and downward
risorius action
retracts corners of mouth (half-effort grin)
zygomaticus major action
smile (corners of mouth up and away)
zygomaticus minor action
draws upper lip upward (showing teeth)
orbicularis oris action
closes lips; protrudes lips
buccinator action
presses cheek against teeth; compresses distended cheeks (think: play the bugle)
platysma action
tenses the skin of the neck and can bring down corners of the mouth
bell’s palsy vs stroke (CVA)
both are acute onset
bell’s palsy: whole side of the face (usually one side)
stroke: usually lower side of face
definition and characteristics of the mandibular fossa on temporalis bone
where the mandibular condyle comes in contact with the glenoid fossa of the temporal bone
flat surface and made of fibrocartilage
what is found between the the mandibular fossa and the mandibular head
articular disk
two parts of the disc of the TMJ joint and function
lower part: depression and elevation
upper part: protrusion and retraction
what is mastication and what are the muscles involved
chewing; masseter, temporalis, and medial and lateral pterygoid
masseter action
elevates mandible
temporalis action
elevate and retract the mandible
whats the strongest muscle in the body
masseter
trigeminal nerve (CN5) breaks into what three nerves
opthalmic
maxillary
mandibular
medial pterygoid two heads and muscle action
deep and superficial head
elevate and contralaterally deviate mandible
origins and insertions of muscles of mastication
lateral pterygoid two heads and muscle action
upper head and lower head
protrusion and contralaterally deviate mandible
what muscles form the sling in the jaw
masseter is on outside of jaw
medial pterygoid is on inside of jaw
temporalis is between
digastric muscle heads and actions
anterior belly: opens mouth by lowering mandible; raises hyoid
posterior belly: pulls hyoid upward and back
nerve enervation of digastric muscle
anterior belly: trigeminal nerve/mandibular n
posterior belly: facial nerve (VII)
ligaments of the tmj joint and what movement do they resist
temporomandibular ligament: limits lateral displacement
stylomandibular and sphenomandibular: limits protraction/ mandible coming forward
muscles involved in elevation of tmj (closing)
masseter temporalis and medial pterugoid
muscles involved in depression of tmj (opening)
lateral pterygoid (inferior belly)
muscles involved in protrusion of tmj
masseter
medial pterygoid
lateral pterygoid
muscles involved in retrusion of tmj
temporalis
muscles involved in lateral excursion/deviation of tmj
ipsi: temporalis
contra: medial/lateral pterygoid
what facial arteries have the external carotid artery as their parent structure
transverse facial artery
superficial temporal artery
maxillary artery
lingual artery
facial artery
what facial arteries have the maxillary artery as their parent structure
infra-orbital artery
buccal artery
mental artery
dermatomes of the head and neck
three signs of TMD (temporomandibular disfunction)
orofacial pain
restricted jaw function
joint noise (popping, locking, snapping)
bruxism
grinding of the teeth
plagiocephaly
flat side of skull
cranial nerve pneumonic
oh oh oh to touch and feel very good velvet ah
olfactory
optic
oculomotor
trochleau
trigeminal
abducens
facial
vestibulocochlar
glossopharyngeal
vagus
accessory
hypoglossal
