Facial Expression and Mastication Flashcards
Describe the layers of the SCALP
Skin Connective tissue Aponeurosis- Galea aponeurotica Loose connective tissue Pericranium
what is Galea Aponeurotica
links the frontalis and occipitalis muscles
what is in the loose connective tissue and what is the danger
emissary v drain to cranial sinus
spread infection
what makes up the temporomandibular joint
fibrocartilage disc and ligaments
what is in the superior compartment of the fibrocartilage disc and what movement does it do
mandibular fossa sup and disc inf
translational movement
what is in the inferior compartment of fibrocartilage disc and what does it do
disc sup and mandibular condyle inf
rotational movement
what are the TMJ motions
depression vs elevation
protrusion vs retraction
side to side extrusion
what muscles do protrusion of the jaw
lateral pterygoid assisted by medial pterygoid
what muscles do retraction of the jaw
post. fibrs temporalis, deep masseter, geniohyoid, digastric
what muscles elevate the jaw
temporalis, masseter, medial pterygoid
what muscles depress the jaw
digastric, geniohyoid, mylohyoid
gravity
what causes TMJ popping or clicking
hypermobile joint capsule
tight lateral pterygoid muscle
damage to the disc ant against articular tubercle
mandibular condyle reduces to the disc
what is the boundary for the infratemporal fossa
deep to zygomatic arch and ramus of mandible
post. maxilla and bordered by lateral pterygoid plate
what are the contents of the infratemporal fossa
lower temporalis lat and med pterygoid maxillary a pterygoid venous plexus otic ganglion
what are the boundary of the pterygopalatine fossa
roof- greater wing sphenoid medially- perpendicular plate of palatine anteriorly- posterior maxilla posteriorly- pterygoid process floor- pyramidal process of palatine
what are the contents of the pterygopalatine fossa
pterygopalatine ganglion
pterygopalatine part of maxillary a
what are the branches of the facial n
temporal zygomatic buccal mandibular cervical posterior auricular
two zebras bit my cookies
what muscles do the facial n provide somatic motor for
stapedius
stylohyoid
digastric
facial expression muscles
what ganglions are supplied by the facial n
pterygopalatine ganglion
submandibular ganglion
describe the pterygopalatine ganglion
lacrimal glands, nasal, palatine mucosa (greater petrosal n)
describe the submandibular ganglion
submandibular and sublingual salivary glands (chorda tympani)
what is the visceral sensation of the facial n
taste ant 2/3 tongue
what is the somatic sensation of the facial n
external ear
what nerve comes of the ophthalmic branch
supraorbital n
what nerve comes off the maxillary branch
infraorbital n
what nerve comes off the mandibular branch for sensory
mental n
what muscles are innervated by the mandibular branch
suprahyoid, tensor tympani, tensor veli palantini
which nerve detects sensory input at the mandibular angle
greater auricular n
what are the branches of the external carotid arteries
lingual a facial a ascending pharyngeal a ascending palatine a superficial temporal a maxillary a
what artery is crucial for facial expression
facial a
what are the branches of the maxillary a
middle meningeal a inferior alveolar a greater and lesser palatine a sphenopalatine a deep temporal a
functions of buccinator
connects orbicularis oris and superior pharyngeal constrictor
holds food in mouth and forcefully blows air out
what are the functions for orbicularis oculi
closes eyelids
orbital- wink tightly
palpebral- blink relex
what are the afferent and efferent nerves for orbicularis oris
afferent- CN V1
efferent- CN VII
proximal and distal attachments of zygomaticus major
lateral zygomatic bone
angle of mouth
how do you tell if its a true smile or a fake smile
true smile- symmetrical
fake smile- nonsymmetrical
proximal and distal attachments for medial pterygoid
- medial lateral pterygoid and pyramidal palatine bone
- tuberosity of maxilla
medial mandibular ramus and angle
innervation and blood supply for medial pterygoid
CN V medial pterygoid n
maxillary a pterygoid branch
functions of medial pterygoid
elevate and protract mandible
proximal and distal attachments of lateral pterygoid
- infratemporal surface and greater wing sphenoid -> joint capsule
- lateral surface of lateral pterygoid plate -> mandibular condyle
innervation and blood supply for lateral pterygoid
CN V lateral pterygoid n
maxillary a pterygoid branch
functions for lateral pterygoid
protract mandible
proximal and distal attachment for temporalis
temporal fossa
coronoid process and ant mandibular ramus
innervation and blood supply for temporalis
CN V deep temporal branch
ant and post deep temporal a
functions of temporalis
elevate and retract
proximal and distal attachments for masseter
zygomatic bone and arch
lateral mandibular ramus and angle
innervation and blood supply for masseter
CN V masseteric n
masseteric a
functions of masseter
elevate and protract mandible
what do/are the extrinsic muscles of the tongue do
mobilize the tongue
palatoglossus- up and down
styloglossus- back and forth
hyoglossus- back and flat
genioglossus- pull tongue forward
what do/are the intrinsic muscles of the tongue
change shape- curving and narrowing
superior longitudinal
vertical
transversus
inferior londitudinal
what nerves innervate the tongue muscles
palatoglossus- CN X
all others are CN XII
why do the two sided tongue muscles antagonize themsleves
to have muscle balance
affected side=deviation
what nerves does the hypoglossal n provide a shuttle for
C1 motor to geniohyoid, thyrohyoid, superior root of ansa cervicalis
inferior root ansa cervicalis= C2-3
what ganglion provides PS motor to the parotid galnd
otic ganglion- CN IX, lesser petrosal n, comes through foramen ovale or spinosum
what ganglion provides PS motor to the submandibular/sublingual glands
submandibular ganglion- CN VII, chorda tympani
CN VII dorsal nerves innrevate
scalp
CN VII ventral n innervates
face
an upper motor injury of CN VII results in
contralateral facial paralysis scalp spared can elevate eyebrows facial drop- difficult to close eyes/mouth, drooling, tears limbic lobe spared unequal smile unless with humor
a lower motor injury can result in
damage in and below the lower motor nuclei
ipsilateral scalp and facial paralysis
can’t elevate eyebrows
facial drop- difficult to close eyes/mouth, drooling, tears
dry eye and mouth IF greater petrosal n too
NO equal smile for all LMN pt
what are the 4 ganglions in the head
ciliary
submandibular
pterygopalatine
otic
what nerves shuttle off of V1
ciliary n
lacrimal n
what nerve shuttles off of V2
zygomatic n
what nerves shuttle off of V3
lingual n
auriculotemporal n
what nerves come off the ciliary ganglion
ciliary n
what nerves come off the pterygopalatine ganglion
zygomatic n
lacrimal n
what nerve comes off the submandibular ganglion
lingual n
what nerve comes off the otic ganglion
auriculotemporal n
what nerves come off V3 of first fibers
tensor tympani
tensor veli palatini
medial pterygoid
meningeal
which of the first fibers of V3 is sensory
meningeal
what comes off V3 of anterior division
temporal
massester
lateral pterygoid
buccal
which of the anterior division of V3 is sensory
buccal
buccal with facial n is motor
what are the nerves off of V3 posterior division
lingual
inferior alveolar
mylohyoid
auriculotemporal
which of the posterior division n of V3 is motor
mylohyoid
