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Facial Nerve
Cole 6/21/11 lecture 2 hrs
42
Anatomy
Undergraduate 4
06/06/2011

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Term
1) somatic sensory
2) somatic motor
3) parasympathetics
4) special sensory
Definition
what types of innervation are carried by the facial nerve?
Term
1)external ear
2)ear canal
3)external tympanic membrane
Definition
where does the facial nerve supply somatic sensory to?
Term
NO
Definition
does the facial nerve supply smooth muscle?
Term
1)muscles of facial expression
2) stapedius
3) posterior digastric
4) stylohyoid
Definition
where does the facial nerve supply somatic motor to?
Term
1) pterygogopalatine ganglion (lacrimal gland, mucosa of the nasal cavity and palate)
2) submandibular ganglion (submandibular and sublingual glands)
Definition
describe the parasympathetic innervation from the facial nerve
Term
taste: anterior 2/3 of tongue
Definition
where does the facial nerve supply special sensory innervation to?
Term
the internal acoustic meatus
Definition
where do CN 7 & 8 exit the endocranial cavity?
Term
petrous temporal bone
Definition
what bone is the internal acoustic meatus in?
Term
jugular foramen
Definition
what hole in the skull do CN 9,10,11 go through?
Term
the large part (somatic motor)
the small part aka nervus intermedius (all other modalities - para, taste, somatic sense)
Definition
what are the 2 parts of the facial nerve?
Term
the geniculate ganglion, which is a SENSORY ganglia for both somatic sensory and taste
Definition
name the ganglion of CN 7 that is located right where the nerve splits the first time after exiting the internal acoustic meatus?
Term
the greater superficial petrosal nerve
Definition
what part of the facial nerve does not go through the facial canal?
Term
1) never to stapedius
2) chorda tympani
Definition
what branches off the facial nerve before it exits the facial canal?
Term
stylomastoid foramen
Definition
name the exit of the facial canal between the styloid and mastoid process
Term
somatic motor and somatic sensory
Definition
what type of information is carried by the part of the facial nerve that exits the stylomastoid foramen?
Term
preganglionic parasympathetics
taste
Definition
what info is carried by the chorda tympani?
Term
1)preganglionic parasympathetics
2)taste
Definition
what info is carried in the GREATER superficial petrosal nerve?
Term
sympathetics from the IC plexus, this joins up with greater petrosal
Definition
what info is carried by the deep petrosal nerve?
Term
nerve of the pterygoid canal
Definition
what nerve is formed by the deep petrosal nerve and the greater petrosal nerve?
Term
1) preganglionic parasympsthetics
2) postganglionic sympthetics
3) taste
Definition
what info is carried by the nerve of the pterygoid canal?
Term
greater superficial petrosal and the chorda tympani
Definition
what branches of the facial nerve carry taste?
Term
lingual nerve
Definition
name the chorda tympani once V3 joins it
Term
1) parasympathetics and taste from the chorda tympani
2) somatic sensory from V3 to anterior 2/3 of tongue
Definition
what info is carried by the lingual nerve?
Term
parasympathetics synapse here! the post ganglionics go to the submandibular and sublingual glands
Definition
what is in the submandibular ganglion?
Term
same as taste: chorda tympani to sublingual/submandibular glands
and greater superficial petrosal to lacrimal glans, nasal and oral mucosa
Definition
what branches of the facial nerve carry parasympathetics?
Term
parasympathetics synapsing, the post ganglionic fibers follow V3 branches to lacrimal, V2 nasal and greater and lesser palatine to the oral cavity
Definition
what is in the ptergopalatine ganglion?
Term
tastebuds in the roof of the mouth (they travel with the parasympathetics of the oral mucosa)

it does this via the greater and lesser palatine nerves
Definition
where does the greater superficial petrosal nerve supply taste to?
Term
Potent Tender Zygotes Bump Matt's Cervix

Posterior auricular
Temporal branch
Zygomatic
Buccal
Mandibular
Cervical

(also known as the ansa facialis in the parotid gland)
Definition
list the superficial facial nerve branches that come out the stylomastoid foramen:
Term
Bell's Palsy
Definition
a type of facial paralysis that is due to paralysis of muscles innervated by the facial nerve
Term
1)inflammation of the facial nerve
2)temporal bone tumors
3) tumors or inflammation of the parotid gland
4) surgery in the parotid region
5) mumps
6) parotid tumor
7) exposure to cold
8) herpes virus
9) psychosomatic causes
10) unknown
Definition
list the possible causes of Bells Palsy?
Term
1) mask-like facies (smooth wrinkles on affected side, flattened nasolabial furrow)
2) inability to blink or close eyelid, causing tears to spill down the cheek and possibly cause damage to the cornea
3) hyperacuisis (n to stapedius can't dampen sounds)
4) inability to close mouth -> drooling, dropping corner, speaking problems, eating problems (buccinator wiped out)
5) ptosis of the lower eyelid
Definition
what are the symptoms of Bell's Palsy?
Term
in the CN 7 motor nucleus
1) on the ipsalateral side to the upper face
2&3) on the contralateral side to the upper and lower face
Definition
where do upper motor neurons of CN 7 synapse?
Term
the facial canal, they split after
Definition
both LMN's of the facial nerve (upper and lower face) travel together in that structure?
Term
motor the lower half of the left facial muscles
Definition
what gets jacked up with a lesion to a UMN of the facial nerve on the right side?
Term
the right side upper and lower face will lost muscle innervation (maybe more)
the LMN to the upper face and the LMN to the lower face get knocked out
Definition
what gets jacked up if there is a LMN lesion to the right side facial canal?
Term
sphenoid bone, parallel to the pterygoid canal
Definition
what bone is the foramen rotundum in?
Term
foramen lacerum
Definition
what hole in the skull does the deep petrosal nerve go through?
Term
it goes under the trigeminal ganglion
Definition
what nerve does the greater superficial petrosal nerve travel with as it heads toward the foramen lacerum?
Term
1) first fibers go to V2
2) then the fibers go with infraorbital or more commonly zygomatic
3) they jump along V2(zygomatic nerve) to V1(lacrimal nerve) with a little branch
Definition
where do the postganglionic parasympathericsgo after the ptergopalatine ganglion? (What do they travel with?)
Term
pterygotympanic fissure in the temporal bone
Definition
what fissure does the chorda tympani pop out?
Term
submandibular ganglion
Definition
what ganglion is suspended by parasympathetics near the base of the tongue?
Term
hypoglossal nerve
Definition
what nerve is always inferior to the lingual nerve but travels nearby?
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