Neuroanatomy Revision Night: Cranial Nerves Flashcards
how many cranial nerves are above the pons
4
how many cranial nerves are in the medulla?
4
what is the olfactory nerve “called” before it goes through the cribriform plate
bulb
tract
olfactory dysfunction is associated with…
epilepsy/seizures
aura of migraine
the fibres posterior to the optic chiasm are called…
optic tract
when does a junctional scotoma appear?
transection of a nerve very close to the optic chiasm;
monocular blindness with a little bit of temporal involvement
optic tract visual pathology?
homonymous hemianopia
why is there macular sparing in a posterior visual problem?
the part of the visual cortex that supplies the macula has blood supply from posterior and middle cerebral arteries
H test tests for cranial nerves…
3
4
6
what nerve fibres does CN3 carry
somatic motor
parasympathetics
problems with what arteries can cause a problem with CN3
posterior cerebral artery
superior cerebellar artery
down and out eye…
CN3 palsy
CN4 moves the eye..
down and in
only nerve that emerges dorsally is….
CN4
head tilt and vertical diplopia…
CN4 palsy
“i get double vision when i walk down the stairs”….
CN4 palsy
where does CN6 emerge from
in between pons and medulla
what visual problem can you get in CN6 problems
horizontal diplopia
angle of the mandible is supplied by what nerve?
great auricular nerve
cavernous sinus thrombosis/infection will cause problems where?
OTOM CAT
oculomotor
trochlear
ocu
motor facial nerve function?
facial muscles
special sensory function of facial nerve
ant 2/3 tongue taste
parasympathetic function of facial nerve
submandibular
sublingual
lacrimal
name the only salivary gland not innervated by CN7? what nerve supplies it?
parotid
CNIX
what ganglion does the facial nerve form?
geniculate ganglion
facial nerve exits the cranial cavity via…
stylomastoid foramen
causes of facial nerve palsy?
parotid gland tumours (passes by parotid)
herpes infection
compression during forceps
bells palsy
cochlear component of CN8 arises from…
inferior cerebellar peduncle
what nerve comes from the cerebello-pontine angle?
CN8
symptoms of vestibular neuritis?
vertigo
nystagmus
loss of equilibrium
symptoms of labyrinthitis
hearing loss
tinnitus
vertigo
nystagmus
sensory and motor supply to the carotid body and sinus
S - CNIX
M- CN10
what controls taste at the back of the tongue?
vagus
nerve supply to epiglottis?
vagus
vagus innervates GI tract up to….
up to splenic flexure
right recurrent laryngeal nerve hooks under…
right subclavian artery
name the 2 portions of CNXI
cranial
spinal
name the entry and exit route of CNXI
foramen magnum
jugular foramen
cranial portion of CNXI exits via..
jugular foramen
