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NERVOUS > cranial nerves > Flashcards

cranial nerves Flashcards

1
Q

cranial nerve 1?
name
fibers
arises from?

A

Olfactory nerve -smell

sensory

arise from cribifrom plate in anterior cranial fossa

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2
Q

how does cranial nerve 1 come about?

A

through olfactory tract to olfactory bulb giving off olfactory nerves at cribriform plate

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3
Q

cranial nerve 2 explain?
name
arises
fibers

A

optic
sensory

vision
arises in optic canal in sphenoid bone

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4
Q

cranial nerve 3?
name
fiber

function

A

oculomotor

motor/parasymp.

muscle function/pupil response

superior orbital fissure in sphenoidnboen into midbrain

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5
Q

cranial nerve 4?
name
fibers

function

A

trochlear

motor

superior oblique eye muscle - eye movement

superor orbital fissure in sphenoid in midbrain

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6
Q

cranial nerve 6?
name
fibers
function

arises

A

abducens

motor
lateral rectus muscle - eye movements

superior orbital fissure in sphenoid

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7
Q

how does oculomotor nerve run to eye?

A

by nerve pathway to ciliary ganglion before innervating muscle of eye

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8
Q

cranial nerve 5?
name
fibers
divisions and what each arise from?

A

trigeminal
sensory and motor

of face and mouth

3 divisions
ophthalmic V1 S = superior orbital fissure - pons
maxillary V2 S = formane rotundum - pons
mandibular V3 S + M = foramen ovale - pons

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9
Q

SUPERIOR/INFERIOR alveolar nerve branches of?

and where?

A

above and below mouth

branches of trigemenal nerve

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10
Q

cranial nerve 7?
name
fibers
function

arises from?

A

facial nerve

sensory/motot/parasymp

moving muscles of facial expression -taste/supplying HN glands

internal acoustic meatus

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11
Q 
cranial nerve 8?
name 
fibers 
function 
arises
A

vestibulocochlear

sensory

hearing and balance

internal acoustic meatus

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12
Q 
cranial nerve 9?
name 
fibers 
function
arises
A

glossopharyngeal

motor sensory and parasymp.

sensory to sinuses, throat
ear
tongue and voluntary movement of muscle at back of throat

jugular foramen

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13
Q 
cranial nerve 10?
name
fibers
function 
arises

branches?

A

vagus
motor
sensory
parasymp.

jugular foramen

superior laryngeal nerve & recurrent laryngeal nerve

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14
Q 
cranial nerve 11?
name 
fibers 
function 
airses from
A

accessory nerve
motor

control muscles of shoulder and neck - trapezius and sternocleidomastoid
jugular formane

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15
Q 
cranial nerve 12?
name 
fibers 
function 
arises from?
A

hypoglossal
motor

tongue movements
swallowing and speech

hypoglossal canal

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16
Q

rhyme to know the cranial nerves?

A

on on on they travelled and found Voldemort guarding very ancient Horcruxes

17
Q

rhyme to learn fibers of cranial nerves?

A

some say money matters, but my brother says big brains matter most

18
Q

how to test optic nerve?4

A

visual acuity on chart

pupillary response to light

visual fields
fundoscopy

19
Q

how to test oculomotor nerve?

A

slow H movement

20
Q

bitemporal hemianopsia? damage where?

A

damage to optic chiasm

peripheral vision blindness

21
Q

left homonymous hemianopsia ? damage where?

A

damage of right optic tract - left temporal/outer and right nasal/inner blindness

22
Q

oculomotor nerve palsy symptoms? 3

A

droopy eyelid
eyeball abducted/out and down
no pupillary reflex

23
Q

loss of gag reflex due to which cn nerve damage?

A

glossopharyngeal nerve damage

24
Q

branches of vagus? 2

A

pharyngal

laryngeal

25
Q

special sensory in which cranial nerves?6

A 
olfaction 1
vision 2 
facial 7
vagus 10
glossopharyngeal 9
vestibulocochlear 8

smell
taste
hearing
vision

26
Q

muscles of chewing innervated by?

A

trigmenal

27
Q

muscles of larynx and pharynx innervated by?

A

vagus

28
Q

reflexes of trigeminla?

A

corneal relex

jaw reflex

29
Q

dilate pupils due to what damage/condition?

A

damage to parasympathetic innervation

-third nerve palsy

30
Q

small pupils due to what damage/condition?

A

damage to sympathetic innervation

-horners syndrome

31
Q

third nerve palsy signs ? 3

A

eye movement disorder

completly closed eyelid
deviation of eye out and down
dilated pupil

32
Q

3rd nerve palsy painful and painless CAUSES?

A

painful - compressed by PAC aneurysm/raised icp

painless - diabetes/ hypertension

33
Q

BELLS PALSY?
unilateral or bilateral?
LMN OR UMN?

A

FACIAL nerve palsy
unilateral facial weakness
LMN

34
Q

DIFFERENCE BETWEEN stroke and bells palsy?

A

bells palsy = LMN

stroke = UMN

35
Q

Disarthria?

A

issues with speech

36
Q 
bulbar palsy?
LMN OR UMN?
SYMPTOMS?
bilateral/unilateral?
AFFECT WHAT CN?
A

bilateral
LMN lesion in medulla
DYSARTHRIA/DYSPHAGIA etc

cn 9,10,11,12

37
Q

pseudo bulbar palsy?
LMN/UMN?
symptoms?
affect what cn?

A

UMN - lesion in internal capsule
dysarthria/dysphagia etc
affecting muscles of face

bilateral

NERVOUS (5 decks)

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