cranial nerves

Question 1

cranial nerve 1?
name
fibers
arises from?

Answer 1

Olfactory nerve -smell

sensory

arise from cribifrom plate in anterior cranial fossa

Question 2

how does cranial nerve 1 come about?

Answer 2

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

Question 3

cranial nerve 2 explain?
name
arises
fibers

Answer 3

optic
sensory

vision
arises in optic canal in sphenoid bone

Question 4

cranial nerve 3?
name
fiber

function

Answer 4

oculomotor

motor/parasymp.

muscle function/pupil response

superior orbital fissure in sphenoidnboen into midbrain

Question 5

cranial nerve 4?
name
fibers

function

Answer 5

trochlear

motor

superior oblique eye muscle - eye movement

superor orbital fissure in sphenoid in midbrain

Question 6

cranial nerve 6?
name
fibers
function

arises

Answer 6

abducens

motor
lateral rectus muscle - eye movements

superior orbital fissure in sphenoid

Question 7

how does oculomotor nerve run to eye?

Answer 7

by nerve pathway to ciliary ganglion before innervating muscle of eye

Question 8

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

Answer 8

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

Question 9

SUPERIOR/INFERIOR alveolar nerve branches of?

and where?

Answer 9

above and below mouth

branches of trigemenal nerve

Question 10

cranial nerve 7?
name
fibers
function

arises from?

Answer 10

facial nerve

sensory/motot/parasymp

moving muscles of facial expression -taste/supplying HN glands

internal acoustic meatus

Question 11

cranial nerve 8?
name 
fibers 
function 
arises

Answer 11

vestibulocochlear

sensory

hearing and balance

internal acoustic meatus

Question 12

cranial nerve 9?
name 
fibers 
function
arises

Answer 12

glossopharyngeal

motor sensory and parasymp.

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

jugular foramen

Question 13

cranial nerve 10?
name
fibers
function 
arises 

branches?

Answer 13

vagus
motor
sensory
parasymp.

jugular foramen

superior laryngeal nerve & recurrent laryngeal nerve

Question 14

cranial nerve 11?
name 
fibers 
function 
airses from

Answer 14

accessory nerve
motor

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

Question 15

cranial nerve 12?
name 
fibers 
function 
arises from?

Answer 15

hypoglossal
motor

tongue movements
swallowing and speech

hypoglossal canal

Question 16

rhyme to know the cranial nerves?

Answer 16

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

Question 17

rhyme to learn fibers of cranial nerves?

Answer 17

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

Question 18

how to test optic nerve?4

Answer 18

visual acuity on chart

pupillary response to light

visual fields
fundoscopy

Question 19

how to test oculomotor nerve?

Answer 19

slow H movement

Question 20

bitemporal hemianopsia? damage where?

Answer 20

damage to optic chiasm

peripheral vision blindness

Question 21

left homonymous hemianopsia ? damage where?

Answer 21

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

Question 22

oculomotor nerve palsy symptoms? 3

Answer 22

droopy eyelid
eyeball abducted/out and down
no pupillary reflex

Question 23

loss of gag reflex due to which cn nerve damage?

Answer 23

glossopharyngeal nerve damage

Question 24

branches of vagus? 2

Answer 24

pharyngal

laryngeal

Question 25

special sensory in which cranial nerves?6

Answer 25

``` olfaction 1 vision 2 facial 7 vagus 10 glossopharyngeal 9 vestibulocochlear 8 ``` smell taste hearing vision

Question 26

muscles of chewing innervated by?

Answer 26

trigmenal

Question 27

muscles of larynx and pharynx innervated by?

Answer 27

vagus

Question 28

reflexes of trigeminla?

Answer 28

corneal relex | jaw reflex

Question 29

dilate pupils due to what damage/condition?

Answer 29

damage to parasympathetic innervation | -third nerve palsy

Question 30

small pupils due to what damage/condition?

Answer 30

damage to sympathetic innervation -horners syndrome

Question 31

third nerve palsy signs ? 3

Answer 31

eye movement disorder completly closed eyelid deviation of eye out and down dilated pupil

Question 32

3rd nerve palsy painful and painless CAUSES?

Answer 32

painful - compressed by PAC aneurysm/raised icp painless - diabetes/ hypertension

Question 33

BELLS PALSY? unilateral or bilateral? LMN OR UMN?

Answer 33

FACIAL nerve palsy unilateral facial weakness LMN

Question 34

DIFFERENCE BETWEEN stroke and bells palsy?

Answer 34

bells palsy = LMN | stroke = UMN

Question 35

Disarthria?

Answer 35

issues with speech

Question 36

``` bulbar palsy? LMN OR UMN? SYMPTOMS? bilateral/unilateral? AFFECT WHAT CN? ```

Answer 36

bilateral LMN lesion in medulla DYSARTHRIA/DYSPHAGIA etc cn 9,10,11,12

Question 37

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

Answer 37

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