Cranial Nerves

Question 1

somatic motor fibres supply what kind of muscle?

Answer 1

stratified

Question 2

visceral motor fibres supply what kind of muscle?

Answer 2

smooth

and glands

Question 3

olfactory nerve

motor or sensory? what is it for?

Answer 3

sensory

smell

Question 4

optic nerve

motor or sensory? what is it for?

Answer 4

sensory

vision

Question 5

oculomotor nerve

motor or sensory? what is it for?

Answer 5

motor

eye movement

Question 6

trochlear nerve

motor or sensory? what is it for?

Answer 6

motor

eye movement

Question 7

trigeminal nerve

motor or sensory? what is it for?

Answer 7

mixed

sensory for face and mouth + motor for muscles of mastication

Question 8

Abducens nerve

motor or sensory? what is it for?

Answer 8

motor

eye movement

Question 9

facial nerve

motor or sensory? what is it for?

Answer 9

mixed

muscles of facial expression + taste

Question 10

vestibulotrochlear nerve

motor or sensory? what is it for?

Answer 10

sensory

hearing and balance

Question 11

glossopharyngeal nerve

motor or sensory? what is it for?

Answer 11

mixed

swallowing + sensation from tongue

Question 12

vagus nerve

motor or sensory? what is it for?

Answer 12

mixed

muscles of the throat + visceral sensation

Question 13

accessory

motor or sensory? what is it for?

Answer 13

motor

soft palate, throat, neck (SCM + trapezius)

Question 14

hypoglossal

motor or sensory? what is it for?

Answer 14

motor

tongue

Question 15

what nerve fibres pass through the foramina of the cribriform plate of the ethmoid in the anterior cranial fossa?

Answer 15

olfactory nerve

Question 16

the optic nerve enters through the

Answer 16

optic canal

Question 17

LPS

Answer 17

levator palpebrae superioris

Question 18

eyelid movement is governed by what muscles?

Answer 18

Levator palpebrae superioris

Question 19

ptosis

Answer 19

drooping of the eyelid

Question 20

clinical signs of damage to the oculomotor nerve

Answer 20

ptosis

eyeball abducted and looking down

no pupillary reflex

no accommodation

Question 21

what is the clinical feature found when the trochlear nerve is damaged?

Answer 21

diplopia when looking down

double vision

Question 22

clinical feature of abducent nerve damage

Answer 22

diplopia

Question 23

clinical applications of V3 (trigeminal)

Answer 23

loss of muscles of mastication

loss of sensation over mandible/teeth etc

loss of the sneezing reflex

Question 24

what is the most frequently injured cranial nerve?

Answer 24

facial

Question 25

facial nerve damage leads to what condition?

Answer 25

bells palsy

Question 26

bells palsy clinical signs:

Answer 26

cannot frown

cannot close eyelid

cannot bare teeth

Question 27

vestibulocochlear nerves divides into

Answer 27

vestibular and cochlear nerves

Question 28

clinical signs of damage to the vestiublocochlear nerve

Answer 28

tinnitus (ringing in the ear)

deafness

vertigo

nystagmus

Question 29

cochlear nerve supplies the

Answer 29

cochlea

Question 30

vestibular nerve (of vestiublocochlear) supplies the

Answer 30

semi circular ducts

at the bottom of the canals

Question 31

damage to the glossopharyngeal nerve would result in

Answer 31

loss of taste at the back of the tongue

loss of gag reflex

Question 32

what clinical signs would you see in someone with a damaged vagus nerve?

Answer 32

difficulty swallowing

difficulty speaking

Question 33

what clinical signs would you see in someone with damaged accessory nerve?

Answer 33

weakness what shrugging and turning head

Question 34

the hypoglossal nerve controls the INTRINSIC muscles of the

Answer 34

tongue

Question 35

movement of the vocal cords is by the

Answer 35

vagus nerve