CRANIAL NERVES AND EYE PALSY

Question 1

CNI

Answer 1

olfactory

Question 2

CNII

Answer 2

optic

Question 3

CNIII

Answer 3

oculomotor

Question 4

CNIV

Answer 4

tochlear

Question 5

CNV

Answer 5

trigeminal

Question 6

CNV1

Answer 6

opthalamic

Question 7

CNV2

Answer 7

maxillary

Question 8

CNV3

Answer 8

mandibular

Question 9

CNVII

Answer 9

facial

Question 10

CNVIII

Answer 10

vestibulocochlear

Question 11

CNIX

Answer 11

glossopharyngeal

Question 12

CNX

Answer 12

vagus

Question 13

CNXI

Answer 13

accessory

Question 14

CNXII

Answer 14

hypoglossal

Question 15

olfactory (CNI) function

Answer 15

smell

Question 16

optic (CNII) function

Answer 16

vision
pupillary light reflex

Question 17

oculomotor (CNIII) function

Answer 17

extrinsic eye muscles and levator palpebrae superioris

Question 18

what are the 4 extrinsic eye muscles

Answer 18

superior rectus
inferior rectus
medial rectus
inferior oblique

Question 19

function of levator palpebrae superioris and cranial nerve innervation

Answer 19

elevates upper eyelid
CNIII (oculomotor)

Question 20

function of inferior oblique

Answer 20

elevate, abduct and laterally rotate eyeball

Question 21

trochlear (CNIV) function

Answer 21

superior oblique - moves eye down and out

Question 22

what modality is trigeminal (CNV)

Answer 22

1+2 - sensory
3 - sensory and motor

Question 23

function of abducens (CNVI)

Answer 23

lateral rectus movement laterally

Question 24

function of facial (CNVII)

Answer 24

sensation to part of ext ear
taste from ant 2/3 tongue, hard and soft palate
muscles of facial expression

Question 25

function of vestibulocochlear (CNVIII)

Answer 25

hearing and balance

Question 26

function of glossopharyngeal (CNIX)

Answer 26

sensation to oropharynx
carotid body and sinus
sensation and taste posterior 2/3rds tongue
parotid gland (parasympathetic supply)

Question 27

function of vagus (CNX)

Answer 27

parasympathetic control of heart, lungs and GI tract

Question 28

function of accessory (CNXI)

Answer 28

trapezius and sternocleidomastoid

Question 29

function of hypoglossal (CNXII)

Answer 29

intrinsic and extrinsic tongue muscles

Question 30

how does right 3rd nerve palsy present?

Answer 30

right eye turns down and out when looking forward
unable to adduct right eye

Question 31

how does right 4th nerve palsy present?

Answer 31

right eye turns upwards and outwards when looking forward
right eye elevates more as it moves medially

Question 32

how does right 6th nerve palsy present?

Answer 32

right eye turns medially when looking forward
unable to abduct right eye

Question 33

what cranial nerve is damaged if a pt presents with ptosis

Answer 33

oculomotor (CNIII)

Question 34

what cranial nerve is damaged if a pt presents with loss of light reflex?

Answer 34

optic (CNII)

Question 35

what cranial nerve is damaged if pt presents with superior fixation of the eye?

Answer 35

trochlear (CNIV)

Question 36

speech abnormalities’ may indicate?

Answer 36

glossopharyngeal/ vagus pathology

Question 37

facial asymmetry may indicate?

Answer 37

facial nerve palsy

Question 38

ptosis may indicate?

Answer 38

oculomotor nerve pathology

Question 39

pupillary abnormalities may indicate?

Answer 39

oculomotor nerve palsy

Question 40

what are gait issues associated with?

Answer 40

Parkinsons
stroke

Question 41

what nerve is affected in most pts with hearing aid?

Answer 41

vestibulocochlear

Question 42

how do you assess optic nerve (CNII)

Answer 42

assess pupil size
assess pupil shape
pupil symmetry
pupillary reflexes (shine light and observe ipsilateral eye)
swinging light test