Cranial nerves

Question 1

CN I

Answer 1

Olfactory nerve
Smell

Question 2

CN I pathway

Answer 2

Cribriform plateC

Question 3

CN II

Answer 3

Optic
Sight

Question 4

CN II pathway

Answer 4

Optic canal

Question 5

CN III

Answer 5

Oculomotor
Eye movements (except SO and LR)
Pupil constriction
Accommodation
Eyelid opening

Question 6

CN III palsy

Answer 6

Ptosis
Down and out eye
Dilated, fixed pupil

Question 7

CN III pathway

Answer 7

Superior orbital fissure

Question 8

CN IV

Answer 8

Trochlear
Superior oblique

Question 9

CN IV palsy

Answer 9

Defective downward gaze –> vertical diplopia

Question 10

CN IV pathway

Answer 10

Superior orbital fissure

Question 11

CN V

Answer 11

Trigeminal nerve
Facial sensation
Mastication

Question 12

CN V palsy

Answer 12

Trigeminal neuralgia
Loss of corneal reflex
Loss of facial sensation
Paralysis of mastication muscles
Deviation of jaw to weak side

Question 13

CN V pathway

Answer 13

V1 - supraorbital fissure
V2 - foramen rotundum
V3 - foramen ovale

Question 14

CN VI

Answer 14

Abducens
Lateral rectus

Question 15

CN VI palsy

Answer 15

Defective abduction –> horizontal diplopia

Question 16

CN VI pathway

Answer 16

Supraorbital fissure

Question 17

CN VII

Answer 17

Facial nerve
Facial movement
Taste - anterior 2/3 tongue
Lacrimation
Salivation

Question 18

CN VII palsy

Answer 18

Flaccid paralysis of lower and upper face
Loss of corneal reflex
Loss of taste
Hyperacusis

Question 19

CN VII path

Answer 19

Internal auditory meatus

Question 20

CN VIII

Answer 20

Vestibulocochlear nerve
Hearing and balance

Question 21

CN VIII path

Answer 21

Internal auditory meatus

Question 22

CN XI

Answer 22

Glossopharyngeal
Taste - posterior 1/3 tongue
Salivation
Swallow
Input from carotid body and sinus

Question 23

CN IX path

Answer 23

Gugular foramen

Question 24

CN X

Answer 24

Vagus
Phonation
Swallow
Viscera

Question 25

CN X palsy

Answer 25

Uvula deviates AWAY from affected side

Question 26

CN X path

Answer 26

Jugular foramen

Question 27

CN XI

Answer 27

Accessory Head and shoulder movement

Question 28

CN XI path

Answer 28

Jugular foramen

Question 29

CN XII

Answer 29

Hypoglossal Tongue movement

Question 30

CN XII path

Answer 30

Hypoglossal canal

Question 31

CN XII palsy

Answer 31

Tongue deviates towards affected side

Question 32

Cranial nerve mneumonic

Answer 32

Oh Oh Oh To Touch And Feel Very Good Velvet, Ah Heaven

Question 33

Cranial nerve motor, sensory or both mnemonic

Answer 33

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Question 34

Corneal reflex

Answer 34

Afferent - opthalmic V1 Efferent - facial VII

Question 35

Jaw jerk

Answer 35

Afferent - mandibular V3 Efferent - mendibular V3

Question 36

Gag reflex

Answer 36

Afferent - glossopharyngeal IX Efferent - vagal X

Question 37

Carotid sinus

Answer 37

Afferent - glossopharyngeal IX Efferent - vagal X

Question 38

Pupillary light

Answer 38

Afferent - optic III Efferent - oculomotor III

Question 39

Lacrimation

Answer 39

Afferent - ophthalmic V1 Efferent - facial VII