Cranial Nerves

Question 1

CN I

Answer 1

Olfactory

Question 2

CN II

Answer 2

Optic

Question 3

CN III

Answer 3

Occulomotor

Question 4

CN IV

Answer 4

Trochlear

Question 5

CN V

Answer 5

Trigeminal

Question 6

CN VI

Answer 6

Abducens

Question 7

CN VII

Answer 7

Facial

Question 8

CN VIII

Answer 8

Vestibulocochlear

Question 9

CN IX

Answer 9

Glossopharyngeal

Question 10

CN X

Answer 10

Vagus

Question 11

CN XI

Answer 11

Spinal accessory

Question 12

CN XII

Answer 12

Hypoglossal

Question 13

How do you test cranial nerve II (optic)

Answer 13

Light reflex
Accommodation reflex
Visual acuity
Fundoscopy
Ichihara plates

Question 14

Which muscles does cranial nerve III (occulomotor) innervate

Answer 14

Medial, superior and inferior rectus
Inferior oblique
Levator palpebrae superioris
Constrictor pupillae

Question 15

Which muscle does cranial nerve IV (trochlear) innervate

Answer 15

Superior oblique

Question 16

Which muscle does cranial nerve VI (abducens) innervate

Answer 16

Lateral rectus

Question 17

How do you test cranial nerve V (trigeminal)

Answer 17

Sensation - ophthalmic, maxillary, mandibular
Muscles of mastication
Ask about sensitivity to sounds

Question 18

How do you test cranial nerve VII (facial)

Answer 18

Facial expression - raise eyebrows, frown, shut eyes, puff cheeks, purse lips, teeth smile
Ask about sensitivity to sounds
Ask about dry eyes and dry mouth
Ask about reduced taste

Question 19

How do you test cranial nerve VIII (vestibulocochlear)

Answer 19

Whisper test
Webers 
Rinnes
Rombergs
Gait

Question 20

How do you test cranial nerve X (vagus)

Answer 20

Uvula movement
Assess whether air escapes the nose when blowing their cheeks out
Swallow water

Question 21

How do you test cranial nerve IX (glossopharyngeal)

Answer 21

Ask about dry mouth

Ask about tast

Question 22

Which nerve supplies taste to the posterior 1/3 of the tongue

Answer 22

Glossopharyngeal (CN IX)

Question 23

Which nerve supplies taste to the anterior 2/3 of the tongue

Answer 23

Facial (CN VII)

Question 24

How do you test cranial nerve XI (spinal accessory)

Answer 24

Turn head against resistance

Shrug shoulders against resistance

Question 25

How do you test cranial nerve CN XII (hypoglossal)

Answer 25

Look at the tongue Movements Against cheek Say yellow lorry

Question 26

Damage to cranial nerve VI causes ?

Answer 26

Estropia at rest

Question 27

Damage to cranial nerve IV causes ?

Answer 27

Can't look down when looking nasally

Question 28

Damage to cranial nerve III causes ?

Answer 28

Down + out eye Ptosis Mydriasis (pupil dilation)