CN + Examination

Question 1

Function of CN 1- olfactory

Answer 1

Olfaction

Question 2

CN 2-optic Function

Answer 2

vision

Question 3

Dorsal/Medial/Ventral/Ventromedial rotation is associated to which nerve?

Answer 3

CN 3-oculomotor

Question 4

Dorsomedial rotation of the eye is associated to which CN?

Answer 4

4 - trochelar

Question 5

CN 6 - abducens function

Answer 5

Lateral mov and globe retraction

Question 6

Balance and auditory perception is CN ?

Answer 6

8 -vestibulocochlear

Question 7

Swallowing via sensory/motor of pharynx is via which CN?

Answer 7

9 - glossopharyngeal

Question 8

Parasympathetic innervation of the heart/lungs/GI is due to which CN?

Answer 8

10 - vagus

Question 9

CN 11 (accessory) function

Answer 9

posture and neck movement

Question 10

How can you assess CN 7?

Answer 10

Face expression/Symmetry

Question 11

Eye position is used to test which CN?

Answer 11

3,4,6 (eye position) and 8 (balance)

Question 12

The menace response tests what CN?

Answer 12

CN 2 - visual perception
CN 7 - blinking

Question 13

The cerebral cortex for head movement and CN 2 test is through which test?

Answer 13

Visual Tracking and Navigation

Question 14

Pupil Size and Symmetry and PLR is assessed for which CN?

Answer 14

2 and 3

Question 15

The corneal reflex tests which CN?

Answer 15

CN V1 - corneal sensation
CN 6 - eye retraction

Question 16

What is used to assess CN V1/2 and 7?

Answer 16

Palpebral reflex

Question 17

Describe palpebral reflex testing

Answer 17

Elicit blink by touching medial and lateral aspect of the eyelids

Question 18

Describe the vibrissae response

Answer 18

Elicit blinking/lip movement by touching whiskers

Question 19

Which CN is tested in the vibrissae response apart from facial?

Answer 19

CN v2

Question 20

The chin pinch response technique is described as:

Answer 20

Elicit movement of head by touching ching

Question 21

The nasostimulation response is used to asses which CN?

Answer 21

CN V1/2 - nostril sensation and cerebral cortex for movement of head

Question 22

What is the name of the technique used to elicit a blink/ear movement by touching the inner pinna?

Answer 22

Pinna

Question 23

How do you induce physiological nystagmus?

Answer 23

by turning the head left and right

Question 24

Observing the eye for abnormal rhythmic movements is to test for?

Answer 24

Pathological Nystagmus

Question 25

The gag reflex is used to test which CN?

Answer 25

CN 9 and 10 (pharynx sensation)

Question 26

Which test is used to assess CN V3 only?

Answer 26

Jaw tone

Question 27

CN 12 is assessed by?

Answer 27

Observing tongue symmetry and touching it for motor response

Question 28

A patient presents to you with facial asymmetry. Which cranial nerve is most likely dysfunctional in this patient?

Answer 28

CN 7

Question 29

A patient presents to you for abnormal eye position. During your exam, the patient appears visual, but PLRs are absent. Which cranial nerve is most likely dysfunctional in this patient?

Answer 29

CN 3

Question 30

Another patient presents to you for abnormal eye position (medially rotated). During your exam, the patient has intact palpebral reflexes, but corneal reflex is absent. Which cranial nerve is most likely dysfunctional in this patient?

Answer 30

CN 6

Question 31

A patient presents to you for self-trauma of the face. During your exam you find an absent vibrissae, absent lateral palpebral reflex, intact medial palpebral reflex, and absent pinna reflex. What cranial nerve is likely responsible for the patient’s clinical signs?

Answer 31

CN V2 - maxilalry

Question 32

A patient presents to you for choking while eating and drinking. On exam, you are unable to elicit a gag reflex. What 2 cranial nerves could be responsible for the patient’s clinical signs?

Answer 32

9 and 10

Question 33

A patient presents to you for annual exam. During your evaluation, you notice severe atrophy of the tongue. What cranial nerve is most likely dysfunctional in this patient?

Answer 33

12

Question 34

A patient presents to you for excessive drooling and inability to eat or drink. You immediately notice the patient is unable to close the jaw. During your exam you find reduced jaw tone, absent chin pinch response, and atrophy of the muscles of mastication. Dysfunction of which cranial nerve is likely responsible for the patient’s clinical signs?

Answer 34

CNV3 - mandibular

Question 35

A young patient presents to you for a head tilt, falling over, and apparent dizziness. On your exam, you notice the patient is deaf. Which cranial nerve is likely dysfunctional in this patient?

Answer 35

8

Question 36

A patient presents to you for bumping into things at home. On exam, you note dilated pupils, absent menace response, absent PLR, absent tracking, and failure to navigate. Which cranial nerve is likely dysfunctional in this patient?

Answer 36

2

Question 37

A patient presents to you for chronic corneal ulceration. On exam, you find an absent corneal reflex, absent medial palpebral, and reduced nasostimulation on the affected side. Dysfunction of which cranial nerve is likely responsible for the patient’s clinical signs?

Answer 37

CN V1 -opthalmic