Cranial Nerves

Question 1

CN I

Answer 1

Olfactory

Question 2

CN II

Answer 2

Optic

Question 3

CN III

Answer 3

Oculomotor

Question 4

CN IV

Answer 4

Trochlear

Question 5

CN V

Answer 5

Trigmeninal

Question 6

CN VI

Answer 6

Aducens

Question 7

CN VII

Answer 7

Facial

Question 8

CN VIII

Answer 8

Vestibulocochlear (auditory)

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

What does CN I do?

Answer 13

Smell

Question 14

What does CN II do?

Answer 14

Vision

Question 15

What does CN III do?

Answer 15

Eyelid and eyeball movement

Question 16

What does CN IV do?

Answer 16

Innervates superior oblique, turns eye downward and laterally

Question 17

What does CN V do?

Answer 17

1) Chewing

2) face and mouth touch and pain

Question 18

What does CN VI do?

Answer 18

Turns eyes laterally

Question 19

What does CN VII do?

Answer 19

1) Controls facial expressions
2) secretions of tears
3) saliva and taste

Question 20

What does CN VIII do?

Answer 20

1) Hearing equilibrium 2) sensation

Question 21

What does CN IX do?

Answer 21

1) Taste
2) sense of carotid
3) blood pressure

Question 22

What does CN X do?

Answer 22

1) Senses aortic blood pressure
2) slows heart rate
3) stimulates digestive organs
4) taste

Question 23

What does CN XI do?

Answer 23

1) controls trapezius and sternocleidomastoid

2) Controls swallowing movements

Question 24

What does CN XII do?

Answer 24

Controls tongue movements

Question 25

Which cranial nerve is the largest?

Answer 25

CN V ( trigeminal )

Question 26

What cranial nerve is the only one that exits the posterior side of the brainstem?

Answer 26

CN IV (trochlear)

Question 27

How many cranial nerves are responsible for eye movements?

Answer 27

Three: CN III (Oculomotor), IV (Trochlear), and VI (Abducens)

Question 28

What does “aducens” refer to?

Answer 28

The abducens nerve carries motor impulses to the lateral rectus eye muscle which moves the eye laterally causing abduction of the eye.

Question 29

Which cranial nerve is the longest?

Answer 29

CN X (Vagus) which reaches from the medulla to the digestive and urinary organs

Question 30

Which cranial nerves carry sensory information about blood pressure to the brain?

Answer 30

CN IX (Glossopharyngeal) and CN X (Vagus)

Question 31

What are some of the branches of the vagus nerve? (CN X)

Answer 31

1) Auricular nerve
2) Pharyngeal nerve
3) Superior laryngeal nerve
4) Recurrent laryngeal nerve

Question 32

What are the 3 major branches of the Trigeminal nerve?

Answer 32

1) Opthalmic nerve (V1)
2) Maxillary nerve (V2)
3) Mandibular nerve (V3)

Question 33

Where do the 3 major branches of the Trigeminal nerve converge?

Answer 33

Trigmeninal ganglion