Cranial Nerves

Question 1

Name of CN I

Answer 1

Olfactory

Question 2

Function of CN I

Answer 2

Sensory - controls the sense of smell

Question 3

How to test CN I

Answer 3

Place a smell under the patient’s nose and see if they can identify it

Question 4

Name of CN II

Answer 4

Optic

Question 5

Function of CN II

Answer 5

Sensory - controls central and peripheral vision

Question 6

How to test CN II

Answer 6

• vision charts

- peripheral vision test - note when the patient can no longer see you fingers as you move them further away laterally

Question 7

Name of CN III

Answer 7

Oculomotor

Question 8

Function of CN III

Answer 8

sensory & motor - pupilar restriction

Question 9

How to test CN III

Answer 9

Penlight in eyes - look for PERRLA

Question 10

Name of CN IV

Answer 10

Trochlear

Question 11

Function of CN IV

Answer 11

motor - moves eye down

Question 12

How to test CN IV

Answer 12

6 cardinal fields of gaze

Question 13

Name of CN V

Answer 13

Trigeminal

Question 14

Function of CN V

Answer 14

motor & sensory - face

Question 15

How to test CN V

Answer 15

• check sensory with cotton ball and sharp object - looking for identification of sharp or dull sensation identification
• coordinal reflex check (mostly used in unconscious patients)
• look to see if they can move their mouth (talking, chewing)

Question 16

Name of CN VI

Answer 16

Abducens

Question 17

Function of CN VI

Answer 17

Motor - lateral eye movement

Question 18

How to test CN VI

Answer 18

6 cardinal fields of gaze

Question 19

Name of CN VII

Answer 19

Facial

Question 20

Function of CN VII

Answer 20

motor - facial movements and expression

Question 21

How to test CN VII

Answer 21

ask them to scrunch their eyes, smile, or puff up mouth

Question 22

Name of CN VIII

Answer 22

Acoustic

Question 23

Function of CN VIII

Answer 23

sensory - hearing, balance

Question 24

how to test CN VIII

Answer 24

• whisper test
• rub fingers by the ear
• ask about vertigo

Question 25

Name of CN IX

Answer 25

Glossopharyngeal

Question 26

Function of CN IX

Answer 26

sensory & motor - swallowing, taste

Question 27

how to test CN IX

Answer 27

gag reflex

Question 28

Name of CN X

Answer 28

Vagus

Question 29

Function of CN X

Answer 29

motor - tongue/throat

Question 30

how to test CN X

Answer 30

talking

Question 31

name of CN XI

Answer 31

Spinal accessory

Question 32

Function of CN XI

Answer 32

motor - neck, shoulder

Question 33

how to test CN XI

Answer 33

shrug shoulder against resistance

Question 34

name of CN XII

Answer 34

hypoglossal

Question 35

function of CN XII

Answer 35

motor - tongue movement

Question 36

how to test CN XII

Answer 36

stick out tongue