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

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

Accessory

Question 12

CN XII

Answer 12

Hypoglossal

Question 13

CN I–Olfactory

Answer 13

smell (sensory)

Question 14

CN II–Optic

Answer 14

visual acuity, visual fields, ocular fundi

Question 15

CN III–Oculomotor

Answer 15

pupillary reactions (constriction, dilation)

Question 16

CN IV–Trochlear

Answer 16

extraocular movements

Question 17

CN V–Trigeminal

Answer 17

corneal reflexes, facial sensation, jaw movements

Question 18

CN VI–Abducens

Answer 18

lateral eye movement

Question 19

CN VII–Facial

Answer 19

facial movements

Question 20

CN VIII–Vestibulocochlear

Answer 20

hearing

Question 21

CN IX–Glossopharyngeal

Answer 21

swallowing, rise of palate, gag reflex

Question 22

CN X- Vagus

Answer 22

swallowing, rise of palate, gag reflex

Question 23

CN XI- Accessory

Answer 23

movement of trapezius muscles

Question 24

CN XII- Hypoglossal

Answer 24

voice and speech, tongue movement (with V, VII, X)

Question 25

CN I test

Answer 25

test sense of smell with familiar and nonirritating odors (not ammonia)

Question 26

CN II test

Answer 26

visual acuity
visual fields by confrontation
opthalmoscope to examine optic fundus

Question 27

CN III test

Answer 27

palpebral fissures are usually equal in width
check pupils for size, regularity, light reaction, accommodation
assess extraocular movements by cardinal positions of gaze
assess for nystagmus

Question 28

CN IV test

Answer 28

palpebral fissures are usually equal in width
check pupils for size, regularity, light reaction, accommodation
assess extraocular movements by cardinal positions of gaze
assess for nystagmus

Question 29

CN V test

Answer 29

Motor function: palpate temporal and masseter as clench teeth; try to separate jaw by pushing on chin

Sensory function: cotton ball touch, corneal reflex

Question 30

CN VI test

Answer 30

palpebral fissures are usually equal in width
check pupils for size, regularity, light reaction, accommodation
assess extraocular movements by cardinal positions of gaze
assess for nystagmus

Question 31

CN VII test

Answer 31

mobility and facial symmetry–smile, frown, puff cheeks, show teeth, close eyes tightly (against attempt to open them), raise both eyebrows

Question 32

CN VIII test

Answer 32

assess hearing acuity

if loss present, Weber (lateralization) and Rinne (air and bone conduction)

Question 33

CN IX test

Answer 33

Assess person’s ability to swallow, and the voice for hoarseness or a nasal quality
say “ah” and watch soft palate and pharynx
midline uvula
gag reflex by lightly touching back of throat

Question 34

CN X test

Answer 34

Assess person’s ability to swallow, and the voice for hoarseness or a nasal quality
say “ah” and watch soft palate and pharynx
midline uvula
gag reflex by lightly touching back of throat

Question 35

CN XI test

Answer 35

shrug both shoulders against pressure

turn head side to side against hand

Question 36

CN XII

Answer 36

listen to articulation of person’s words

stick out tongue and move it from side to side (note any asymmetry, atrophy, or deviation from midline)