Cranial Nerve Tests

Question 1

CN I

Answer 1

Olfactory

test for smell (coffee beans)

Question 2

CN II

Answer 2

optic

test for vision (hold up number on hand)

Question 3

CN III

Answer 3

oculomotor

moves eyes up and down, pupillary constriction (shine light in eyes)

Question 4

what is consensual light reflex?

Answer 4

thanks to optic nerve, the other eye will dilate when light is shone into other eye

Question 5

Sing the cranial nerve mnemonic song

Answer 5

Oh factory smell and see (optic),
Oculomotor move your eyes

T- trochlear cross your eyes
T- Trigeminial hurts your face

A - Abducens give side eye
F - facial: face and taste

V - Vestibulocochlear
Glossopharyngeal, Vagus, Accessory

Hypoglossal helped us sing this song!

Question 6

cranial nerve eye movement mnemonic

Answer 6

S are 4
L are 6
all the rest are three

Superior oblique – 4 – down and out
lateral rectus – 6 – give side eye
all the rest are 3 (superior and inferior rectus, medial rectus)

Question 7

CNV

Answer 7

Test sensation in three branches
Can they clench jaw?
Afferent Corneal blinking reflex?!?

Question 8

CNIV

Answer 8

crosseyed Down and in eye movement

Question 9

CNVI

Answer 9

Give side eye

Question 10

CNVII

Answer 10

Facial expression and anterior two thirds of tongue for taste 
Raise eyebrows
Scrunch eyes
Puff cheeks
Forced frown
Smile
Have them taste something

Question 11

what is it called when there is a disorder with CN VII?

Answer 11

Bell’s Palsy

Question 12

Facial sensation is innervated by (___), but muscles of facial expression are innervated by (___)

Answer 12

CN5

CN7

Question 13

CN VIII

Answer 13

vestibulococchlear
Hearing and balance
Stand behind them and make a sound in each ear
Close their eyes and see if they can balance

    - Rinne test:
        - Activate vibration fork and put it on mastoid process. See if they can hear that. Ask them to tell you when it stops. And then move it in front of their ear and see if they can continue to hear it. Sound should be coming through air more than bone. Air conduction should be twice as long. When it’s on the mastoid process, they should be listening through bone, and then when you move it to the ear, they should hear it just as long from just air
    - Weber Test
        - on Du 20, you should be able to hear it equally in both ears
        - If there is conductive hearing loss, it will lateralize to the bad side
        - If its neuronal, it will 
        - If it lateralizes to the conductive side, a person might need to have their ear looked at and cleaned out. Could be ear wax or a tumor

Question 14

CN IX

Answer 14

glossopharyngeal
- Sensation to back of tongue and throat
- Parasympathetics to salivary gland
- Posterior 1/3 bitter taste
Test:
tongue depressor tests afferent GAG reflex;
test elevation of the soft palate, and deviation of the uvula

Question 15

CN X

Answer 15

Vagus

• efferent gag reflex (can they do the gag or swallow reflex on their own?)
• diaphragm issues and acid reflux

Question 16

CN XI

Answer 16

acessory nerve

- shoulder shrug and SCM mobility

Question 17

CN XII

Answer 17

Hypoglossal

- stick out tongue, does it deviate to one side? it will deviate toward side of lesion.