Cranial Nerves

Question 1

Mnemonic for Memorizing cranial nerves

Answer 1

Old Opin Occasionally Tries Trigonometry And Feels Very Gloomy, Vague, and Hypoactive

Question 2

Mnemonic for afferent (sensory) and efferent (motor)

Answer 2

Some Say Marry Money But My Brother Says Big Business Makes Money

Question 3

CN I

Answer 3

Olfactory

Question 4

Test for CN I

Answer 4

Identify familiar odors (i.e. coffee, chocolate)

Question 5

CN I: afferent or efferent

Answer 5

Afferent (sensory): Smell-nose

Question 6

CN II

Answer 6

Optic

Question 7

Test for CN II

Answer 7

Test Visual Fields

Question 8

CN II: Afferent or Efferent or both

Answer 8

Afferent (sensory): Sight-eye

Question 9

CN III

Answer 9

Oculomotor

Question 10

Test for CN III

Answer 10

Upward, downward, and medial gaze

Reaction to light

Question 11

CN III: Afferent/Efferent/Both

Answer 11

Efferent (motor):

Voluntary motor: Levator of eyelid; superior Meidal and inferior reaction; inferior oblique muscle of eyeball

Autonomic: smooth muscle of eyeball

Question 12

CN IV

Answer 12

Trochlear

Question 13

CN IV Test?

Answer 13

Downward and inward gaze (Extropia/Esotropia)

Question 14

CN IV: Afferent/Efferent/ Both

Answer 14

Efferent (motor)

Voluntary motor: superior oblique muscle of eyeball

Question 15

CN V

Answer 15

Trigeminal

Question 16

CN V test?

Answer 16

Corneal reflex
Face sensation
Clench teeth; push down on chin to separate jaw

Question 17

CN V: Afferent/Efferent/Both

Answer 17

Both.

Afferent (sensory): Touch, pain: skin of face, mucous membranes of nose, sinuses, mouth and ANTERIOR Tongue

Efferent (motor): Voluntary motor: muscles of mastication

Question 18

CN VI

Answer 18

Abducens

Question 19

CN VI test?

Answer 19

Lateral gaze (exotropia)

Question 20

CN VI: afferent/efferent/both

Answer 20

Efferent (motor)

Voluntary motor: lateral Rectus muscle of eyeball

Question 21

CN VII

Answer 21

Facial

Question 22

CN VII Test?

Answer 22

Close eyes tight
Smile and show teeth
Whistle and puff cheek s
Identify familiar tastes (e.g. sweet, sour)

Question 23

CN VII: Afferent/Efferent/Both

Answer 23

Both

Afferent (sensory): Anterior tongue

Efferent (motor): Voluntary motor: Facial muscles
Autonomic motor: Lacrimal, submandibluar, and sublingual glands

Question 24

CN VIII

Answer 24

Vestibulocochlear (acoustic nerve)

Question 25

CN VIII Test?

Answer 25

Hear watch ticking
Hearing tests
Balance and coordination tests

Question 26

CN VIII: Afferent/Efferent/Both

Answer 26

Afferent (Sensory): Hearing: Ear Balance: Ear

Question 27

CN IX

Answer 27

Glosspharyngeal

Question 28

CN IX Test?

Answer 28

Gag Reflex

Ability to Swallow

Question 29

CN IX: Afferent/Efferent/Both

Answer 29

Both

Afferent (Sensory): Touch, pain: POSTERIOR Tongue (1/3), pharynx
Taste: Posterior tongue

Efferent (motor): Voluntary motor: Select Muscles of pharynx
Autonomic motor: Parotid gland

Question 30

CN X

Answer 30

Vagus

Question 31

CN X test?

Answer 31

Gag reflex
Ability swallow
Say “aaahhhh”

Question 32

CN X: Afferent/Efferent/Both

Answer 32

Both

Afferent (sensory): Touch, pain: Pharynx, larynx, bronchi
Taste: Tongue, epiglottis

Efferent (motor): Voluntary motor: Muscles of palate, pharynx, and larynx
Autonomic: Thoracic and abdominal viscera

Question 33

CN XI

Answer 33

Spinal accessory

Question 34

CN XI Test:

Answer 34

Resisted shoulder shrug

Question 35

CN XI: Afferent/Efferent/Both

Answer 35

Efferent (motor): Voluntary motor: SCM and trapezius muscles

Question 36

CN XII

Answer 36

Hypoglossal

Question 37

CN XII Test?

Answer 37

Tongue protrusion (if injured, tongue deviates toward injured side [ipsilateral side])

Question 38

CN XII: Afferent/Efferent/Both

Answer 38

Efferent (Motor): voluntary motor: muscles of the tongue