Cranial Nerves

Question 1

CN I

Answer 1

Olfactory nerve

Sense of smell

Close eyes, identify odors

Question 2

CN II

Answer 2

Optic nerve

Vision

Visual field test, eye chart, etc

Question 3

CN III

Answer 3

Oculomotor

Eye movement, levator eyelid

Object tracking up, down, medial

Ptosis

Question 4

CN IV

Answer 4

Trochlear nerve

Eye movement: down, lateral

Object tracking: inferiorly

Question 5

CN V

Answer 5

Trigeminal nerve

Sensory: face & tongue
Motor: mastication

Sharp/dull to face
Masseter/Temporalis contraction w/closure

Question 6

CN VI

Answer 6

Abducens

Eye movement: lateral gaze

Object tracking laterally

Question 7

CN VII

Answer 7

Facial nerve

Facial expression mm, taste, saliva/tear secretion, eye closure

Move mm of face, close eye
Sour/sweet/bitter taste test

Question 8

CN VIII

Answer 8

Vestibulocochlear nerve

Hearing, balance

Clock ticking at ear

Question 9

CN IX

Answer 9

Glossopharyngeal nerve

Sensation/taste to posterior tongue
Tonsils, pharynx

Gag reflex, vitals

Question 10

CN X

Answer 10

Vagus nerve

Pharynx, tongue, organs

Say ahh (uvula), swallow tests
Chest, abdominal pain

Question 11

CN XI

Answer 11

Accessory nerve

SCM, Traps, Pharynx mm

Shrug against resistance
Swallow

Question 12

CN XII

Answer 12

Hypoglossal nerve

Muscles of tongue

Tongue protrusion, watch for lateral deviation
Deviation will be towards lesion