Cranial Nerves

Question 1

CN I

Answer 1

Olfactory:
Smell
Tested with various pungent odors (coffee, etc.)

Question 2

CN II

Answer 2

Optic:

Visual Acuity: Confrontation method to assess visual fields

Question 3

CN III

Answer 3

Oculomotor:

Eye movements: Follow the penlight through the six cardinal fields of gaze

Question 4

CN IV

Answer 4

Trochlear:
Eye movements (superior oblique): Same as oculomotor

Question 5

CN V

Answer 5

Trigeminal:

Superfical and deep structures of head and face, mastication: Corneal reflex, show teeth.

Question 6

CN VI

Answer 6

Abducens:

Specific eye movements: Testing same as oculomotor

Question 7

CN VII

Answer 7

Facial:
Taste of anterior 2/3 of tongue, sensation in ear canal, facial movements: Use salt and sugar for taste, evaluate corneal reflex, raise eyebrows, keeps eyes closed against resistance, puff cheeks.

Question 8

CN VIII

Answer 8

Acoustic:
Hearing: Ticking watch and whisper tests: Tuning fork with Rinne positive as normal when air conduction persists twice as long as bone conduction.

Question 9

CN IX

Answer 9

Glossopharyngeal:
Swallow, taste the posterior 1/3 of the tongue, pain touch and temp of mucosa and pharnyx: Check for deviation of uvula to unaffected side.

Question 10

CN X

Answer 10

Vagus:
Elevation of the uvula, swallow: Have patient say “ahh” and check uvula elevation. Check gag reflex and ability to swallow water.

Question 11

CN XI

Answer 11

Spinal accessory:

Innervates the trapezius and sternocleidomastoid: Shrug shoulders and turn head against resistance.

Question 12

CN XII

Answer 12

Hypoglossal:
Motor for the tongue: Push tongue against the inside of the cheek, stick out tongue and check for fasciculation and deviation.

Question 13

On Old Olympus Towering Top A Finn And German Viewed Some Hops

Answer 13

Olfactory
Optic
Oculomotor
Trochlear
Trigeminal
Abducens
Facial
Acoustic
Glossopharyngeal
Vagus
Spinal accessory
Hypoglossal