Cranial Nerves

Question 1

Olfactory

Answer 1

CN1
Type: Sensory
Function: Smell
Test: Eyes closed, test one nostril at a time. Identify smell, ideally 3x. Provide choices for individuals with word finding difficulty. Avoid pungent overs to not stimulate the mucous membrane

Question 2

Optic

Answer 2

CN2
Type: Sensory
Function: Vision (pupil size and reactivity)
Test-
Color Vision: Ishara plates
Visual Acuity: Snellen Chart
Visual Fields: H&X Test
Visual Reflexes: Pulpillary Response by shining light on one pupil
Visual Inattention: Moving Both Fingers at the same time

Question 3

Oculomotor

Answer 3

CN3
Type: Motor
Function: Eye Muscle Movement (Lateral Deviation)
Test: Tracking H & X (note smoothness and distance)

Question 4

Trochlear

Answer 4

CN4
Type: Motor
Function: Eye Muscle Movement
Test: Tracking H & X (note smoothness and distance)

Question 5

Trigeminal

Answer 5

CN5
Type: Sensory and Motor
Function: Chewing, facial and mouth sensation, corneal reflex
Test: Open jaw- move side to side, bite and clench teeth, feel master and temporals

Question 6

Abducens

Answer 6

CN6
Type: Motor
Function: Eye Muscles/ Movement (turns eye laterally)
Test: Visual Tracking H & X (note smoothness and distance)

Question 7

Facial

Answer 7

CN7
Type: Sensory and Motor
Function: Facial Expression
Test: Raise eyebrow, puff out cheeks, smile, frown; taste (sweet, sour, salty(

Question 8

Vestibulocochlear

Answer 8

CN8
Type: Sensory
Function: Hearing and Balance
Test-
Rhinne Test: Place sounding turning fork on mastoid process, then next to their ear ask which is louder (second should be) *whisper in ear

Question 9

Glossopharyngeal

Answer 9

CN9
Type: Sensory and Motor
Function-
Sensory: Gag Reflex
Motor: Swallowing/ Taste
Test: Gag reflex, touch arches of pharynx, have them swallow

Question 10

Vagus

Answer 10

CN10
Type: Sensory and Motor
Function-
Motor: Miuscles of Swallow/Speech
Special Sensory: Taste behind tongue
Sensory: Throat, heart, lungs
Parasympathetic: Digestive, respiration, heart rate
Test: Observe uvula symmetry during "aaah"; observe uvula symmetry; no assessment for organs

Question 11

Accessory

Answer 11

CN11
Type: Motor
Function: Motor to SCM and Trapezius
Test: Shrug shoulders, Turn head side to side against resistance; Hand over laryngeal muscle and ask client to swallow (note rise and fall)

Question 12

Hypoglossal

Answer 12

CN12
Type: Motor
Function: Tongue
Test: Stick out tongue, not deviation, move tongue side to side, cheek puff with resistance, look for fasciculations