Cranial Nerve Screen Tests

Question 1

CN II

Answer 1

Optic (Sensory - Visual)

1. Visual acuity: eye chart
2. Visual fields: wiggle fingers

Question 2

CN III
CN IV
CN VI

Answer 2

Oculomotor, Trochlear, Abducens

1. Motor: Pupillary reflex: flashlight
2. Motor: Ptosis & visual tracking: drooping/make “H” for each eye

Question 3

CN V

Answer 3

Trigeminal

1. Sensory: V1, V2, V3 sharp dull on forehead, cheek, chin each side
2. Motor: palpate masseter and temporalis, clench teeth

Question 4

CN VII

Answer 4

Facial

1. Motor:
   - raise eyebrows
   - wrinkle forehead
   - frown
   - shut eyes tightly
   - smile
   - pucker/whistle

Question 5

CN VIII

Answer 5

Vestibulocochlear

1. Head thrust test: pts eyes on PTs nose, flexed head to 30*, quick rotation (small amplitude)

Question 6

CN XI

Answer 6

Accessory

1. Motor: MMT of Upper Trapezius (shrug)
2. If suspicious, test SCM (rotate L & R) MMT

Question 7

CN XII

Answer 7

Hypoglossal

1. Motor: tongue muscles: have pt stick out tongue - side-side & up/down