Cranial Nerves

Question 1

CN I

Answer 1

Olfactory (sensory)
-smell
1) cover 1 nostril and smell different

Question 2

CN II

Answer 2

Optic (sensory)
-visual acuity
1) consensual contralateral light response
2) eye chart

Question 3

CN III

Answer 3

Oculomotor (motor)
-eye movement
1) eye movements except lateral and down/in
2) consensual ipsi light response
3) cover eye and pupillary constriction of contra

Question 4

CN IV

Answer 4

Trochlear (Motor)
-eye movement (down and in)
-H test

Question 5

CN V

Answer 5

Trigeminal (Both)
-Mandibular movement and face sensation

Motor: clench jaw and feel masseter and temporalis

Sensory: check in forehead (ophamalic), checks (maxillary), and jaw (mandibular)

Question 6

CN VI

Answer 6

Abducens (motor)
-lateral eye movements
-H test

Question 7

CN VII

Answer 7

Facial (both)
-facial movement and taste

Motor:
1) smile
2) frown
3) move eyebrows

Sensory:
-close eyes and place sweet/salt on anterior 2/3rds of tongue

Question 8

CN VIII

Answer 8

Vestibulocochlear (sensory)
-hearing and vestibular

Hearing:
1) rub fingers together
2) whisper word identification
3) Weber Test: tuning fork on head
4) Rhine Test: tuning fork on mastoid

Vestibular:
1) touch nose then pt finger
2) turn head while looking at thumb

Question 9

CN IX

Answer 9

Glossopharyngeal (Both)
-gag reflex and taste

Sensory:
1) sour/bitter taste on posterior 1/3 tongue

Motor:
1) swallowing

Question 10

CN X

Answer 10

Vagus (both)

Motor:
1) saw ah, uvula deviation to strong side
2)Swallowing
3) SCM

Sensory

Question 11

CN XI

Answer 11

Accessory (motor)

1) shoulder shrug
2) head turning

Question 12

CN XII

Answer 12

Hypoglossal (motor)

1) stick tongue out, deviates to weak side