Cranial Nerves

Question 1

Olfactory

Answer 1

• CN I
• Sensory: olfaction
• Cerebrum origin
• loss of smell if damaged

Question 2

Optic

Answer 2

• CN II
• Sensory: vision
• Diencephalon origin
• loss of sight if damaged

Question 3

Oculomotor

Answer 3

• CN III
• Motor: eye muscle & iris
• Midbrain origin
• trouble with light and vision if damaged

Question 4

Trochlear

Answer 4

• CN IV
• Motor: superior oblique muscle of the eye
• Midbrain origin
• double vision or cross eyed if damaged

Question 5

Trigeminal

Answer 5

• CN V
• Motor & Sensory
  V1: forehead, orbit, brow
  V2: cheek, nose, palate
  V3: mixed: lower gums, teeth, lip, muscles of mastication
• Pons origin
• trouble with chewing if damaged.

Question 6

Abducens

Answer 6

• CN VI
• Motor- lateral rectus muscle of eye
• Pons origin
• eye movement issues when damaged.

Question 7

Facial

Answer 7

• CN VII
• Motor & Sensory: taste, 2/3 tongue
  facial muscles, sternocleidomastoid
• Pons origin
• Drooping face and facial paralysis if damaged

Question 8

Vestibulocochlear

Answer 8

• CN VIII
• Sensory: hearing and balance
• Pons & medulla origin
• damage to causes equilibrium to be off.

Question 9

Glossopharyngeal

Answer 9

• CN IX
• Motor & sensory: taste
  pharynx, parotid gland
• Medulla origin
• trouble with sense of taste in food if damaged

Question 10

Vagus

Answer 10

• CN X
• Motor & sensory: heart, respiratory and gut
• Medulla origin
• trouble with bowl movements through intestine when damaged

Question 11

Accessory

Answer 11

• CN XI
• Motor: palate, sternocleidomastoid
• Medulla & spinal cord
• stiff shoulder/neck with damage

Question 12

Hypoglossal

Answer 12

• CN XII
• Motor: tongue
• Medulla origin
• atrophy of the tongue muscle if damaged