Cases of CN Damage

Question 1

If CN1 damaged?

Answer 1

Difficulty smelling

Question 2

If CN2 damaged?

Answer 2

Hard/unable to see

Question 3

If CN3 damaged?

Answer 3

Difficulty moving eyes in many directions

Question 4

If CN4 damaged?

Answer 4

Difficulty moving eyes downward and medially

(because superior oblique would pull on the eye from the top, forcing it to look down)

Question 5

If CN6 damaged?

Answer 5

Difficulty abducting or pulling eyes away from midline (outward gaze)

Question 6

If CN5 damaged?

Answer 6

Difficulty chewing if damage done to mandibular, and senses of mandibular parts like tongue (FEEL, not TASTE) and lips
Difficulty sensing cheeks and face area for maxillary
Difficulty feeling upper face like forehead if damaged ophthalmic

Question 7

If CN7 damaged?

Answer 7

Difficulty making facial expressions
Difficulty sensing taste
Hard for glands to secrete what they’re supposed to

Question 8

If CN8 damaged?

Answer 8

Difficulty hearing and/or balancing the body

Question 9

If CN9 damaged?

Answer 9

Difficulty swallowing
Difficulty sensing back of tongue, pressure, and oxygen
Difficulty gagging
Difficulty making saliva

Question 10

If CN10 damaged?

Answer 10

Difficulty closing nasal opening while swallowing
Difficulty sensing lower throat and visceral organs
Difficulties with heart rate, breath, sweating, and bowel movements
Difficulty vomiting or vomiting excessively

Question 11

If CN11 damaged?

Answer 11

Difficulty turning head or shrugging

Question 12

If CN12 damaged?

Answer 12

Difficulty with speech and swallowing with tongue