3.5.1 Cranial Nerves

Question 1

Which nerve is commonly affected by Schwann cell tumors?

Answer 1

CN VIII

Question 2

Name the possible locations of aneurysms that will lead to sudden CN III palsy?

Answer 2

Posterior cerebral, superior cerebellar, or posterior communicating artery

Question 3

Answer 3

Question 4

Herpes zoster virus infection of the geniculate ganglia of the facial nerve. Presents with inflamed painful vesicles within the external auditory canal, ear drum, and sometimes the anterior 2/3 of the tongue.

Answer 4

Ramsay Hunt Syndrome

Question 5

What are the three main symptoms seen with Horner’s Syndrome? What causes these symptoms?

Answer 5

PAM is horny

P: ptosis

A: anhidrosis

M: Miosis

Loss of sympathetic innervation of head, usually unilateral

Question 6

Answer 6

Question 8

What is another name for acoustic neuroma?

Answer 8

Vestibular schwannoma

Question 9

Through which foramens in the skull do the branches of the trigeminal nerve exit the skull?

Answer 9

V₁: superior orbital fissure

V₂: Foramen rotundum

V₃: Foramen ovale

Question 10

Anosmia can occur in association with what medical condition?

Answer 10

Hypogonadism (Kallman Syndrome)

Question 11

Lesions where can lead to bitemporal hemianopsia or “tunnel vision”?

Answer 11

The optic chiasm (often due to pituitary tumor)

Question 12

Answer 12

Question 13

Answer 13

Ramsay hunt syndrome = herpes zoster oticus

Question 14

Condition: Loss of the ability to smell (can be unilateral)

Answer 14

Anosmia

Question 15

What are the four possible symptoms of CN III injury?

Answer 15

Lateral stabismus

Ptosis

Dilation of pupial (mydriasis)

Loss of accomodation of lens