Disorders of Cranial Nerves

Question 1

Which cranial nerve controls pupillary constriction?

Answer 1

III

Question 2

Which cranial nerve controls lacrimation?

Answer 2

VII

Question 3

Which cranial nerve controls the submandibular and sublingual salivary glands?

Answer 3

Chorda Tympani of CN VII

Question 4

Which nerve controls the parotid salivary glands?

Answer 4

IX

Question 5

Which cranial nerve controls input to the organs in the thorax?

Answer 5

X

Question 6

Which cranial nerve nuclei are located in the Midbrain?

Answer 6

III

IV

Question 7

Which cranial nerve nuclei are located in the Pons?

Answer 7

V
VI
VII

Question 8

Which cranial nerve nucleus is located at the pontomedullary junction?

Answer 8

VIII

Question 9

What condition is often associated with optic neuritis?

Answer 9

MS

Question 10

What are some symptoms of optic neuritis?

Answer 10

Monocular visual loss
Reduced visual acuity
Pain on eye movement
Reduced colour vision
Swollen optic disc

Question 11

What is the effect of optic neuritis?

Answer 11

Demyelination of the optic nerve

Question 12

What classification of drugs are known to cause constricted pupils as well as Horner’s syndrome?

Answer 12

Opiates

Question 13

What is trigeminal neuralgia often caused by?

Answer 13

Vascular loop causing compression CN V?

Question 14

How does trigeminal neuralgia present?

Answer 14

Paroxysmal attacks of lancinating pain?

Question 15

Which drug is used to treat trigeminal neuralgia?

Answer 15

Carbamazepine

Question 16

What symptom may precede Bell’s palsy?

Answer 16

Pain behind the ear

Question 17

What are some symptoms of pseudobulbular palsy?

Answer 17

Dysarthria
Dysphonia 
Dysphagia
Spastic immobile tongue
Brisk jaw jerk
Brisk gag reflex

Question 18

What may cause a pseudobulbular palsy?

Answer 18

Bilateral UMNL

E.g. Vascular lesion of the internal capsules

Question 19

What may cause a bulbar palsy?

Answer 19

Bilateral LMNL affecting CN IX-XII

Question 20

What must we take great caution with when caring for patients with a bulbar palsy?

Answer 20

Feeding