Cranial Nerve Palsies

Question 1

What are the signs of CN IX, X palsies?

Answer 1

Absent gag
Uvula deviation
Dysphagia

Question 2

What way does the uvula deviate in a CN IX, X lesion?

Answer 2

Away from lesion

Question 3

What can cause a CN IX, X palsy?

Answer 3

Medullary infarct

Jugular foramen issue

Question 4

What are the sings of a CN XII palsy?

Answer 4

Wasted tongue

Tongue deviation

Question 5

What way does the tongue deviate in a CN XII palsy?

Answer 5

Deviates towards lesion

Question 6

What can cause a CN III palsy?

Answer 6

Compressive lesion

• raised ICP
• tumour
• aneurysm

Vasculopathic lesion

• diabetic
• hypertension

Question 7

How do you differentiate between the causes of a CN III palsy?

Answer 7

Compressive lesion = pupil involved

Vasculopathic lesion = pupil spared

Question 8

What are the signs of CN III palsy?

Answer 8

‘down and out’ appearance of eyes

Ptosis

Question 9

What is the signs of CN IV palsy?

Answer 9

Eyeball is extorted, slightly elevated and adducted

Question 10

What do patients complain of with a CN IV palsy?

Answer 10

Diplopia on looking down

Question 11

What are the signs of CN VI palsy?

Answer 11

Unable to abduct eye on affected side