Cranial nerve pathology

Question 1

Occulomotor?

Answer 1

Ptosis and “down and out” eye

dilated fixed pupil

Question 2

Trochlear?

Answer 2

vertical diplopia

Question 3

Trigeminal

Answer 3

1. Trigeminal neuralgia
2. Loss of corneal reflex
3. Loss of facial sensation
4. Paralysis of mastication muscle

Question 4

Abducens nerve?

Answer 4

Horizontal diplopia

Question 5

Facial nerve?

Answer 5

1. Flaccid paralysis of upper and lower part of face
2. loss of corneal reflex
3. loss of taste

Question 6

Vestibulocochlear nerve?

Answer 6

1. Hearing loss
2. Vertigo
3. Nystagmus - repetitive movement of the eyes
4. acoustic neuroma- schwann cell tumours of cochlear nerve

Question 7

Glossopharyngeal nerve?

Answer 7

1. hypersensitive carotid reflex
2. Loss of gag reflex

Question 8

Vagus nerve?

Answer 8

1. uvula deviates away from lesion
2. loss of gag reflex

Question 9

Accessory nerve?

Answer 9

lesion causes weakness turning head towards contralateral side

Question 10

Hypoglossal nerve?

Answer 10

Tongue deviates towards side of lesion

Question 11

All cranial nerve lesions are ipsilateral except for?

Answer 11

Trochlea

Question 12

midbrain lesions would affect which cranial nerves?

Answer 12

3 and 4

Question 13

pontine lesions would affect which cranial nerves?

Answer 13

V, VI,VII, VIII

Question 14

medullary lesions would affect which cranial nerves?

Answer 14

IX,X,XI,XII