Test 30  (Neuro-ophthalmology)
1. Vertical nystagmus:
a. occurs in phenytoin toxicity

b. in an unconscious patient suggests thalamic lesion

c. can present with oscillopsia

d. if upbeating indicates cerebellar tonsillar ectopia

e. if downbeating indicates a lesion in the pons 

2. The following are true about blepharospasm:

a. it is commoner in males than females

b. a brain scan should always be performed

c. it is often caused by compression of the facial
    nerve by intracranial artery

d. orbicularis oculi stripping is the treatment of choice

e. neuroleptic drug is a common cause

3. In Creutzfeldt-Jakob disease (CJD):

a. the protein content of the cerebrospinal fluid is raised

b. EEG shows characteristic waveform

c. death usually occurs within 12 months of onset

d. cortical blindness is common

e. the causative agent is a retrovirus

4. In multiple sclerosis :

a. onset with optic neuritis or sensory symptoms tend to 
    have better prognosis

b. low amplitude of visual evoked potential strongly 
    support optic nerve involvement

c. CSF lymphocytosis is a feature

d. oligoclonal band in the CSF supports the diagnosis

e. the prognosis is worse for males than females


5. In Bell's palsy:

          a. mild pain in the mastoid area is common at 
              the onset

b. corneal sensation is reduced

c. the blink reflex is impaired

d. complete facial palsy is associated with poor prognosis

e. electrophysiological testing is useful in predicting 

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