Eyes that move when they shouldn't

Oscillopsia:

Only occurs in acquired nystagmus

Only occurs in congenital nystagmus

Can occur in both acquired and congenital nystagmus, but more commonly in congenital

Can occur in both acquired and congenital nystagmus, but more commonly in acquired

Superior oblique myokomia is a nystagmus that causes:

Downbeat movement of both eyes

Torsional oscillopsia in both eyes

Torsional oscillopsia in one eye only

Upbeat movement of one eye

Superior oblique myokomia is caused by:

Compression of the 4th nerve root

Lesion of the abducens nucleus

Lesion of the MLF

Lesion of the PPRF

Certain head positions I.e. Lying down, can cause nystagmus in some patients

True

False

Treatments for oscillopsia do not need to be 100% effective but will be effective when the image is only moving below:

10 deg/s

5 deg/s

1 deg/s

15 deg/s

It is possible to have an acquired nystagmus and be asymptomatic

True

False

Nystagmus is defined as:

Initiated by a quick eye movement off target and a slow movement back

Initiated by a slow eye movement off target and a quick movement back

A horizontal increasing velocity waveform is typically seen in:

Vestibular nystagmus

INS

Cerebellar lesions

Acquired periodic alternating nystagmus responds to which treatment:

Oxcarbbamazine

Timonal

Memantine

Baclofen

Downbeat nystagmus is a sign of:

Cortical disease

Cerebellar disease

Not well localised

Normal ageing

Upbeat nystagmus is caused by

Cortical lesions

Cerebellar lesions

Lesions that are not well localised

Square wave jerks are a saccadic oscillation that are normally seen in everyone and increase with age

True

False

Which of the following has a gaze pattern similar to square wave jerks, but are larger

Opsoclonus

Ocular flutter

Psychogenic flutter

Macrosaccadic oscillations

Opsoclonus is commonly caused by what in children

Occult carcinoma

Neuroblastoma

Encephalitis

Ocular flutter

Can sometimes show brief fixation

Has no fixation

Psychogenic flutter is usually stimulated by

Leftward gaze

Convergence

Accommodation

Divergence

Eyes that move when they shouldn't

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