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
Upbeat nystagmus damps on convergence
True
False
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
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