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1 A Comparison of Nystagmus and Saccadic Intrusions/OscillationsNystagmus can be classified into pendular and jerk waveforms, where both are generated by a slow, pathologic phase. Corrective phase (the position reset mechanism) differs. In pendular nystagmus, the eyes move back and forth with about the same velocity and amplitude, similar to that of a pendulum...Jerk Nystagmus; Flutter; Pendular Nystagmus; Square Wave Jerks; Opsoclonus,
2 Post-infectious ocular flutter and myoclonus syndromeThis is a 35-yo-woman presenting with oscillopsia following a viral illness. She described being easily startled, with "shakiness" of the head/neck and body. She had myoclonus and ocular flutter, with the latter evident when she initiated saccades. Eye movement recordings showed that most of her sac...Flutter
3 Upbeat Nystagmus & Ocular Flutter Due to Cerebellar Pilocytic AstrocytomaThis is a 20-year-old woman who was diagnosed with a cerebellar pilocytic astrocytoma at age 10 after presenting with severe headaches and hydrocephalus. She underwent incomplete resection and radiation therapy at that time. She experienced mild vertical oscillopsia in upgaze at baseline, and increa...Upbeat Nystagmus; Ocular Flutter
4 Voluntary Ocular FlutterThis is a 45-yo-man with intermittent complaints of horizontal oscillopsia for 1 year. On examination, all classes of eye movements were normal, and neurologic examination was normal. MRI of the brain had been performed previously and was normal. During the exam while viewing any target close to his...Abnormal Convergence; Flutter; Voluntary Nystagmus; Voluntary ocular flutter
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