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TitleDescriptionSubject
1 Periodic Alternating Nystagmus Due to Nodulus StrokeThis is a 70-year-old woman who experienced the acute onset of vertigo and imbalance. MRI demonstrated a diffusion-weighted imaging hyperintensity involving the nodulus (with corresponding ADC hypointensity) consistent with an acute stroke. On examination several weeks after the stroke, periodic alt...Periodic Alternating Nystagmus; Jerk Nystagmus
2 Periodic Alternating Nystagmus Due to Nodulus Stroke - Figure 1This is a 70-year-old woman who experienced the acute onset of vertigo and imbalance. MRI demonstrated a diffusion-weighted imaging hyperintensity involving the nodulus (with corresponding ADC hypointensity) consistent with an acute stroke. On examination several weeks after the stroke, periodic alt...Periodic Alternating Nystagmus; Jerk Nystagmus
3 Periodic Alternating Nystagmus and Central Head-Shaking Nystagmus from Nodulus InjuryThis is a 35-year-old man who suffered a gunshot wound to his cerebellum. When he regained consciousness days later, he experienced oscillopsia due to periodic alternating nystagmus (PAN). He was started on baclofen 10 mg bid, and had a dramatic response and only had moderate spontaneous left-beatin...Jerk Nystagmus; Gaze-Evoked Nystagmus; Abnormal Headshake; Periodic Alternating Nystagmus
4 Periodic Alternating Nystagmus due to Spinocerebellar Ataxia Type 6This 50-yo-man complained of imbalance for several years and more recently oscillopsia. On examination, there was saccadic pursuit and VOR suppression in addition to gaze-evoked nystagmus with rebound, raising suspicion for a vestibulocerebellar localization. Additionally, there was periodic alterna...Cerebellar; Jerk nystagmus; Periodic alternating nystagmus; Gaze evoked nystagmus; Rebound nystagmus
5 Periodic alternating nystagmus and perverted head-shaking nystagmus in cerebellar degenerationThis is a 60-yo-woman with several years of worsening imbalance, diplopia (hers was actually unrelated to cerebellar pathology [although she did have an esotropia greater at distance that was cerebellar in origin] and due to thyroid eye disease) and blurry vision (due to her spontaneous nystagmus). ...Headshaking, Cerebellar, Jerk Nystagmus, Periodic Alternating Nystagmus
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