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1 A 'Canal Jam' During Head Impulse Testing in a Patient With Horizontal Canal BPPVA 70-year-old man reported brief episodes of positional vertigo. Ten years prior, he had undergone gamma knife radiosurgery for a vestibular schwannoma at the left cerebellopontine angle. Video head impulse testing (vHIT) showed reduced gains and corrective saccades in the planes of the left horizon...Image/MovingImage
2 Bruns Nystagmus (During Video-Oculography) Due to Vestibular SchwannomaA 25-year-old man with a history of right-sided hearing loss, headaches and imbalance was found to have a right vestibular schwannoma on MRI, and underwent a partial resection and radiotherapy. He denied symptoms of head movement dependent oscillopsia (i.e., suggestive of significant unilateral or b...Image/MovingImage
3 Gaze-Evoked, Rebound, and Centripetal Nystagmus in Cerebellar DegenerationA 68-year-old female reported a 2-year history of progressive gait imbalance, falls, dizziness and vertical oscillopsia. She described that dizziness and oscillopsia were worst when looking down. There was no family history of ataxia. Composite gaze with fixation was recorded with video-oculography ...Image/MovingImage
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