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Horizontal Canal Benign Paroxysmal Positional Vertigo (HC-BPPV) with Direction-changing Apogeotropic Nystagmus:A Case with the More-trig-gering Side Altering over a Short Term Shigetoshi Takaya 1,2 , Toru Yamamoto 2 1Department of Neurology, Osaka Saiseikai Nakatsu Hospital 2Department of Brain Imaging, Human Brain Research Center, Graduate School of Medicine, Kyoto University Keyword: direction-changing apogeotropic nystagmus , horizontal canal benign paroxysmal positional vertigo , cupulolithiasis , mechanism pp.321-325
Published Date 2002/4/1
DOI https://doi.org/10.11477/mf.1406902124
  • Abstract
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We report a 44-year-old man who had apogeotropic nystagmus with the rotation of his head to either side from the supine position. His nystagmus lasted more than 2 minutes and was difficult to treat with. There were no neurological abnormalities except for the nys-tagmus and no findings suggesting intracranial dis-ease on MRI. The head-position in which more in-tense nystagmus was evoked changed again and again in a short term. We diagnosed his illness as cupu-lolithiasis of horizontal canal, however, the affected ear could not be explained by any of the previously supposed mechanisms.


Copyright © 2002, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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