減衰型方向交代性上向性眼振例の検討

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概要

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• We report herein on 5 cases of the transient type of apogeotropic direction-changing positional nystagmus. The pathophysiological mechanism behind this disorder is thought to be a canalolithiasis with the debris within the anterior part of the horizontal semicircular canal of an affected ear. In our cases, however, a transformation from an apogeotropic direction-changing positional nystagmus into a geotropic one was not observed before nystagmus completely disappeared. We therefore speculate that the free floating otoconia was located in the ampulla region on the utricle (vestibular) side. Therefore, rolling (yaw rotation) and FPP (Forced Prolonged Position) are considered to be an effective maneuver.

著者

• 晝間 清

  Tokyo Metropolitan Komagome Hospital

• 渡部 涼子

  Tokyo Metropolitan Komagome Hospital

関連論文

• 減衰型方向交代性上向性眼振例の検討

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