頭位・頭位変換眼振の経時的変化について

DOI 被引用文献5件 参考文献9件

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  • Vestibular Findings of Periodically Changing Positional and Positioning Nystagmus.

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Three cases of periodically changing positional and positioning nystagmus are reported. All of the cases showed unremarkable findings on the neurological tests and a brain MRI. However, they all presented with peculiar types of positional and positioning nystagmus. The majority showed a direction-changing geotropic nystagmus and a down-beating nystagmus. The direction and type of the nystagmus changed frequently. The direction changing geotropic type often altered into the apogeotropic type, or the direction changing nystagmus was observed to be mixed with a downbeating nystagmus. Since no space occupying lesions were observed, a vascular disorder within the brain stem or cerebellum was suspected. The above findings support the importance of a nystagmus test, even when the MRI findings are unremarkable.

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