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A Pharmaco-ERP Study of the Effects of Cerebral-metabolic Enhancers in Demented Patients Tsukasa Sasaki 1 , Ken-Ichi Hiramatsu 2 , Masato Fukuda 2 , Osamu Saitoh 3 , Fumio Etoh 4 , Setsu Iijima 5 , Tamaki Mizoguchi 5 , Seiki Hayashida 6,7 , Kenji Itoh 8 , Shin-Ichi Niwa 2 1Neuropsychiatric Research Institute, Seiwa Hospital 2Department of Neuropsychiatry, Faculty of Medicine, University of Tokyo 3National Center Hospital for Mental, Nervous and Muscular Disorders, National Center of Neurology and Psychiatry 4Central Rehabilitation Service, Faculty of Medicine, University of Tokyo 5Department of Geriatrics, Faculty of Medicine, University of Tokyo 6Post-graduate Course of Literature, Nihon University 7Research Institute of Medical Engineering, Faculty of Medicine, University of Tokyo 8Research Institute of Logopedics and Phoniatrics, Faculty of Medicine, University of Tokyo Keyword: Event-related potential , ERP , Cerebral-metabolic enhancers , Demented patients , Oddball paradigm , 3-tone paradigm pp.259-268
Published Date 1991/3/15
DOI https://doi.org/10.11477/mf.1405904912
  • Abstract
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 To evaluate the effects of cerebral-metabolic enhancers we recorded auditory event-related potentials (ERPs) during oddball and 3-tone paradigms along with MMS (Mini Mental State) in 8 demented patients before and 8 weeks after administration of idebenone (90mg/day) or calcium hopantenate (1.5g/day). After administration of the drugs, P300 amplitudes were increased in both paradigms. However P300 latencies were shortened only in the 3-tone paradigm with reaction times being shortened only in the oddball paradigm. MMS scores showed no significant change after the administration. The increase in P300 amplitudes was more marked after administration of calcium hopantenate as compared to idebenone. The decrease in P300 latencies was more remarkable after administration of idebenone than after the use of calcium hopantenate. These findings suggest that measurements of ERPs provide sensitive indices for the effects of cerebral-metabolic enhancers and that employment of fairly sophisticated tasks rather than simpler tasks yield deeper insights into the effects of cerebral-metabolic enhancers on the improvement of cognitive functioning.


Copyright © 1991, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-126X 印刷版ISSN 0488-1281 医学書院

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