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A Quantitative Electroencephalographic Study on Psychotropic Effects of Mianserin Yukiyoshi Yamamoto 1 , Toshiaki Isotani 1 , Yoshiyasu Okajima 1 , Akemi Saito 1 , Yoshiharu Honda 1 , Yoshitake Minami 1 , Yasuji Fukui 1 , Masami Saito 1 1Department of Neuropsychiatry, Kansai Medical University Keyword: Mianserin , EEG , Cluster analysis , Antidepressant pp.345-353
Published Date 1988/3/15
DOI https://doi.org/10.11477/mf.1405204492
  • Abstract
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 For the purpose of studying clinical effects of mianserin, an antidepressant of the second generation, the authors carried out a quantitative EEG study. Six healthy male volunteers were orally given a single dose of mianserin 10mg and 20mg in crossover design and EEGs at 1, 3, and 6 hours after the administration were analyzed with zerocross periodgram method, and the induced EEG changes were compared with those due to other antidepressants in our database using cluster analysis.

 The obtained results were as follows: EEG changes induced by 10mg of mianserin was of psychostimulant-type with some traits of thymoleptic-type, which indicates its clinical effects are mainly on psychoactivating. While 20mg of mianserin induced typical thymoleptic-type EEG changes similar to 25mg of amitriptyline indicating that it has clinically a mood-elevating action with a certain anti-anxiety effets.

 In cluster analysis both the two doses of mianserin, especially 10mg of them, showed a difference from the other antidepressants and in particular 20mg of them was clustered separately from low dosage of other antidepressants. The results suggest that mianserin possesses unique antidepressant effects.


Copyright © 1988, 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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