性格の生物学的基礎

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Character is a problem of great concern not only in the field of psychiatry but in general medicine. These are many difinitions about character and it has been used interchangeably with personality. Among the studies on biological roots of character, genetic studies have been done with special reference to twin studies. Kretschmer's contribution to the study on physique and character is well known. The author his co-workers have done several studies concerning the correlation between character and cerebral electrial activity in healthy young adults. Frequency analyses of the EEG revealed that EEG had some correlation with character. The distinct activity appears, of which frequency is approx 6-7 Hz and voltage is 20-50μV, at frontal midline area, during performing Kraepeline's test. This θ activity has been called midline fontal theta (Fm θ). From our study, it was found that those subjects who showed low score in the Manifest Anxiety Scale (MAS), high score in the extrovertive scale of Maudsley Personality Inventory (MPI), and low score in the neurotic scale of MPI were apt to show high percentage of Fm θ. On the contrary, those who showed high score in the anxiety scale of MAS, low score in the extrovertive scale of MPI, and high score in the neurotic scale of MPI were apt to show low percentage of Fm θ or no appearance of it. Next, in subjecting 14 healthy university students, to partial differential rapid eye movement (REM) sleep deprivation (PDRD), the compensatory rebound of REM sleep during the next night was determined and showed fairly substantial individual differences in the increased percentage of REM sleep time. This study revealed that individuals who were extrovertive, active, optimistic, showy, and who had many fields had signficantly higher increases in the percantage of REM time than the individuals who were introvertive, neurotic, inactive, nervous, modest, and who had few friends.
日本心身医学会の論文
1978-02-01

性格の生物学的基礎

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