加算作業による誘発EEGとMVの変化

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The purpose of this study was to analize various psychological conditions at pre, during and at post situations of Kraepplin tests by physiological measurements of Electroencephalogram (EEG), evoked EEG (slow vertex response: SVR), and Microvibration (MV). Those bio-signals were analized to compare psychological changes with frequency bands of EEG, lag time and P-P amplitude of SVR, and power spectra and total power of MV. As the mental stressor of this experiment, Kraepplin's adding calcurational tasks were adopted to healthy eight subjects (male, mean ages: 36 years) for fifteen minutes at experimental room. EEG signals were recorded from head center point (Cz), and evoked EEG (SVR) were measured by Neuro-pack apparatus used with auditory stimulus (80〜90dB and 1/2Hz, punching noises). Also MV sensor were used to collect Microvibration signals from the eyelid during these tasks. Following items were resulted relating between this stress tests and physiological signals. 1) Calcurational tasks did not depend on various frequency bands of EEG and MV of physiological signals. Then, those tasks should not have any effect on psycho-physiological conditions of mental stress. 2) After those stress tasks, much difference between each peak to peak amplitude of SVR waves decreased with remarkably ratio significantly (P<0.01). Then this Kraepplin test should be estimated to attack the mental field of central nervous system of subjects. 3) Integrated total power of MV spectra have changed significantly according to each elapsed stage of this stress task, while that tatal power of EEG spectra did not change non-significantly, among those mental bands of culculational tasks (P>0.05). 4) In future of such a stress experiment, this evoked EEG (SVR) would be applied for human to detect physical changes of the mental stress quantitatively.
早稲田大学の論文
1990-03-25

加算作業による誘発EEGとMVの変化

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