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Comparison of the EDA and EEG frequency components (qualitative analysis) 839
PhD in Psychology, Associate Professor, Chair of Psychology, International University of Nature, Dubna, Russia
The author recorded galvanic skin response (GSR, Feret method), skin potential (SP, Tarkhanov method) and local frontal encephalogram (Fp1). GSR was recorded with an amplifier bandwidth of 0.05-1 Hz, SP and EEG amplified with biopotential broadband amplifiers in the range 0.05-300 Hz. SP and local EEG signals were processed by the same algorithm. We obtained profiles of SP and EEG containing topologically similar low (LF) and high frequency (HF) components in the range of 0.05-45 Hz. LF-components of SP and EEG in some subjects were identical (in phase) of the GSR, in other subjects they were antiphased, in still others both types were observed. High-frequency components of SP contained rhythms, similar to EEG rhythms (Delta, Theta, Alpha, Beta, Gamma). However, frequency analysis showed that SP rhythms differ from local EEG rhythms in power and frequency distribution. The findings are discussed in the context of the nature of biorhythms.
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