Effect of 450 MHz Microwave Modulated with 217 Hz on Human EEG in Rest

Maie Bachmann (), Maksim Säkki, Jaan Kalda, Jaanus Lass, Viiu Tuulik and Hiie Hinrikus
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Maie Bachmann: Tallinn University of Technology
Maksim Säkki: Tallinn University of Technology
Jaan Kalda: Tallinn University of Technology
Jaanus Lass: Tallinn University of Technology
Viiu Tuulik: Tallinn University of Technology
Hiie Hinrikus: Tallinn University of Technology

Environment Systems and Decisions, 2005, vol. 25, issue 2, 165-171

Abstract: Summary This study focuses on discrimination of changes, produced by low-level microwave exposure in intensity and time variability of the human EEG at rest. The power spectral density (PSD) method and nonlinear scaling analysis of the length distribution of low variability periods (LDLVP) were selected for analysis of the EEG signal. During the study, 19 healthy volunteers were exposed to a microwave (450 MHz) of 217 Hz frequency on-off modulation. The field power density at the scalp was 0.16 mW/cm2. The experimental protocol consisted of ten cycles of repetitive microwave exposure. Signals from frontal, temporal, parietal and occipital EEG channels on EEG theta, alpha and beta rhythms were analysed. Exposure to microwave causes average increase of EEG activity. LDLVP analysis discriminated significant effect in time variability for 2 subjects (11%). PSD method detected significant changes in intensity for 4 subjects (21%). The effect of low-level microwave exposure is stronger on EEG beta rhythm in temporal and parietal regions of the human brain.

Keywords: EMF effects; nonionising radiation; microwave radiation; time variability; scaling analysis; spectral analysis; EEG rhythms (search for similar items in EconPapers)
Date: 2005
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DOI: 10.1007/s10669-005-4279-5

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