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

Author

Listed:
  • 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)

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.

Suggested Citation

  • Maie Bachmann & Maksim Säkki & Jaan Kalda & Jaanus Lass & Viiu Tuulik & Hiie Hinrikus, 2005. "Effect of 450 MHz Microwave Modulated with 217 Hz on Human EEG in Rest," Environment Systems and Decisions, Springer, vol. 25(2), pages 165-171, December.
    • Handle: RePEc:spr:envsyd:v:25:y:2005:i:2:d:10.1007_s10669-005-4279-5
    DOI: 10.1007/s10669-005-4279-5
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    References listed on IDEAS

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    1. Säkki, M & Kalda, J & Vainu, M & Laan, M, 2004. "The distribution of low-variability periods in human heartbeat dynamics," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 338(1), pages 255-260.
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    Cited by:

    1. Maie Bachmann & Hiie Hinrikus & Kaire Aadamsoo & Ülle Võhma & Jaanus Lass & Jekaterina Rubljova & Anna Suhhova & Viiu Tuulik, 2007. "Modulated microwave effects on individuals with depressive disorder," Environment Systems and Decisions, Springer, vol. 27(4), pages 505-510, December.
    2. Hiie Hinrikus & Maie Bachmann & Jaanus Lass & Viiu Tuulik, 2009. "Effect of modulated at different low frequencies microwave radiation on human EEG," Environment Systems and Decisions, Springer, vol. 29(2), pages 215-219, June.

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