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Sferics provoke changes in EEG power.

A Schienle1, R Stark, D Vaitl

  • 1Department of Clinical and Physiological Psychology, Justus-Liebig-University, Otto-Behagel-Strasse 10, 35394 Giessen, Germany. anne.schienle@psychol.uni-giessen.de

The International Journal of Neuroscience
|May 1, 2001
PubMed
Summary
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This study found that exposure to Very Low Frequency (VLF) sferics increased electroencephalogram (EEG) alpha and beta power in female subjects. These electrocortical changes persisted after the sferics exposure concluded.

Area of Science:

  • Neuroscience
  • Environmental Science

Background:

  • Investigates the impact of Very Low Frequency (VLF) sferics on human electrocortical activity and psychological state.
  • Examines the potential for VLF sferics to influence brainwave patterns and subjective experiences.

Purpose of the Study:

  • To determine the electrocortical and psychological effects of VLF sferics exposure.
  • To analyze changes in electroencephalogram (EEG) power spectra and subjective states following VLF sferics stimulation.

Main Methods:

  • Eighty female subjects were divided into an experimental group exposed to 10 kHz sferics and a control group.
  • EEG was recorded using Fast Fourier Transform (FFT) analysis at specific electrode sites (P3/P4; O1/O2).
  • Subjects' emotional, somatic states, and conscious perception of sferics were assessed.

Related Experiment Videos

Main Results:

  • The sferics group showed increased EEG alpha and beta power, peaking 20 minutes post-exposure.
  • The control group exhibited a slight reduction in EEG power.
  • No significant effects on subjective state or conscious perception of sferics were observed.

Conclusions:

  • VLF sferics exposure can induce measurable changes in electrocortical activity, specifically increasing alpha and beta EEG power.
  • These electrocortical effects demonstrate a delayed onset and prolonged duration after the cessation of VLF sferics exposure.
  • VLF sferics do not appear to influence conscious perception or subjective emotional/somatic states in the studied population.