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Study of the frequency parameters of EEG influenced by zone-dependent local ELF-MF exposure on the human head.

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Shafiei SA, Firoozabadi SM, Rasoulzadeh Tabatabaie K, Ghabaee M. · 2012

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Exposing different parts of the human brain to local extremely low-frequency magnetic fields produced significant changes in EEG bands, not necessarily limited to the exposure point.

Plain English Summary

Summary written for general audiences

Researchers exposed different parts of the brain to extremely low-frequency magnetic fields locally and investigated EEG power spectrum changes at the frequency of stimulation. EEG relative power spectrum was evaluated at 3, 5, 10, 17, and 45 Hz frequencies at T4, T3, F3, Cz, and F4 points, when those points were exposed to magnetic fields at similar frequencies and 100 μT intensity. EEG power did not change significantly at the frequency of stimulation, but significant changes were observed in different EEG bands.

Why This Matters

The study targeted five specific points on the human head, including T4, T3, F3, Cz, and F4, each exposed to a magnetic field matched to a particular frequency. Although the EEG power at the exact stimulation frequency did not change significantly, other EEG frequency bands did show significant changes. The changes in EEG bands were not limited necessarily to the exposure point.

Exposure Details

Magnetic Field
0.1 mT
Source/Device
3, 5, 10, 17, and 45 Hz

Exposure Context

This study used 0.1 mT for magnetic fields:

Building Biology guidelines are practitioner-based limits from real-world assessments. BioInitiative Report recommendations are based on peer-reviewed science. Check Your Exposure to compare your own measurements.

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 0.1 mTExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the Extreme Concern range (Building Biology)FCC limit is 2 times higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 45 Hz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 45 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Study Details

The aim of the present study was to expose different parts of the brain to extremely low-frequency magnetic fields locally and investigate EEG power spectrum alters at the frequency of stimulation.

EEG relative power spectrum were evaluated at 3, 5, 10, 17, and 45 Hz frequencies at T4, T3, F3, Cz,...

The paired t-test results showed that power value of EEG did not alter significantly at the frequenc...

Cite This Study
Shafiei SA, Firoozabadi SM, Rasoulzadeh Tabatabaie K, Ghabaee M. (2012). Study of the frequency parameters of EEG influenced by zone-dependent local ELF-MF exposure on the human head. Electromagn Biol Med. 31(2):112-12, 2012.
Show BibTeX
@article{sa_2012_study_of_the_frequency_298,
  author = {Shafiei SA and Firoozabadi SM and Rasoulzadeh Tabatabaie K and Ghabaee M.},
  title = {Study of the frequency parameters of EEG influenced by zone-dependent local ELF-MF exposure on the human head.},
  year = {2012},
  doi = {10.3109/15368378.2011.624658},
  url = {https://www.tandfonline.com/doi/abs/10.3109/15368378.2011.624658},
}
DOI: 10.3109/15368378.2011.624658

Cited By (19 papers)

Quick Questions About This Study

The brain points were exposed to magnetic fields at 100 μT intensity.
EEG power did not alter significantly at the frequency of stimulation.
The changes in EEG bands were not limited necessarily to the exposure point.
Exposures were applied at 3, 5, 10, 17, and 45 Hz at points T4, T3, F3, Cz, and F4 respectively.
Significant changes in different EEG bands were observed when different points of the brain were locally exposed to ELF-MF.