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Investigation of EEG changes during exposure to extremely low-frequency magnetic field to conduct brain signals.

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Shafiei SA, Firoozabadi SM, Tabatabaie KR, Ghabaee M. · 2014

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Exposing different parts of the brain to extremely low-frequency magnetic fields produced significant changes in EEG power spectrum bands.

Plain English Summary

Summary written for general audiences

Researchers investigated how extremely low-frequency magnetic fields (ELF-MFs) applied to different parts of the brain changed EEG power spectrum readings. EEG relative power spectrum was evaluated at several brain points when exposed to magnetic fields at 45, 17, 10, 5, and 3 Hz frequencies, at intensities of 0, 100, 240, or 360 μT across four sessions. Significant changes were observed in different EEG bands, and some exposures decreased the alpha band in frontal and central areas in the closed-eyes state.

Why This Matters

The study measured EEG power at specific scalp locations, including T4, T3, F3, F4, and Cz, while applying magnetic fields at multiple frequencies and intensities. The researchers also looked at whether effects followed a regular pattern as the intensity of the magnetic field increased. The stated aim included extracting protocols that might be used for treatment of some psychological disorders, though the authors noted clinical evaluation would still be needed.

Exposure Details

Magnetic Field
0, 0.1, 0.24, 0.36 mT
Source/Device
3, 5, 10, 17, and 45 Hz

Exposure Context

This study used 0, 0.1, 0.24, 0.36 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, 0.1, 0.24, 0.36 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 investigate changes in EEG power spectrum due to localized exposure in different parts of the brain by extremely low-frequency magnetic fields (ELF-MFs) to extract some protocols for treatment of some psychological disorders.

In addition, regular effects were investigated by increasing intensity of ELF-MF. Therefore, EEG rel...

Significant changes were observed in different EEG bands caused by locally exposing to ELF-MF in dif...

Based on the findings in this study, some protocols can be designed using a combination of various MFs exposures to conduct the brain signals that is necessary to evaluate clinically.

Cite This Study
Shafiei SA, Firoozabadi SM, Tabatabaie KR, Ghabaee M. (2014). Investigation of EEG changes during exposure to extremely low-frequency magnetic field to conduct brain signals. Neurological Sciences volume 35, pages1715–1721(2014).
Show BibTeX
@article{sa_2014_investigation_of_eeg_changes_299,
  author = {Shafiei SA and Firoozabadi SM and Tabatabaie KR and Ghabaee M.},
  title = {Investigation of EEG changes during exposure to extremely low-frequency magnetic field to conduct brain signals.},
  year = {2014},
  doi = {10.1007/s10072-014-1819-0},
  url = {https://link.springer.com/article/10.1007/s10072-014-1819-0},
}
DOI: 10.1007/s10072-014-1819-0

Cited By (15 papers)

View all 15 citing papers on Semantic Scholar

Quick Questions About This Study

Significant changes were observed in different EEG bands, and some exposures decreased the alpha band in frontal and central areas in the closed-eyes state.
Magnetic fields of 45, 17, 10, 5, and 3 Hz were tested at intensities of 0, 100, 240, or 360 μT across four sessions.
The aim was to investigate EEG power spectrum changes from localized brain exposure to ELF-MFs in order to extract protocols for potential treatment of some psychological disorders.
The authors suggested protocols could be designed from combined exposures, but stated that clinical evaluation would still be necessary.