8,700 Studies Reviewed. 87.0% Found Biological Effects. The Evidence is Clear.
Shield Your Body
Brain & Nervous System151 citations

The influence of electromagnetic fields on human brain activity.

Bioeffects Seen

Reiser H, Dimpfel W, Schober F · 1995

View Original Abstract
Share:

Both medical EMF devices and mobile phones measurably altered human brain wave patterns, with phone effects persisting 15 minutes after exposure ended.

Plain English Summary

Summary written for general audiences

Researchers exposed 36 volunteers to electromagnetic fields from both a medical therapy device and a mobile phone, then measured their brain activity using EEG recordings. Both EMF sources caused measurable changes in brain wave patterns, with the therapy device affecting brain activity immediately and the mobile phone causing delayed effects about 15 minutes after exposure. This demonstrates that electromagnetic fields can directly alter human brain function in ways that persist even after the exposure ends.

Why This Matters

This 1995 study provides early evidence that EMF exposure can measurably alter human brain activity patterns. What makes this research particularly significant is that it used proper scientific controls and found consistent effects from two different EMF sources. The delayed response to mobile phone exposure is especially noteworthy, suggesting that EMF effects on the brain don't just occur during exposure but can persist and even emerge after the field is turned off. While the study doesn't specify exact exposure levels, the fact that both a medical device and an early digital mobile phone produced similar brain wave changes indicates this is a reproducible biological response. The reality is that if EMF can alter brain activity patterns in controlled laboratory conditions, we should take seriously the possibility that our daily EMF exposures from phones, WiFi, and other wireless devices may be affecting our neurological function in ways we're only beginning to understand.

Exposure Information

Specific exposure levels were not quantified in this study.

Study Details

Possible effects of electromagnetic fields on human brain activity were studied.

In a single-blind, cross-over-designed and placebo-controlled study 36 volunteers were exposed firs...

Application of the MEGA-WAVE instrument caused an increase in EEG power in the frequency bands Alpha...

Cite This Study
Reiser H, Dimpfel W, Schober F (1995). The influence of electromagnetic fields on human brain activity. Eur J Med Res 1(1):27-32, 1995.
Show BibTeX
@article{h_1995_the_influence_of_electromagnetic_2535,
  author = {Reiser H and Dimpfel W and Schober F},
  title = {The influence of electromagnetic fields on human brain activity.},
  year = {1995},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/9392690/},
}
PubMed: 9392690

Cited By (151 papers)

View all 151 citing papers on Semantic Scholar

Quick Questions About This Study

Yes, research shows electromagnetic therapy devices can immediately alter brain wave patterns. A 1995 study found that EMF exposure from a medical therapy device increased brain activity in Alpha2, Beta1, and Beta2 frequency bands during and after treatment, demonstrating measurable changes in brain function.
Research indicates cell phones can cause delayed brain wave changes that appear 15 minutes after use. A study measuring EEG activity found that mobile phone operation increased brain wave power in specific frequency bands, with effects occurring well after the phone was turned off.
EMF effects on brain activity can persist after exposure ends, according to EEG research. Both medical therapy devices and mobile phones caused brain wave changes that continued beyond the actual exposure period, with mobile phones showing delayed effects appearing 15 minutes later.
EMF exposure specifically affects Alpha2, Beta1, and Beta2 brain wave frequencies. Research using EEG recordings found that both electromagnetic therapy devices and mobile phones increased power in these same frequency bands, indicating consistent patterns of brain wave alteration across different EMF sources.
Yes, EEG recordings can detect measurable changes in brain activity from EMF exposure. A controlled study of 36 volunteers demonstrated that electromagnetic fields from both medical devices and mobile phones produced distinct alterations in brain wave patterns that were clearly visible on EEG measurements.