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Related Experiment Videos

Mobile phones modulate response patterns of human brain activity

C Eulitz1, P Ullsperger, G Freude

  • 1Department of Psychology, University of Konstanz, Germany.

Neuroreport
|November 27, 1998
PubMed
Summary

Mobile phones emit pulsed high-frequency electromagnetic fields (PEMF) that affect brain activity. PEMF exposure alters induced brain responses to sounds, particularly during focused attention, suggesting a way to modulate neural activity.

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Area of Science:

  • Neuroscience
  • Electromagnetic field interactions

Background:

  • Mobile phones emit pulsed high-frequency electromagnetic fields (PEMF).
  • Growing interest in PEMF's interaction with the human brain.
  • PEMF may penetrate the scalp and skull, reaching brain tissue.

Purpose of the Study:

  • To investigate how PEMF affects the brain's electrical response to acoustic stimuli.
  • To differentiate effects on induced versus evoked brain activity.

Main Methods:

  • Exposure of subjects to PEMF.
  • Measurement of brain's electrical response to acoustic stimuli (both induced and evoked activity).
  • Analysis of brain activity in different frequency bands during task-relevant and irrelevant stimuli processing.

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Main Results:

  • PEMF exposure altered specific aspects of induced brain activity, not evoked activity.
  • These alterations were observed in higher frequency bands.
  • The effect was present when processing task-relevant stimuli, but not irrelevant stimuli.

Conclusions:

  • PEMF can modify induced brain activity patterns.
  • This modulation is frequency-dependent and stimulus-specific.
  • PEMF may offer a method to systematically alter neural mass activity patterns.