Microwave radiation has modulation frequency dependent stimulating effect on human EEG rhythms.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference · 2004 · Mixed · Low evidence

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MixedLow evidencePaper 3620

Study snapshot

PublicationConference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference · 2004

Study typeother

Reported directionMixed

Evidence ratingLow

Abstract

This study is focused on low-level modulated microwave field effects on human EEG theta, alpha and beta rhythms at different modulation frequencies. During the experiment 13 healthy volunteers were exposed to a microwave (450 MHz) with 7 Hz, 14 Hz and 21 Hz frequency on-off modulation. The field power density at the scalp was 0.16 mW/cm(2). The experimental protocol consisted of five cycles of the repetitive microwave stimulation at fixed modulation frequencies. Changes in the EEG rhythms energy became evident in the case of modulation frequencies higher than the EEG rhythms frequencies. The changes varied strongly from subject to subject. Microwave exposure caused statistically significant changes in the EEG theta rhythm energy and for occipital channels in the alpha rhythm energy.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeother

Effect directionmixed

Population13 healthy volunteers

Sample size13

Exposuremicrowave · 450 MHz

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Thirteen healthy volunteers were exposed to a 450 MHz microwave field with on-off modulation at 7, 14, and 21 Hz (scalp power density 0.16 mW/cm^2) in five repetitive stimulation cycles. Statistically significant changes were reported in EEG theta rhythm energy and, for occipital channels, in alpha rhythm energy; changes were described as strongly variable between subjects and became evident when modulation frequencies were higher than EEG rhythm frequencies.

Outcomes measured

EEG theta rhythm energy
EEG alpha rhythm energy (occipital channels)
EEG beta rhythm energy

Limitations

Small sample size (n=13)
Results varied strongly between subjects
Exposure duration and other protocol details not specified in the abstract
No SAR reported (only power density at scalp)

View raw extracted JSON

{
  "study_type": "other",
  "exposure": {
    "band": "microwave",
    "source": null,
    "frequency_mhz": 450,
    "sar_wkg": null,
    "duration": null
  },
  "population": "13 healthy volunteers",
  "sample_size": 13,
  "outcomes": [
    "EEG theta rhythm energy",
    "EEG alpha rhythm energy (occipital channels)",
    "EEG beta rhythm energy"
  ],
  "main_findings": "Thirteen healthy volunteers were exposed to a 450 MHz microwave field with on-off modulation at 7, 14, and 21 Hz (scalp power density 0.16 mW/cm^2) in five repetitive stimulation cycles. Statistically significant changes were reported in EEG theta rhythm energy and, for occipital channels, in alpha rhythm energy; changes were described as strongly variable between subjects and became evident when modulation frequencies were higher than EEG rhythm frequencies.",
  "effect_direction": "mixed",
  "limitations": [
    "Small sample size (n=13)",
    "Results varied strongly between subjects",
    "Exposure duration and other protocol details not specified in the abstract",
    "No SAR reported (only power density at scalp)"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "microwave",
    "radiofrequency",
    "450 MHz",
    "modulation frequency",
    "on-off modulation",
    "EEG",
    "theta",
    "alpha",
    "beta",
    "human volunteers"
  ],
  "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1109/iembs.2004.1404178
PubMed: 17271236

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