Human brain wave activity during exposure to radiofrequency field emissions from mobile phones.

Australasian physical & engineering sciences in medicine · 2003 · Harm · Low evidence

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HarmLow evidencePaper 3709

Study snapshot

PublicationAustralasian physical & engineering sciences in medicine · 2003

Study typerandomized_trial

Reported directionHarm

Evidence ratingLow

Abstract

The aim of this study was to determine whether there is an effect of mobile phone electromagnetic field emissions on the human electroencephalograph (EEG). EEG recordings from ten awake subjects were taken during exposure to radiofrequency (RF) emissions from a mobile phone positioned behind the head. Two experimental trials were conducted. In the first trial, RF exposures were generated by a GSM mobile phone with the speaker disabled and configured to transmit at full-radiated power. During the second trial, exposures were generated by a non-modified GSM mobile phone in active standby mode. For each trial, subjects were exposed in five minute intervals to a randomized, interrupted sequence of five active and five sham exposures. The experiment was conducted under single-blind conditions. The average EEG band power in active exposure recordings was compared to corresponding sham recordings. Statistical tests indicated significant difference in the full-power mode trial within the EEG alpha (8-13 Hz) and beta (13-32 Hz) bands. A subsequent statistical analysis of median spectral power in discrete EEG rhythms revealed significant differences in 7 of the 32 distinct frequencies overall. In conclusion, the results of this study lend support to EEG effects from mobile phones activated in talk-mode.

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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 typerandomized_trial

Effect directionharm

Populationten awake subjects

Sample size10

ExposureRF · five minute intervals; randomized interrupted sequence of five active and five sham exposures (per trial)

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

In the full-radiated power (talk-mode) GSM trial, statistical tests found significant differences between active and sham exposure in EEG alpha and beta band power. Analysis of median spectral power across discrete EEG rhythms found significant differences in 7 of 32 distinct frequencies overall; the authors conclude the results support EEG effects from mobile phones activated in talk-mode.

Outcomes measured

EEG band power (alpha 8–13 Hz, beta 13–32 Hz)
Median spectral power in discrete EEG rhythms/frequencies

Limitations

Small sample size (n=10)
Single-blind design
Exposure frequency and SAR not reported in abstract
Short exposure intervals (5 minutes)

View raw extracted JSON

{
  "study_type": "randomized_trial",
  "exposure": {
    "band": "RF",
    "source": "mobile phone",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "five minute intervals; randomized interrupted sequence of five active and five sham exposures (per trial)"
  },
  "population": "ten awake subjects",
  "sample_size": 10,
  "outcomes": [
    "EEG band power (alpha 8–13 Hz, beta 13–32 Hz)",
    "Median spectral power in discrete EEG rhythms/frequencies"
  ],
  "main_findings": "In the full-radiated power (talk-mode) GSM trial, statistical tests found significant differences between active and sham exposure in EEG alpha and beta band power. Analysis of median spectral power across discrete EEG rhythms found significant differences in 7 of 32 distinct frequencies overall; the authors conclude the results support EEG effects from mobile phones activated in talk-mode.",
  "effect_direction": "harm",
  "limitations": [
    "Small sample size (n=10)",
    "Single-blind design",
    "Exposure frequency and SAR not reported in abstract",
    "Short exposure intervals (5 minutes)"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "EEG",
    "electroencephalograph",
    "radiofrequency",
    "RF",
    "GSM",
    "mobile phone",
    "talk-mode",
    "active standby",
    "sham exposure",
    "alpha band",
    "beta band"
  ],
  "suggested_hubs": [
    {
      "slug": "mobile-phones",
      "weight": 0.95,
      "reason": "Study tests EEG changes during GSM mobile phone RF exposure with sham control."
    }
  ]
}

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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: 10.1007/bf03179176
PubMed: 14995060

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