Long-Term Evolution Electromagnetic Fields Exposure Modulates the Resting State EEG on Alpha and Beta Bands.

Abstract

Long-term evolution (LTE) wireless telecommunication systems are widely used globally, which has raised a concern that exposure to electromagnetic fields (EMF) emitted from LTE devices can change human neural function. To date, few studies have been conducted on the effect of exposure to LTE EMF. Here, we evaluated the changes in electroencephalogram (EEG) due to LTE EMF exposure. An LTE EMF exposure system with a stable power emission, which was equivalent to the maximum emission from an LTE mobile phone, was used to radiate the subjects. Numerical simulations were conducted to ensure that the specific absorption rate in the subject's head was below the safety limits. Exposure to LTE EMF reduced the spectral power and the interhemispheric coherence in the alpha and beta bands of the frontal and temporal brain regions. No significant change was observed in the spectral power and the inter-hemispheric coherence in different timeslots during and after the exposure. These findings also corroborated those of our previous study using functional magnetic resonant imaging.

AI evidence extraction

Main findings

Using an LTE EMF exposure system equivalent to the maximum emission from an LTE mobile phone (with simulations indicating head SAR below safety limits), exposure reduced EEG spectral power and interhemispheric coherence in alpha and beta bands in frontal and temporal regions. No significant changes were observed across different timeslots during and after exposure.

Outcomes measured

• Resting-state EEG spectral power (alpha and beta bands)
• Interhemispheric coherence (alpha and beta bands)

Limitations

• Sample size not reported in abstract
• Exposure frequency, SAR value, and exposure duration not reported in abstract
• Study design details (e.g., randomization, blinding, sham control) not described in abstract

Suggested hubs

• who-icnirp (0.25)
  Mentions SAR below safety limits, relevant to exposure guideline context.

{
    "study_type": "other",
    "exposure": {
        "band": "RF",
        "source": "mobile phone",
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": null
    },
    "population": "human subjects",
    "sample_size": null,
    "outcomes": [
        "Resting-state EEG spectral power (alpha and beta bands)",
        "Interhemispheric coherence (alpha and beta bands)"
    ],
    "main_findings": "Using an LTE EMF exposure system equivalent to the maximum emission from an LTE mobile phone (with simulations indicating head SAR below safety limits), exposure reduced EEG spectral power and interhemispheric coherence in alpha and beta bands in frontal and temporal regions. No significant changes were observed across different timeslots during and after exposure.",
    "effect_direction": "harm",
    "limitations": [
        "Sample size not reported in abstract",
        "Exposure frequency, SAR value, and exposure duration not reported in abstract",
        "Study design details (e.g., randomization, blinding, sham control) not described in abstract"
    ],
    "evidence_strength": "low",
    "confidence": 0.66000000000000003108624468950438313186168670654296875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "LTE",
        "electromagnetic fields",
        "RF exposure",
        "mobile phone",
        "EEG",
        "resting state",
        "alpha band",
        "beta band",
        "spectral power",
        "interhemispheric coherence"
    ],
    "suggested_hubs": [
        {
            "slug": "who-icnirp",
            "weight": 0.25,
            "reason": "Mentions SAR below safety limits, relevant to exposure guideline context."
        }
    ]
}

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