Frequency-specific responses in the human brain caused by electromagnetic fields.

PAPER pubmed Journal of the neurological sciences 1994 Other Effect: mixed Evidence: Low

Read original paper → DOI: 10.1016/0022-510x(94)90199-6 PMID: 8064317 Evidence Lab

Abstract

The effects of 1.5- and 10-Hz electromagnetic fields (EMFs), 0.2-0.4 gauss, on the intrinsic electrical activity of the human brain at these frequencies was studied. Each of 19 subjects exposed for 2-sec epochs exhibited altered brain electrical activity at the frequency of the EMF during the time of stimulation, as determined by spectral analysis of the electroencephalogram. Since brain activity at specific frequencies could be altered by applied EMFs, the results suggest that it may be possible to use EMFs to determine whether particular intrinsic frequencies subserve specific physiological or behavioral responses.

AI evidence extraction

At a glance

Study type

Other

Effect direction

mixed

Population

19 human subjects

Sample size

Exposure

ELF · 2-sec epochs

Evidence strength

Low

Confidence: 74% · Peer-reviewed: yes

Main findings

In 19 subjects exposed to 1.5- and 10-Hz EMFs (0.2–0.4 gauss) in 2-second epochs, spectral analysis of EEG indicated altered brain electrical activity at the frequency of the applied EMF during stimulation.

Outcomes measured

Electroencephalogram (EEG) spectral activity at 1.5 Hz and 10 Hz during EMF stimulation

Limitations

Exposure duration was limited to 2-second epochs
No information provided on control/sham condition or blinding in the abstract
Small sample size (n=19)
Outcomes limited to EEG spectral changes during stimulation; no physiological or behavioral outcomes reported

Suggested hubs

who-icnirp (0.2)
Study concerns human responses to low-frequency EMF exposure, potentially relevant to exposure guideline discussions.

View raw extracted JSON

{
    "study_type": "other",
    "exposure": {
        "band": "ELF",
        "source": null,
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": "2-sec epochs"
    },
    "population": "19 human subjects",
    "sample_size": 19,
    "outcomes": [
        "Electroencephalogram (EEG) spectral activity at 1.5 Hz and 10 Hz during EMF stimulation"
    ],
    "main_findings": "In 19 subjects exposed to 1.5- and 10-Hz EMFs (0.2–0.4 gauss) in 2-second epochs, spectral analysis of EEG indicated altered brain electrical activity at the frequency of the applied EMF during stimulation.",
    "effect_direction": "mixed",
    "limitations": [
        "Exposure duration was limited to 2-second epochs",
        "No information provided on control/sham condition or blinding in the abstract",
        "Small sample size (n=19)",
        "Outcomes limited to EEG spectral changes during stimulation; no physiological or behavioral outcomes reported"
    ],
    "evidence_strength": "low",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "ELF electromagnetic fields",
        "1.5 Hz",
        "10 Hz",
        "0.2-0.4 gauss",
        "EEG",
        "spectral analysis",
        "brain electrical activity",
        "frequency-specific response"
    ],
    "suggested_hubs": [
        {
            "slug": "who-icnirp",
            "weight": 0.200000000000000011102230246251565404236316680908203125,
            "reason": "Study concerns human responses to low-frequency EMF exposure, potentially relevant to exposure guideline discussions."
        }
    ]
}

AI can be wrong. Always verify against the paper.

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

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