Study of nonionizing microwave radiation effects upon the central nervous system and behavior reactions.

PAPER pubmed Environmental health perspectives 1979 Animal study Effect: mixed Evidence: Low

Read original paper → DOI: 10.1289/ehp.7930115 PMID: 446442 Evidence Lab

Abstract

The biologic effect of an electromagnetic field of a frequency of 2375 +/- 50 MHz was studied in rats and rabbits in specially constructed absorbant chambers. The results of the investigations have shown that microwave radiation of 10, 50, 500 mu W/cm2 for 30 days, 7 hr/day, causes a number of changes in bioelectric brain activity and also in behavioral immunological, and cytochemical reactions. It was found that levels of 10 and 50 mu W/cm2 stimulate the electric brain activity at the initial stage of irradiation, while a level of 500 mu W/cm2 causes its suppression, as seen from the increase of slow, high amplitude delta-waves. At 500 mu W/cm2 a decrease in capacity of work, in value of unconditioned feeding stimulus, in investigating activity, electronic irradiation threshold, and in inhibition of cellular and humoral immunity were also observed.

AI evidence extraction

At a glance

Study type

Animal study

Effect direction

mixed

Population

Rats and rabbits

Sample size

—

Exposure

microwave · 2375 MHz · 30 days, 7 hr/day

Evidence strength

Low

Confidence: 74% · Peer-reviewed: yes

Main findings

In rats and rabbits exposed to 2375 ± 50 MHz in absorbent chambers, microwave radiation at 10, 50, and 500 µW/cm2 for 30 days (7 hr/day) was reported to cause changes in bioelectric brain activity and behavioral, immunological, and cytochemical reactions. At 10 and 50 µW/cm2, electric brain activity was reported to be stimulated initially, while at 500 µW/cm2 it was reported to be suppressed (increase in slow, high-amplitude delta waves) along with decreased work capacity and other behavioral measures and inhibition of cellular and humoral immunity.

Outcomes measured

Bioelectric brain activity (EEG)
Behavioral reactions (work capacity, feeding stimulus, investigating activity)
Electronic irradiation threshold
Cellular and humoral immunity
Cytochemical reactions

Limitations

Sample size not reported in abstract
No SAR or dosimetry details beyond power density provided in abstract
Details of study design (randomization/blinding/control conditions) not described in abstract
Outcome measurement methods and statistical results not provided in abstract

View raw extracted JSON

{
    "study_type": "animal",
    "exposure": {
        "band": "microwave",
        "source": null,
        "frequency_mhz": 2375,
        "sar_wkg": null,
        "duration": "30 days, 7 hr/day"
    },
    "population": "Rats and rabbits",
    "sample_size": null,
    "outcomes": [
        "Bioelectric brain activity (EEG)",
        "Behavioral reactions (work capacity, feeding stimulus, investigating activity)",
        "Electronic irradiation threshold",
        "Cellular and humoral immunity",
        "Cytochemical reactions"
    ],
    "main_findings": "In rats and rabbits exposed to 2375 ± 50 MHz in absorbent chambers, microwave radiation at 10, 50, and 500 µW/cm2 for 30 days (7 hr/day) was reported to cause changes in bioelectric brain activity and behavioral, immunological, and cytochemical reactions. At 10 and 50 µW/cm2, electric brain activity was reported to be stimulated initially, while at 500 µW/cm2 it was reported to be suppressed (increase in slow, high-amplitude delta waves) along with decreased work capacity and other behavioral measures and inhibition of cellular and humoral immunity.",
    "effect_direction": "mixed",
    "limitations": [
        "Sample size not reported in abstract",
        "No SAR or dosimetry details beyond power density provided in abstract",
        "Details of study design (randomization/blinding/control conditions) not described in abstract",
        "Outcome measurement methods and statistical results not provided in abstract"
    ],
    "evidence_strength": "low",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "microwave radiation",
        "nonionizing radiation",
        "2375 MHz",
        "rats",
        "rabbits",
        "EEG",
        "behavior",
        "immunity",
        "power density",
        "delta waves"
    ],
    "suggested_hubs": []
}

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.

Comments

No comments yet.