Preliminary investigations of the effects of low-level microwave radiation on spontaneous motor activity in rats.

PAPER pubmed Annals of the New York Academy of Sciences 1975 Animal study Effect: no_effect Evidence: Low

Read original paper → DOI: 10.1111/j.1749-6632.1975.tb36017.x PMID: 1054244 Evidence Lab

Abstract

Male rats were irradiated with microwaves of 10.7 GHz (cw), 3 GHz (cw), or 3 GHz (pw) for 185 hr with power densities of approximately 1 mW/cm-2. Spontaneous activity was automatically measured and analyzed in five amplitude classes, after irradiation had ceased. No differences were found between the irradiated and the similarly treated nonirradiated control rats. A few rats were exposed for 17 days to 3 GHz (pw) at 25 mW/cm-2. Here, again, the spontaneous motor activity was not affected. Before irradiation, these rats had been trained to constant peak performance in a 2-m long runway. Their running times remained unchanged by this treatment regimen and did not differ from those of nonirradiated control rats. So far, no deleterious effects of the microwave radiation used has been detected.

AI evidence extraction

At a glance

Study type

Animal study

Effect direction

no_effect

Population

Male rats

Sample size

—

Exposure

microwave · 10700 MHz · 185 hr; also 17 days (subset)

Evidence strength

Low

Confidence: 74% · Peer-reviewed: yes

Main findings

Male rats exposed to 10.7 GHz (cw), 3 GHz (cw), or 3 GHz (pw) for 185 hours at ~1 mW/cm^2 showed no differences in post-exposure spontaneous activity compared with nonirradiated controls. A subset exposed to 3 GHz (pw) for 17 days at 25 mW/cm^2 also showed no change in spontaneous activity or runway running times versus controls.

Outcomes measured

Spontaneous motor activity
Runway running time (trained performance)

Limitations

Sample size not reported in abstract
Outcome assessment described only after irradiation had ceased (post-exposure measurement)
Exposure metrics reported as power density; SAR not provided
Details of randomization/blinding and statistical methods not provided in abstract

View raw extracted JSON

{
    "study_type": "animal",
    "exposure": {
        "band": "microwave",
        "source": null,
        "frequency_mhz": 10700,
        "sar_wkg": null,
        "duration": "185 hr; also 17 days (subset)"
    },
    "population": "Male rats",
    "sample_size": null,
    "outcomes": [
        "Spontaneous motor activity",
        "Runway running time (trained performance)"
    ],
    "main_findings": "Male rats exposed to 10.7 GHz (cw), 3 GHz (cw), or 3 GHz (pw) for 185 hours at ~1 mW/cm^2 showed no differences in post-exposure spontaneous activity compared with nonirradiated controls. A subset exposed to 3 GHz (pw) for 17 days at 25 mW/cm^2 also showed no change in spontaneous activity or runway running times versus controls.",
    "effect_direction": "no_effect",
    "limitations": [
        "Sample size not reported in abstract",
        "Outcome assessment described only after irradiation had ceased (post-exposure measurement)",
        "Exposure metrics reported as power density; SAR not provided",
        "Details of randomization/blinding and statistical methods not provided in abstract"
    ],
    "evidence_strength": "low",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "microwave radiation",
        "rats",
        "10.7 GHz",
        "3 GHz",
        "continuous wave",
        "pulsed wave",
        "power density",
        "spontaneous motor activity",
        "runway performance"
    ],
    "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.