[Effect of microwave radiation on regional blood flow and tissue oxygenation in the brain].

PAPER pubmed Biulleten' eksperimental'noi biologii i meditsiny 1984 Animal study Effect: mixed Evidence: Low

Read original paper → PMID: 6466826 Evidence Lab

Abstract

The effect of irradiation of the central nervous system by microwaves (MW) at a frequency of 2450 MHz and power 5-40 W on the regulation of cerebral circulation and oxygen supply to the nervous tissue were studied in rabbits. Local irradiation of the exposed cerebral cortex resulted in hyperemia and hyperoxia in the zone of exposure induced by the hyperthermal effect of MW. When the region of the medulla oblongata was irradiated even with low MW power (not leading to hyperthermia), the local circulation and oxygen tension increased in the whole brain, apparently due to the impairment of the regulation of the cerebral blood flow and oxygen supply to the brain tissue.

AI evidence extraction

At a glance

Study type

Animal study

Effect direction

mixed

Population

Rabbits

Sample size

—

Exposure

microwave localized CNS irradiation · 2450 MHz

Evidence strength

Low

Confidence: 74% · Peer-reviewed: yes

Main findings

In rabbits, local irradiation of exposed cerebral cortex with 2450 MHz microwaves (5–40 W) produced hyperemia and hyperoxia in the exposed zone, attributed to a hyperthermal effect. Irradiation of the medulla oblongata at low power not leading to hyperthermia increased circulation and oxygen tension across the whole brain, reportedly due to impaired regulation of cerebral blood flow and oxygen supply.

Outcomes measured

regional cerebral blood flow
tissue oxygenation/oxygen tension
cerebral circulation regulation
hyperemia
hyperoxia
hyperthermia

Limitations

Sample size not reported in the abstract
Exposure duration not reported
Dosimetry (e.g., SAR) not reported
Details of experimental design and controls not provided in the abstract

Suggested hubs

who-icnirp (0.2)
Microwave exposure with physiological effects; potentially relevant to exposure guideline discussions, though no policy content is provided.

View raw extracted JSON

{
    "study_type": "animal",
    "exposure": {
        "band": "microwave",
        "source": "localized CNS irradiation",
        "frequency_mhz": 2450,
        "sar_wkg": null,
        "duration": null
    },
    "population": "Rabbits",
    "sample_size": null,
    "outcomes": [
        "regional cerebral blood flow",
        "tissue oxygenation/oxygen tension",
        "cerebral circulation regulation",
        "hyperemia",
        "hyperoxia",
        "hyperthermia"
    ],
    "main_findings": "In rabbits, local irradiation of exposed cerebral cortex with 2450 MHz microwaves (5–40 W) produced hyperemia and hyperoxia in the exposed zone, attributed to a hyperthermal effect. Irradiation of the medulla oblongata at low power not leading to hyperthermia increased circulation and oxygen tension across the whole brain, reportedly due to impaired regulation of cerebral blood flow and oxygen supply.",
    "effect_direction": "mixed",
    "limitations": [
        "Sample size not reported in the abstract",
        "Exposure duration not reported",
        "Dosimetry (e.g., SAR) not reported",
        "Details of experimental design and controls not provided in the abstract"
    ],
    "evidence_strength": "low",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "microwave radiation",
        "2450 MHz",
        "rabbit",
        "brain",
        "cerebral blood flow",
        "oxygen tension",
        "hyperemia",
        "hyperoxia",
        "medulla oblongata",
        "hyperthermia"
    ],
    "suggested_hubs": [
        {
            "slug": "who-icnirp",
            "weight": 0.200000000000000011102230246251565404236316680908203125,
            "reason": "Microwave exposure with physiological effects; potentially relevant to exposure guideline discussions, though no policy content is provided."
        }
    ]
}

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.