[The effect of microwaves on the neuronal activity of the hyperstriatum in chick embryos at the critical developmental period].

Abstract

Studies have been made on multineuronal activity in the dorsal hyperstriatum of chick embryos exposed to microwave radiation (2.375 MHz) at critical stage of development of the structure (19th day of incubation). One day after microwave exposition, activation of neurones was observed in a form of the increase in the discharge frequency and the increase of outburst form of the activity. Cyclic form of outburst activity was absent in experimental animals being present in control embryos of the same age and associated presumably with self-organization of microsystems of neurones in the developing brain. Changes in multineuronal activity were found only in the left hyperstriatum, which is probably due to different levels of the development and functional activity of the right and left hyperstriatum at this stage resulting from asymmetric intensity of visual afferentation which depends on the position of embryo inside the egg.

AI evidence extraction

Main findings

One day after microwave exposure, neuronal activation was observed as increased discharge frequency and increased outburst-form activity. Cyclic outburst activity was absent in exposed embryos but present in controls; changes were reported only in the left hyperstriatum.

Outcomes measured

• multineuronal activity in dorsal hyperstriatum
• neuronal discharge frequency
• outburst (burst) activity pattern
• presence/absence of cyclic outburst activity
• left vs right hyperstriatum differences

Limitations

• Sample size not reported in abstract
• Exposure metrics beyond frequency (e.g., power density/SAR) not reported
• Timing/duration of exposure not specified beyond developmental stage and assessment time
• Mechanistic explanation is described as presumptive

Suggested hubs

• animal-studies (0.9)
  Study reports microwave exposure effects on neuronal activity in chick embryos.

{
    "study_type": "animal",
    "exposure": {
        "band": "microwave",
        "source": null,
        "frequency_mhz": 2.375,
        "sar_wkg": null,
        "duration": "exposed at 19th day of incubation; assessed 1 day after exposure"
    },
    "population": "chick embryos (19th day of incubation)",
    "sample_size": null,
    "outcomes": [
        "multineuronal activity in dorsal hyperstriatum",
        "neuronal discharge frequency",
        "outburst (burst) activity pattern",
        "presence/absence of cyclic outburst activity",
        "left vs right hyperstriatum differences"
    ],
    "main_findings": "One day after microwave exposure, neuronal activation was observed as increased discharge frequency and increased outburst-form activity. Cyclic outburst activity was absent in exposed embryos but present in controls; changes were reported only in the left hyperstriatum.",
    "effect_direction": "harm",
    "limitations": [
        "Sample size not reported in abstract",
        "Exposure metrics beyond frequency (e.g., power density/SAR) not reported",
        "Timing/duration of exposure not specified beyond developmental stage and assessment time",
        "Mechanistic explanation is described as presumptive"
    ],
    "evidence_strength": "very_low",
    "confidence": 0.66000000000000003108624468950438313186168670654296875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "microwave radiation",
        "2.375 MHz",
        "chick embryo",
        "hyperstriatum",
        "neuronal activity",
        "developmental period",
        "burst activity",
        "lateralization"
    ],
    "suggested_hubs": [
        {
            "slug": "animal-studies",
            "weight": 0.90000000000000002220446049250313080847263336181640625,
            "reason": "Study reports microwave exposure effects on neuronal activity in chick embryos."
        }
    ]
}

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