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

Zhurnal evoliutsionnoi biokhimii i fiziologii · 1991 · Harm · Very low evidence

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HarmVery low evidencePaper 6272

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 hy…

Study snapshot

PublicationZhurnal evoliutsionnoi biokhimii i fiziologii · 1991

Study typeanimal

Reported directionHarm

Evidence ratingVery low

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.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeanimal

Effect directionharm

Populationchick embryos (19th day of incubation)

Sample sizeNot supplied

Exposuremicrowave · 2.375 MHz · exposed at 19th day of incubation; assessed 1 day after exposure

Evidence strengthVery lowConfidence: 66% · Peer reviewed: yes

Main findings

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

View raw extracted JSON

{
  "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": 0.66,
  "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": 0.9,
      "reason": "Study reports microwave exposure effects on neuronal activity in chick embryos."
    }
  ]
}

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

Identifiers and source

DOI: Not supplied
PubMed: 1767610

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