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Electromagnetic field exposure (50 Hz) impairs response to noxious heat in American cockroach.

Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2018 · Harm · Low evidence

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HarmLow evidencePaper 5542

Exposure to a 50 Hz, 7 mT electromagnetic field for 24 h, 72 h, and 7 days significantly increased latency to escape from noxious heat. MDA levels increased after 24 h and remained elevated up to 7 days, while glutathione levels declined after 7 days of expos…

Study snapshot

PublicationJournal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2018
Study typeanimal
Reported directionHarm
Evidence ratingLow

Abstract

Exposure to electromagnetic field (EMF) induces physiological changes in organism that are observed at different levels-from biochemical processes to behavior. In this study, we evaluated the effect of EMF exposure (50 Hz, 7 mT) on cockroach's response to noxious heat, measured as the latency to escape from high ambient temperature. We also measured the levels of lipid peroxidation and glutathione content as markers of oxidative balance in cockroaches exposed to EMF. Our results showed that exposure to EMF for 24, 72 h and 7 days significantly increases the latency to escape from noxious heat. Malondialdehyde (MDA) levels increased significantly after 24-h EMF exposure and remained elevated up to 7 days of exposure. Glutathione levels significantly declined in cockroaches exposed to EMF for 7 days. These results demonstrate that EMF exposure is a considerable stress factor that affects oxidative state and heat perception in American cockroach.

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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
PopulationAmerican cockroach
Sample sizeNot supplied
ExposureELF · 0.05 MHz · 24 h, 72 h, and 7 days
Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

Exposure to a 50 Hz, 7 mT electromagnetic field for 24 h, 72 h, and 7 days significantly increased latency to escape from noxious heat. MDA levels increased after 24 h and remained elevated up to 7 days, while glutathione levels declined after 7 days of exposure.

Outcomes measured

  • Latency to escape from noxious heat (response to high ambient temperature)
  • Lipid peroxidation (malondialdehyde, MDA)
  • Glutathione content (oxidative balance marker)

Limitations

  • Sample size not reported in provided abstract/metadata
  • Details of exposure setup and control/sham conditions not described in provided abstract
  • Randomization/blinding and statistical methods not described in provided abstract
View raw extracted JSON
{
  "study_type": "animal",
  "exposure": {
    "band": "ELF",
    "source": null,
    "frequency_mhz": 0.05,
    "sar_wkg": null,
    "duration": "24 h, 72 h, and 7 days"
  },
  "population": "American cockroach",
  "sample_size": null,
  "outcomes": [
    "Latency to escape from noxious heat (response to high ambient temperature)",
    "Lipid peroxidation (malondialdehyde, MDA)",
    "Glutathione content (oxidative balance marker)"
  ],
  "main_findings": "Exposure to a 50 Hz, 7 mT electromagnetic field for 24 h, 72 h, and 7 days significantly increased latency to escape from noxious heat. MDA levels increased after 24 h and remained elevated up to 7 days, while glutathione levels declined after 7 days of exposure.",
  "effect_direction": "harm",
  "limitations": [
    "Sample size not reported in provided abstract/metadata",
    "Details of exposure setup and control/sham conditions not described in provided abstract",
    "Randomization/blinding and statistical methods not described in provided abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "ELF-EMF",
    "50 Hz",
    "7 mT",
    "cockroach",
    "noxious heat",
    "escape latency",
    "oxidative stress",
    "malondialdehyde",
    "glutathione"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.2,
      "reason": "Study involves ELF (50 Hz) magnetic field exposure, which can relate to occupational ELF contexts, though no occupational setting is specified."
    }
  ]
}
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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: 10.1007/s00359-018-1264-2
PubMed: 29721708

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