Can Low-Level RF Exposure Affect Cognitive Behaviour in Lab Animals? Literature Review of Spatial Learning and Place Memory

2019 · Mixed · Low evidence

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MixedLow evidencePaper 1816

Study snapshot

Publicationmanual · 2019

Study typesystematic_review

Reported directionMixed

Evidence ratingLow

Abstract

Can Low-Level RF Exposure Affect Cognitive Behaviour in Lab Animals? Literature Review of Spatial Learning and Place Memory Sienkiewicz Z, van Rongen E. Can Low-Level Exposure to Radiofrequency Fields Effect Cognitive Behaviour in Laboratory Animals? A Systematic Review of the Literature Related to Spatial Learning and Place Memory. Int J Environ Res Public Health. 2019 May 8;16(9). pii: E1607. doi: 10.3390/ijerph16091607. Abstract This review considers whether exposure to low-level radiofrequency (RF) fields, mostly associated with mobile phone technology, can influence cognitive behaviour of laboratory animals. Studies were nominated for inclusion using an a priori defined protocol with preselected criteria, and studies were excluded from analysis if they did not include sufficient details about the exposure, dosimetry or experimental protocol, or if they lacked a sham-exposed group. Overall, 62 studies were identified that have investigated the effects of RF fields on spatial memory and place learning and have been published since 1993. Of these, 17 studies were excluded, 20 studies reported no significant field-related effects, 21 studies reported significant impairments or deficits, and four studies reported beneficial consequences. The data do not suggest whether these outcomes are related to specific differences in exposure or testing conditions, or simply represent chance. However, some studies have suggested possible molecular mechanisms for the observed effects, but none of these has been substantiated through independent replication. Further behavioural studies could prove useful to resolve this situation, and it is suggested that these studies should use a consistent animal model with standardized exposure and testing protocols, and with detailed dosimetry provided by heterogeneous, anatomically-realistic animal models. Open access paper: mdpi.com

Machine Enhanced Logic

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 typesystematic_review

Effect directionmixed

PopulationLaboratory animals

Sample size62

ExposureRF

Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

A total of 62 studies on RF exposure and spatial memory/place learning in laboratory animals were identified (published since 1993); 17 were excluded for insufficient exposure/dosimetry/protocol details or lack of a sham group. Among included studies, 20 reported no significant effects, 21 reported significant impairments/deficits, and 4 reported beneficial effects; the review did not identify whether differences in exposure or testing conditions explained these outcomes, and proposed molecular mechanisms were not independently replicated.

Outcomes measured

spatial memory
place learning
cognitive behaviour

Limitations

17 identified studies were excluded due to insufficient exposure/dosimetry/experimental protocol details or lack of a sham-exposed group.
The review reports that the data do not suggest whether differing outcomes relate to exposure/testing differences or chance.
Proposed molecular mechanisms were not substantiated through independent replication.
Need for standardized exposure and testing protocols and detailed dosimetry using heterogeneous, anatomically realistic animal models.

View raw extracted JSON

{
  "study_type": "systematic_review",
  "exposure": {
    "band": "RF",
    "source": "mobile phone",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Laboratory animals",
  "sample_size": 62,
  "outcomes": [
    "spatial memory",
    "place learning",
    "cognitive behaviour"
  ],
  "main_findings": "A total of 62 studies on RF exposure and spatial memory/place learning in laboratory animals were identified (published since 1993); 17 were excluded for insufficient exposure/dosimetry/protocol details or lack of a sham group. Among included studies, 20 reported no significant effects, 21 reported significant impairments/deficits, and 4 reported beneficial effects; the review did not identify whether differences in exposure or testing conditions explained these outcomes, and proposed molecular mechanisms were not independently replicated.",
  "effect_direction": "mixed",
  "limitations": [
    "17 identified studies were excluded due to insufficient exposure/dosimetry/experimental protocol details or lack of a sham-exposed group.",
    "The review reports that the data do not suggest whether differing outcomes relate to exposure/testing differences or chance.",
    "Proposed molecular mechanisms were not substantiated through independent replication.",
    "Need for standardized exposure and testing protocols and detailed dosimetry using heterogeneous, anatomically realistic animal models."
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "radiofrequency",
    "RF exposure",
    "low-level exposure",
    "mobile phone technology",
    "laboratory animals",
    "spatial learning",
    "place memory",
    "spatial memory",
    "dosimetry",
    "sham-exposed"
  ],
  "suggested_hubs": [
    {
      "slug": "mobile-phones",
      "weight": 0.7,
      "reason": "Review focuses on low-level RF fields mostly associated with mobile phone technology."
    }
  ]
}

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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: 10.3390/ijerph16091607
PubMed: Not supplied

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