Evaluating the Effect of Jammer Radiation on Learning and Memory in Male Rats

2023 · Mixed · Low evidence

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MixedLow evidencePaper 569

Study snapshot

Publicationmanual · 2023

Study typeanimal

Reported directionMixed

Evidence ratingLow

Abstract

Evaluating the Effect of Jammer Radiation on Learning and Memory in Male Rats Yazdanpanahi M, Namazi A, Shojaeifard MB, Nematolahi S, Pourahmad S. Evaluating the Effect of Jammer Radiation on Learning and Memory in Male Rats. J Biomed Phys Eng. 2023 Feb 1;13(1):29-38. doi: 10.31661/jbpe.v0i0.2001-1049. Abstract Background: Previous studies shown that mobile phone can impairment of working memory in humans. Objective: In this study, the effect of radiofrequency radiation emitted from common mobile jammers have been studied on the learning and memory of rats. Material and methods: In this prospective study, 90 Sprague-Dawley rats, were divided into 9 groups (N=10): Control, Sham1st (exposed to a switched-off mobile jammer device at a distance of 50 or 100 cm/1 day, 2 hours), Sham2nd (similar to Sham1st, but for 14 days, 2 h/day), Experimental1st -50 cm/1 day &100 cm/1 day (exposed to a switched-on device at a distance of 50 or 100 cm for 2 hours), Experimental2nd (similar to experimental1st, but for 14 days, 2 h/day). The animals were tested for learning and memory the next day, by the shuttle box. The time that a rat took to enter the dark part was considered as memory. Results: Mean short-term memory was shorter in the experimental- 50 cm/1 day than control and sham- 50 cm/1 day (P=0.034), long-term memory was similar. Mean short- and long-term memory were similar in the experimental- 100 cm/1 day, control and sham- 100 cm/1 day (P>0.05). Mean short-term memory was similar in experimental- 50 cm/14 days, control, and sham- 50 cm/14 days (P=0.087), but long-term learning memory was shorter in the radiated group (P=0.038). Mean short- and long-term were similar among experimental-100 cm/14 days, control or sham 100 cm/14 days (P>0.05). Conclusion: Rats exposed to jammer device showed dysfunction in short- and long-term memory, which shown the unfavorable effect of jammer on memory and learning. Our results indicated that the distance from radiation source was more important than the duration. Excerpt: The mobile jammer used in this study was an MB06-Mobile blocker, designed for 4-four different frequencies, including code division multiple access, digital cellular service, global system for mobile (GSM) communication, and third-generation which blocks the following frequencies: 850, 900, and 1800 MHz. The shielding radius was indicated to be 0-40 m on the jammer device. Open access paper: ncbi.nlm.nih.gov

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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 directionmixed

PopulationMale Sprague-Dawley rats

Sample size90

ExposureRF · Single exposure (1 day, 2 h) or repeated exposure (14 days, 2 h/day); distance 50 cm or 100 cm

Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

Compared with control/sham, short-term memory was shorter after 1-day exposure at 50 cm (P=0.034), while long-term memory was similar. After 14-day exposure at 50 cm, long-term learning memory was shorter in the radiated group (P=0.038) while short-term memory was similar (P=0.087). At 100 cm, short- and long-term memory were similar to control/sham for both 1-day and 14-day exposures (P>0.05).

Outcomes measured

Learning and memory (shuttle box; latency to enter dark compartment as memory measure)
Short-term memory
Long-term memory

Limitations

No SAR or field strength/exposure level reported in the abstract
Frequency details are described generally (jammer designed for multiple bands), but specific emitted frequencies during exposure are not quantified in the abstract
Outcome description is limited to shuttle-box latency; broader cognitive domains not assessed in the abstract

View raw extracted JSON

{
  "study_type": "animal",
  "exposure": {
    "band": "RF",
    "source": "mobile jammer",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "Single exposure (1 day, 2 h) or repeated exposure (14 days, 2 h/day); distance 50 cm or 100 cm"
  },
  "population": "Male Sprague-Dawley rats",
  "sample_size": 90,
  "outcomes": [
    "Learning and memory (shuttle box; latency to enter dark compartment as memory measure)",
    "Short-term memory",
    "Long-term memory"
  ],
  "main_findings": "Compared with control/sham, short-term memory was shorter after 1-day exposure at 50 cm (P=0.034), while long-term memory was similar. After 14-day exposure at 50 cm, long-term learning memory was shorter in the radiated group (P=0.038) while short-term memory was similar (P=0.087). At 100 cm, short- and long-term memory were similar to control/sham for both 1-day and 14-day exposures (P>0.05).",
  "effect_direction": "mixed",
  "limitations": [
    "No SAR or field strength/exposure level reported in the abstract",
    "Frequency details are described generally (jammer designed for multiple bands), but specific emitted frequencies during exposure are not quantified in the abstract",
    "Outcome description is limited to shuttle-box latency; broader cognitive domains not assessed in the abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "radiofrequency radiation",
    "mobile jammer",
    "jammer radiation",
    "rats",
    "Sprague-Dawley",
    "learning",
    "memory",
    "shuttle box",
    "GSM",
    "850 MHz",
    "900 MHz",
    "1800 MHz"
  ],
  "suggested_hubs": [
    {
      "slug": "rf-animal-studies",
      "weight": 0.9,
      "reason": "Animal experiment assessing RF exposure effects on learning/memory."
    },
    {
      "slug": "mobile-phones-rf",
      "weight": 0.35,
      "reason": "Exposure source is a mobile jammer operating in cellular-related frequency bands (e.g., GSM-related)."
    }
  ]
}

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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: 10.31661/jbpe.v0i0.2001-1049
PubMed: Not supplied

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