Electromagnetic exposure effects the hippocampal dentate cell proliferation in gerbils (Meriones unguiculatus).

{
  "study_type": "animal",
  "exposure": {
    "band": "ELF",
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "30 min/day for 14 days; high frequency 35.53 kHz field double-modulated at ELF (1, 8, 12, 29, 50 Hz)"
  },
  "population": "Young adult gerbils (Meriones unguiculatus)",
  "sample_size": null,
  "outcomes": [
    "Hippocampal neurogenesis / dentate granule cell proliferation (BrdU labeling)"
  ],
  "main_findings": "After 14 days of exposure, dentate granule cell proliferation was significantly reduced in the 1, 29, and 50 Hz groups, with the 50 Hz group showing a highly significant reduction (-29.3%). No significant change was observed in the 8 and 12 Hz groups compared with sham controls.",
  "effect_direction": "mixed",
  "limitations": [
    "Sample size not reported in abstract",
    "Exposure metrics such as field strength and SAR not reported",
    "Animal study; generalizability to humans unclear",
    "Mechanistic interpretation (neurotransmitters/hormones) is suggested but not directly demonstrated in the abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "gerbil",
    "hippocampus",
    "dentate gyrus",
    "neurogenesis",
    "cell proliferation",
    "BrdU",
    "electromagnetic field",
    "ELF modulation",
    "35.53 kHz",
    "1 Hz",
    "8 Hz",
    "12 Hz",
    "29 Hz",
    "50 Hz"
  ],
  "suggested_hubs": [
    {
      "slug": "elf-emf",
      "weight": 0.9,
      "reason": "Study examines effects of extremely low frequency (1–50 Hz) modulation on hippocampal cell proliferation in an animal model."
    }
  ]
}