Conditions of application of repeated transcranial magnetic stimulation to rats may mask the effects of the treatment.

{
  "study_type": "animal",
  "exposure": {
    "band": null,
    "source": "repeated transcranial magnetic stimulation (rTMS)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "5 min for 12 consecutive days"
  },
  "population": "Rats",
  "sample_size": null,
  "outcomes": [
    "Body weight gain",
    "Exploratory locomotor activity",
    "Motor response to apomorphine",
    "Apomorphine stereotypy"
  ],
  "main_findings": "Sham rTMS rats exposed to environmental conditions (noisy room and transient immobilization) showed similar inhibition of body weight gain, increased exploratory locomotor activity, and elevated motor response to apomorphine as rats receiving magnetic brain stimulation, with only slightly lower apomorphine stereotypy. The authors suggest that some responses attributed to antidepressant effects of rTMS in animal experiments may be due to environmental conditions rather than the alternating magnetic field.",
  "effect_direction": "mixed",
  "limitations": [
    "Sample size not reported in abstract",
    "Exposure parameters (e.g., field strength, frequency) not reported in abstract",
    "Findings emphasize potential confounding by environmental conditions in sham vs stimulation procedures"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "rTMS",
    "transcranial magnetic stimulation",
    "sham",
    "rats",
    "environmental conditions",
    "immobilization",
    "noise",
    "apomorphine",
    "locomotor activity",
    "body weight"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.2,
      "reason": "Involves repeated exposure to magnetic stimulation procedures, but not clearly occupational; included only weakly."
    }
  ]
}