Electromagnetic field stimulation for long-term mobility assessment after sciatic nerve injury.

Neurological research · 2025 · Benefit · Low evidence

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BenefitLow evidencePaper 5905

In a rat sciatic nerve injury model, EMF-treated groups (low- and high-intensity) showed improved TS and FAS mobility-related scores compared with injured controls over 4 weeks. Histology indicated inflammation in controls, while EMF-treated groups showed dim…

Study snapshot

PublicationNeurological research · 2025

Study typeanimal

Reported directionBenefit

Evidence ratingLow

Abstract

INTRODUCTION: Gauss (G) or miliTesla (mT) units measure electromagnetic field (EMF) stimulation. Tarlov Scale (TS) assesses motor impairment, Finger Abduction Scale (FAS) measures finger separation. The objective is to evaluate mobility using EMF in a Sciatic Nerve Injury (SNI) model. MATERIALS & METHODS: SNI caused paresis in the right hind limb to observe motor changes in male Sprague-Dawley rats (372-529 g) ( = 30). Three groups of ( = 10) rats were created. Control Group (CG) was just injured. The experimental groups were EMF-treated two hours a day for four weeks (2/24, 5/7, 4/4), applying Gauss intensities: Low-Intensity (LIMF) 60-100 (6-10 mT) & High-Intensity (HIMF) 140-200 (14-20 mT). The mobility was measured each week with TS & FAS. Sciatic nerve & skeletal muscle histological slides were made with traditional staining technique to evaluate cellular inflammation. We used two-tailed repeated ANOVA measures & Bonferroni tests, with a significance < 0.05 (α = 0.05) and β = 80%. RESULTS: EMFs effectively treat SNI in rats, improving the mobility of the right hind limb in experimental groups. In the last week, TS scores were CG 3.5 (±1.35) = 0.006, LIMF 4 (±0) = 0.0001 & HIMF 4.3 (±0.82) = 0.02. FAS scores were CG 0.2 (±0.42) = 0.000001, LIMF 1.5 (±0.70) = 0.05 & HIMF 1.8 (±0.42) = 0.1. In histological findings, CG had inflammation in nerve & muscle, LIMF & HIMF diminished cellular activity. DISCUSSION: TS & FAS helped to improve mobility in experimental groups using EMFs after SNI. The nerve repairing mechanism should be studied in future models.

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AI evidence extraction

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Study typeanimal

Effect directionbenefit

PopulationMale Sprague-Dawley rats with sciatic nerve injury model

Sample size30

Exposure2 hours/day for 4 weeks

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Outcomes measured

Mobility/motor impairment (Tarlov Scale, TS)
Finger separation (Finger Abduction Scale, FAS)
Histological inflammation/cellular activity in sciatic nerve and skeletal muscle

Limitations

Animal model; findings may not generalize to humans
EMF frequency and waveform not reported in abstract
No sham-exposure group described (control was injured only)
Short follow-up duration (4 weeks)

View raw extracted JSON

{
  "study_type": "animal",
  "exposure": {
    "band": null,
    "source": "electromagnetic field stimulation (experimental treatment)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "2 hours/day for 4 weeks"
  },
  "population": "Male Sprague-Dawley rats with sciatic nerve injury model",
  "sample_size": 30,
  "outcomes": [
    "Mobility/motor impairment (Tarlov Scale, TS)",
    "Finger separation (Finger Abduction Scale, FAS)",
    "Histological inflammation/cellular activity in sciatic nerve and skeletal muscle"
  ],
  "main_findings": "In a rat sciatic nerve injury model, EMF-treated groups (low- and high-intensity) showed improved TS and FAS mobility-related scores compared with injured controls over 4 weeks. Histology indicated inflammation in controls, while EMF-treated groups showed diminished cellular activity/inflammation in nerve and muscle.",
  "effect_direction": "benefit",
  "limitations": [
    "Animal model; findings may not generalize to humans",
    "EMF frequency and waveform not reported in abstract",
    "No sham-exposure group described (control was injured only)",
    "Short follow-up duration (4 weeks)"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electromagnetic field stimulation",
    "EMF",
    "Gauss",
    "milliTesla",
    "sciatic nerve injury",
    "Sprague-Dawley rats",
    "Tarlov Scale",
    "Finger Abduction Scale",
    "mobility",
    "inflammation",
    "histology"
  ],
  "suggested_hubs": []
}

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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: 10.1080/01616412.2025.2504715
PubMed: 40351253

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