Frequency-specific electromagnetic modulation of brain redox state precedes cortical activity in stroke recovery

PAPER manual iScience 2026 Other Effect: benefit Evidence: Low

Read original paper → DOI: 10.1016/j.isci.2026.114731 PMID: 42006370 Evidence Lab

Abstract

Mitigating oxidative stress is essential for recovery from stroke and other brain pathologies. Transient modulation of reactive oxygen species production triggers both cellular defense/repair mechanisms and neuroplasticity. Extremely low-frequency, low-intensity electromagnetic field (ELF-EMF) exposure may achieve both non-invasively. Here, we explored longitudinal consequences of frequency-specific ELF-EMF treatment on oxidative stress and cortical electrical activity in mice, and the implications for stroke recovery in humans. In mice, chronic (4w), daily 40Hz ELF-EMF (3h) exposure was neuroprotective across brain regions, as reflected in glutathione oxidation state. Notably, this followed an initial redox burden at treatment onset that was also detectable peripherally (urinary isoprostane, IsoP). Cortical rhythms emerged only gradually after chronic treatment. Enhanced EEG beta (13-30 Hz) power correlated with initial IsoP levels in mice and the degree of stroke recovery in humans. Taken together, ELF-EMF induces a sequential redox state dynamic that drives cortical activity toward functional recovery.

AI evidence extraction

At a glance

Study type

Other

Effect direction

benefit

Population

Mice; humans with stroke recovery implications

Sample size

—

Exposure

ELF other · chronic 4 weeks, daily 3 hours; 40 Hz ELF-EMF

Evidence strength

Low

Confidence: 77% · Peer-reviewed: yes

Main findings

In mice, chronic daily 40 Hz ELF-EMF exposure over 4 weeks was associated with neuroprotective redox changes across brain regions, reflected in glutathione oxidation state, after an initial redox burden detectable also by urinary isoprostane. Cortical rhythm changes emerged gradually, and enhanced EEG beta power correlated with initial isoprostane levels in mice and with the degree of stroke recovery in humans.

Outcomes measured

glutathione oxidation state
urinary isoprostane (IsoP)
cortical electrical activity
EEG beta power (13-30 Hz)
stroke recovery

Limitations

Sample size not stated in the abstract
Abstract includes both mouse findings and human stroke recovery implications, but the human study design is not specified
Exposure intensity is described as low-intensity but not quantified in the abstract

View raw extracted JSON

{
    "study_type": "other",
    "exposure": {
        "band": "ELF",
        "source": "other",
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": "chronic 4 weeks, daily 3 hours; 40 Hz ELF-EMF"
    },
    "population": "Mice; humans with stroke recovery implications",
    "sample_size": null,
    "outcomes": [
        "glutathione oxidation state",
        "urinary isoprostane (IsoP)",
        "cortical electrical activity",
        "EEG beta power (13-30 Hz)",
        "stroke recovery"
    ],
    "main_findings": "In mice, chronic daily 40 Hz ELF-EMF exposure over 4 weeks was associated with neuroprotective redox changes across brain regions, reflected in glutathione oxidation state, after an initial redox burden detectable also by urinary isoprostane. Cortical rhythm changes emerged gradually, and enhanced EEG beta power correlated with initial isoprostane levels in mice and with the degree of stroke recovery in humans.",
    "effect_direction": "benefit",
    "limitations": [
        "Sample size not stated in the abstract",
        "Abstract includes both mouse findings and human stroke recovery implications, but the human study design is not specified",
        "Exposure intensity is described as low-intensity but not quantified in the abstract"
    ],
    "evidence_strength": "low",
    "confidence": 0.770000000000000017763568394002504646778106689453125,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "ELF-EMF",
        "40 Hz",
        "stroke recovery",
        "oxidative stress",
        "redox state",
        "glutathione",
        "isoprostane",
        "EEG beta power",
        "mice",
        "neuroprotection"
    ],
    "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract/metadata and may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.

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