A Route to Chaotic Behavior of Single Neuron Exposed to External Electromagnetic Radiation.

Abstract

Non-linear behaviors of a single neuron described by Fitzhugh-Nagumo (FHN) neuron model, with external electromagnetic radiation considered, is investigated. It is discovered that with external electromagnetic radiation in form of a cosine function, the mode selection of membrane potential occurs among periodic, quasi-periodic, and chaotic motions as increasing the frequency of external transmembrane current, which is selected as a sinusoidal function. When the frequency is small or large enough, periodic, and quasi-periodic motions are captured alternatively. Otherwise, when frequency is in interval 0.778 < ω < 2.208, chaotic motion characterizes the main behavior type. The mechanism of mode transition from quasi-periodic to chaotic motion is also observed when varying the amplitude of external electromagnetic radiation. The frequency apparently plays a more important role in determining the system behavior.

AI evidence extraction

Main findings

External electromagnetic radiation modeled as a cosine function induces mode transitions in membrane potential of a single neuron model, including periodic, quasi-periodic, and chaotic behaviors depending on the frequency and amplitude of the radiation. Frequency plays a key role in determining the behavior, with chaotic motion occurring in a specific frequency interval.

Outcomes measured

• membrane potential behavior modes
• periodic motion
• quasi-periodic motion
• chaotic motion

Limitations

• study is computational modeling, not experimental or epidemiological
• single neuron model may not represent complex biological systems
• no direct health or functional outcomes assessed

{
    "study_type": "in_vitro",
    "exposure": {
        "band": null,
        "source": "external electromagnetic radiation",
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": null
    },
    "population": "single neuron model (Fitzhugh-Nagumo)",
    "sample_size": null,
    "outcomes": [
        "membrane potential behavior modes",
        "periodic motion",
        "quasi-periodic motion",
        "chaotic motion"
    ],
    "main_findings": "External electromagnetic radiation modeled as a cosine function induces mode transitions in membrane potential of a single neuron model, including periodic, quasi-periodic, and chaotic behaviors depending on the frequency and amplitude of the radiation. Frequency plays a key role in determining the behavior, with chaotic motion occurring in a specific frequency interval.",
    "effect_direction": "unclear",
    "limitations": [
        "study is computational modeling, not experimental or epidemiological",
        "single neuron model may not represent complex biological systems",
        "no direct health or functional outcomes assessed"
    ],
    "evidence_strength": "low",
    "confidence": 0.299999999999999988897769753748434595763683319091796875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "electromagnetic radiation",
        "neuron model",
        "Fitzhugh-Nagumo",
        "chaotic behavior",
        "membrane potential",
        "non-linear dynamics"
    ],
    "suggested_hubs": []
}

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