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不同刺激模式對神經(jīng)傳導(dǎo)阻斷影響的仿真研究

Simulation of myelinated nerve conduction block induced byelectrical stimulus pulses superimposed with different modes

作者: 劉斌  張旭  任朝暉  錢柏霖  朱亞光  左銳 
單位:首都醫(yī)科大學(xué)臨床生物力學(xué)應(yīng)用基礎(chǔ)研究北京市重點實驗室(北京100069)
關(guān)鍵詞: 詞方波;正弦波;傳導(dǎo)阻滯;閾值;高斯白噪聲 
分類號:R318.04
出版年·卷·期(頁碼):2017·36·2(118-122)
摘要:

目的 為減少長期電刺激導(dǎo)致的神經(jīng)疲勞,提高治療效率,本研究比較多種刺激模式在神經(jīng)傳導(dǎo)阻斷中的阻斷閾值,為動物實驗選擇最好的刺激模式。方法 以有限長單根有髓神經(jīng)為研究對象,采用有髓神經(jīng)纖維Frankenhaeuser-Huxley(F-H)模型進行仿真,比較雙向?qū)ΨQ方波、正弦波、雙向?qū)ΨQ方波簇的阻斷閾值以及疊加不同信噪比的雙向?qū)ΨQ方波阻斷閾值。結(jié)果 在刺激頻率范圍內(nèi),對稱方波的阻斷波形低于正弦波和方波簇的刺激阻斷閾值。對于疊加噪聲的對稱方波,疊加-50dB的高斯白噪聲能夠降低方波的阻斷閾值。結(jié)論 方波的阻斷閾值低于正弦波和方波簇。在相同的條件下,疊加高斯白噪聲對方波阻斷閾值的影響明顯,尤其是疊加-50dB的噪聲。

Objective In order to reduce the nerve fatigue caused by long-term electrical stimulation and improve the treatment efficiency, this study compares the blocking threshold of a variety of stimulation modes in nerve conduction block, and chooses the best stimulation mode for animal experiments.Methods We used the myelinated nerve fiber with limited length as the research object, and the Frankenhaeuser-Huxley (F-H) model for mammal’s marrow nerve fiber as the basic system.We simulated the symmetrical biphasic pulses, sinusoidal pulses, intermittent biphasic pulse clusters and symmetrical biphasic pulses superimposed with different SNR noise to compare the block threshold.Results In the simulation, the symmetrical biphasic pulse wave had a lower blocking threshold than sinusoidal pulses and biphasic pulse cluster.The symmetrical square wave superimposed -50dB of white Gaussian noise could reduce the blocking threshold.Conclusions In the same conditions, the blocking threshold of symmetry biphasic pulses is lower than the others, and the effect of the symmetrical biphasic pulses superimposed with -50dB noise has a lower blocking threshold.

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