微秒脈沖電刺激對神經(jīng)元動作電位發(fā)放影響的仿真研究
發(fā)布時間:2019-06-01 07:31
【摘要】:為研究微秒脈沖電刺激對神經(jīng)元動作電位發(fā)放特性的影響,結(jié)合笛卡爾傳輸網(wǎng)格和HH神經(jīng)元等效電路模型建立3維神經(jīng)元傳輸網(wǎng)格系統(tǒng)模型。在此基礎(chǔ)上,仿真研究了刺激強度I改變而刺激脈寬τ不變、刺激τ改變而I不變、以及刺激劑量(I~2_τ)不變而強度I與脈寬τ均改變3種刺激方案下各參數(shù)分別對神經(jīng)元動作電位發(fā)放特性的影響。研究結(jié)果表明:3種方案均存在刺激閾值,分別為25 n A、90.79μs;5.968 29 n A、400μs;112.52 n A、19.746μs。刺激參數(shù)大于閾值,神經(jīng)元產(chǎn)生興奮且可有效傳遞。沿軸突z方向(除刺激點)各處動作電位峰值隨刺激參數(shù)增大基本不變,僅時延變長。刺激點處動作電位峰值與刺激參數(shù)大小正相關(guān),但脈寬增大時其存在最大峰值。刺激參數(shù)小于閾值,神經(jīng)元無法產(chǎn)生興奮,沿軸突z方向各處動作電位峰值與刺激參數(shù)大小正相關(guān)?紤]作用效益和技術(shù)發(fā)展現(xiàn)狀,可綜合選取出最優(yōu)參數(shù)。研究結(jié)果可為后續(xù)實驗甚或臨床研究提供刺激參數(shù)選取的理論依據(jù),對進一步的機理研究具有一定的參考價值。
[Abstract]:In order to study the effect of microsecond pulse electrical stimulation on the action potential emission characteristics of neurons, a 3D neuron transmission grid system model was established based on Cartesian transmission grid and HH neuron equivalent circuit model. On this basis, it is simulated that the stimulation intensity I changes and the stimulation pulse width tau does not change, and the stimulation tau changes and I does not change. And the effects of stimulation dose (I 鈮,
本文編號:2490094
[Abstract]:In order to study the effect of microsecond pulse electrical stimulation on the action potential emission characteristics of neurons, a 3D neuron transmission grid system model was established based on Cartesian transmission grid and HH neuron equivalent circuit model. On this basis, it is simulated that the stimulation intensity I changes and the stimulation pulse width tau does not change, and the stimulation tau changes and I does not change. And the effects of stimulation dose (I 鈮,
本文編號:2490094
本文鏈接:http://sikaile.net/xiyixuelunwen/2490094.html
最近更新
教材專著