Comparison between Direct Electrical and Optogenetic Subthalamic Nucleus Stimulation

R. Schoeters, T. Tarnaud, W. Joseph, L. Martens, R. Raedt, E. Tanghe
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引用次数: 4

Abstract

Subthalamic nucleus deep brain stimulation is a treatment for Parkinson’s disease. In this study, a computational model of a plateau-potential generating subthalamic nucleus neuron (Otsuka-model) and a four-state ChR2(H134R) model (Williams-model) are combined, in order to compare electrical and optogenetic neuromodulation capabilities. The impact of the stimulation modality (optogenetic or electric) on firing rates, strength-duration curves and action potential shape is investigated. First, in contrast to electrical stimulation, mean instantaneous firing rates saturate for optical stimulation at intensities higher than 0.1 W/cm2. Second, rheobase and chronaxie are 175% and 9.6% larger in optogenetic stimulation compared to electrical stimulation, respectively. Third, action potential shape is not significantly impacted by the neurostimulation modality.
直接电刺激和光遗传学丘脑下核刺激的比较
丘脑下核深部脑刺激是治疗帕金森病的一种方法。本研究将产生高原电位的丘脑下核神经元计算模型(otsuka模型)与四态ChR2(H134R)模型(williams -模型)相结合,以比较电和光遗传神经调节能力。研究了刺激方式(光电或电)对放电速率、强度-持续时间曲线和动作电位形状的影响。首先,与电刺激相比,当光刺激强度高于0.1 W/cm2时,平均瞬时发射速率达到饱和。其次,光遗传刺激下的流变酶和chronaxie分别比电刺激高175%和9.6%。动作电位形态不受神经刺激方式的显著影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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