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交流电场下神经元适应性的两种放电机制对比分析

DOI: 10.3969/j.issn.1005-3026.2014.09.004, PP. 1229-1233

Keywords: 放电频率适应性,交流外电场,积分效电神经元模型,LIFAC和LIFDT放电机制,相关性

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Abstract:

研究了两种神经元模型放电频率适应性的机制,对比分析了不同机制之间的差异,基于线性积分放电(LIF)神经元模型,建立了在交流外电场作用下LIFAC和LIFDT两种改进的LIF适应性模型.通过分析不同机制模型的初始和稳态放电频率曲线,发现LIFAC机制的放电频率曲线向高输入方向水平右移,且保持斜率不变,LIFDT机制的放电频率曲线呈发散状,斜率递减.在固定频率的交流外电场作用下,稳态放电频率曲线呈线性.另外通过对噪声下放电峰峰间期的相关性和变异性分析,进一步阐明外电场对不同机制适应性的影响.

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