抑制性突触输入作用下神经振子群相响应同步

Phase-response synchronization in population of neuronal oscillators with inhibitory synaptic input

文章利用相响应曲线建立了具有兴奋性与抑制性突触输入和外部周期刺激的神经振子集群模型,引入复序参数描述神经元集群的同步活动。数值模拟表明抑制性突触输入降低了神经元集群的同步程度,减弱了神经元集群同步模式改变时的外部刺激;在弱刺激或低频率刺激下,神经元集群出现完全同步;在强刺激或高频率刺激下,神经元集群出现阵发性同步。

In this paper,the phase description of the neuronal oscillator with excitatory-inhibitory synaptic inputs and external periodic stimulus is formulated by using the phase-response curves.The order parameter is used to describe the synchronized activity of the population of neuronal oscillators.Results of numerical simulation show that inhibitory synaptic input reduces the synchronized degree of neuronal population and external stimulation when the synchronized activity of neuronal population changes.With weaker or lower frequency stimulation,neuronal population shows complete synchronization.With stronger or higher frequency stimulation,neuronal population shows bursting synchronization.