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arXiv 2103.01790q-bio.NCphysics.bio-ph
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神经元异质性通过兴奋-抑制平衡调节单向耦合群体之间的相位同步

Neuronal heterogeneity modulates phase-synchronization between unidirectionally coupled populations with excitation-inhibition balance

Katiele V. P. Brito, Fernanda Selingardi Matias

摘要:

一些实验和模型强调了神经元异质性在大脑动力学和功能中的重要性。然而,这种细胞间的多样性如何影响皮层计算、同步和神经元通信仍在争论之中。以前的研究集中在一个神经元群体的神经元异质性的影响。在这里,我们特别感兴趣的神经元变异性的影响,两个人口之间的相位关系,这可能与不同的皮层通信假说。最近的研究表明,两个单向连接的神经元群体可以表现出预期的同步(AS),其特征在于负相位滞后。这种现象已经在非人类灵长类动物和人类EEG的电生理数据在视觉辨别认知任务。在实验中,单向耦合可以通过格兰杰因果关系来评估,并且可以伴随着皮质区之间的正或负相位差。在这里,我们提出了一个模型的两个耦合的人口中的神经元的异质性可以确定发送者和接收者之间的动力学关系,并可以重现在实验中报道的相位关系。取决于表征神经元放电模式的参数的分布,该系统可以表现出AS和通常的延迟同步制度(DS,具有正相位)以及AS和DS之间的零滞后同步制度和相位双稳态。此外,我们表明,我们的网络可以呈现多样性,在他们的相位关系保持兴奋抑制平衡。

英文摘要:

Several experiments and models have highlighted the importance of neuronal heterogeneity in brain dynamics and function. However, how such a cell-to-cell diversity can affect cortical computation, synchronization, and neuronal communication is still under debate. Previous studies have focused on the effect of neuronal heterogeneity in one neuronal population. Here we are specifically interested in the effect of neuronal variability on the phase relations between two populations, which can be related to different cortical communication hypotheses. It has been recently shown that two spiking neuron populations unidirectionally connected in a sender-receiver configuration can exhibit anticipated synchronization (AS), which is characterized by a negative phase-lag. This phenomenon has been reported in electrophysiological data of non-human primates and human EEG during a visual discrimination cognitive task. In experiments, the unidirectional coupling could be accessed by Granger causality and can be accompanied by both positive or negative phase difference between cortical areas. Here we propose a model of two coupled populations in which the neuronal heterogeneity can determine the dynamical relation between the sender and the receiver and can reproduce phase relations reported in experiments. Depending on the distribution of parameters characterizing the neuronal firing patterns, the system can exhibit both AS and the usual delayed synchronization regime (DS, with positive phase) as well as a zero-lag synchronization regime and phase bistability between AS and DS. Furthermore, we show that our network can present diversity in their phase relations maintaining the excitation-inhibition balance.

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