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arXiv 1401.4264math.PR
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相互作用神经元的流体动力学极限

Hydrodynamic limit for interacting neurons

Anna De Masi, Antonio Galves, Eva Löcherbach, Errico Presutti

摘要:

本文研究了一个随机过程的流体动力学极限,该过程描述了一个具有N个神经元的系统的时间演化,该系统具有由化学突触和电突触产生的平均场相互作用。该系统可以非正式地描述如下。每一个神经元随机地按照一个点过程发放脉冲,其频率取决于其膜电位。在其尖峰时刻,尖峰神经元的膜电位被重置为值0,同时,其他神经元的膜电位增加1/N的电位量。这模拟了化学突触的作用。此外,电突触的影响由所有膜电位向系统平均值的确定性漂移表示。我们发现,作为系统的大小N发散,膜电位的分布变得确定性和描述的极限密度服从非线性偏微分方程,这是一个守恒律的双曲型。

英文摘要:

This paper studies the hydrodynamic limit of a stochastic process describing the time evolution of a system with N neurons with mean-field interactions produced both by chemical and by electrical synapses. This system can be informally described as follows. Each neuron spikes randomly following a point process with rate depending on its membrane potential. At its spiking time, the membrane potential of the spiking neuron is reset to the value 0 and, simultaneously, the membrane potentials of the other neurons are increased by an amount of potential 1/N . This mimics the effect of chemical synapses. Additionally, the effect of electrical synapses is represented by a deterministic drift of all the membrane potentials towards the average value of the system. We show that, as the system size N diverges, the distribution of membrane potentials becomes deterministic and is described by a limit density which obeys a non linear PDE which is a conservation law of hyperbolic type.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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