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arXiv 2406.07445q-bio.NCcond-mat.dis-nn
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非线性随机积分发放神经元网络中的亚稳态

Metastability in networks of nonlinear stochastic integrate-and-fire neurons

Siddharth Paliwal, Gabriel Koch Ocker, Braden A. W. Brinkman

AI总结:

本研究针对单神经元非线性与神经群体集体活动的关联问题,采用随机漏性积分发放模型的场论公式,揭示了非线性尖峰强度与膜电位重置的相互作用可诱发循环网络亚稳态,并对发放率和膜电位产生同向或反向调控效应。

摘要:

大脑中的神经元持续处理着从环境接收的大量感官输入。大量实验研究表明,神经群体的集体活动编码并处理这种持续的信息涌入。这些集体活动模式如何依赖于单神经元特性,目前通常尚不明确。单神经元记录显示,单个神经元对输入的响应是非线性的,这使得人们无法直接从单神经元特征外推得到涌现的集体状态。本文中,我们采用随机漏性积分发放模型的场论公式,研究单神经元非线性特性对宏观网络活动的影响。在该模型中,神经元将其他神经元的尖峰输出整合到其膜电位中,并以依赖于膜电位的强度随机发放尖峰,之后膜电位重置。我们发现,非线性尖峰强度函数与膜电位重置之间的相互作用可以:1)在循环网络中产生亚稳态的活跃发放率状态;2)可以增强或抑制平均发放率和膜电位,且二者变化方向可能相同,也可能出现矛盾的相反方向。

英文摘要:

Neurons in the brain continuously process the barrage of sensory inputs they receive from the environment. A wide array of experimental work has shown that the collective activity of neural populations encodes and processes this constant bombardment of information. How these collective patterns of activity depend on single-neuron properties is often unclear. Single-neuron recordings have shown that individual neurons' responses to inputs are nonlinear, which prevents a straightforward extrapolation from single neuron features to emergent collective states. Here, we use a field-theoretic formulation of a stochastic leaky integrate-and-fire model to study the impact of single-neuron nonlinearities on macroscopic network activity. In this model, a neuron integrates spiking output from other neurons in its membrane voltage and emits spikes stochastically with an intensity depending on the membrane voltage, after which the voltage resets. We show that the interplay between nonlinear spike intensity functions and membrane potential resets can i) give rise to metastable active firing rate states in recurrent networks, and ii) can enhance or suppress mean firing rates and membrane potentials in the same or paradoxically opposite directions.

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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