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arXiv 2507.02450q-bio.NC
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平衡神经元网络的网络结构变点检测与重构

Network structural change point detection and reconstruction for balanced neuronal networks

Kai Chen, Mingzhang Wang, Songting Li, Douglas Zhou

AI总结:

本文针对神经元网络结构连接动态变化的重构难题,提出CPD-TDCC统一框架,通过变点检测结合成对时滞相关方法,在平衡网络和稀疏采样条件下实现拓扑与突触强度的准确重构。

摘要:

理解大脑动力学与功能关键依赖于对神经元之间网络连接的认识。然而,脑结构连接的复杂性,加上突触可塑性驱动的持续修改,使得直接实验测量尤为困难。基于神经元记录的常规连接推断方法通常假设底层结构连接是静态的,并要求神经活动具有稳定的统计特征,因此不适合重构发生变化的网络结构连接。为满足重构可能发生结构变化的网络的需求,我们提出一个统一的网络重构框架,该框架将连接诱导的变点检测(CPD)与成对时滞相关系数(TDCC)方法相结合。对于处于平衡状态的一般神经元网络,我们基于神经元电压时间序列的波动,发展了一种用于判别结构连接变化的理论分析。随后,我们展示了一种成对TDCC方法,利用在检测到的变点处进行分段后的脉冲序列记录来重构网络。我们通过使用多种神经元模型的大规模网络模拟,展示了CPD-TDCC网络重构方法的有效性。关键的是,我们的方法能够适应网络拓扑和突触耦合强度同时发生变化的网络,并且即使在仅有稀疏采样子网络数据的情况下仍保持准确性,从而为真实实验情境中的实际应用取得了关键进展。我们的CPD-TDCC框架通过考虑连接诱导的变点,弥补了网络重构中的关键空白,有望为研究皮层脑的结构与动力学提供有价值的工具。

英文摘要:

Understanding brain dynamics and functions critically depends on knowledge of the network connectivity among neurons. However, the complexity of brain structural connectivity, coupled with continuous modifications driven by synaptic plasticity, makes its direct experimental measurement particularly challenging. Conventional connectivity inference methods based on neuronal recordings often assumes a static underlying structural connectivity and requires stable statistical features of neural activities, making them unsuitable for reconstructing structural connectivity that undergoes changes. To fulfill the needs of reconstructing networks undergoing potential structural changes, we propose a unified network reconstruction framework that combines connectivity-induced change point detection (CPD) with pairwise time-delayed correlation coefficient (TDCC) method. For general neuronal networks in balanced regimes, we develop a theoretical analysis for discriminating changes in structural connectivity based on the fluctuation of neuronal voltage time series. We then demonstrate a pairwise TDCC method to reconstruct the network using spike train recordings segmented at the detected change points. We show the effectiveness of our CPD-TDCC network reconstruction using large-scale network simulations with multiple neuronal models. Crucially, our method accommodates networks with changes in both network topologies and synaptic coupling strengths while retaining accuracy even with sparsely sampled subnetwork data, achieving a critical advancement for practical applications in real experimental situations. Our CPD-TDCC framework addresses the critical gap in network reconstruction by accounting connectivity-induced changes points, potentially offering a valuable tool for studying structure and dynamics in the cortical brain.

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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