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arXiv 1411.7635q-bio.NC
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在体神经元动力学的统计模型

A statistical model for in vivo neuronal dynamics

Simone Carlo Surace, Jean-Pascal Pfister

摘要:

单神经元模型在计算神经科学中有着悠久的传统。诸如Hodgkin-Huxley模型的详细生物物理模型以及诸如积分激发模型类的简化神经元模型将输入电流与神经元的膜电位相关联。这些类型的模型已被广泛地拟合到输入电流受控的体外数据。然而,这些模型在表征细胞内体内记录时用处不大,因为神经元的输入是未知的。在这里,我们提出了一种新的单神经元模型,其特征在于在体内记录的统计特性。更具体地说,我们提出了一个随机过程,其中阈下膜电位遵循高斯过程,尖峰发射强度非线性地依赖于膜电位以及尖峰历史。我们首先表明,该模型具有丰富的动态剧目,因为它可以捕捉任意的阈下自协方差函数,发射率的适应以及任意形状的动作电位。然后,我们表明,该模型可以有效地拟合数据,而不会过度拟合。最后,我们表明,该模型可用于表征,因此精确地比较各种细胞内在不同的动物和实验条件下的体内记录。

英文摘要:

Single neuron models have a long tradition in computational neuroscience. Detailed biophysical models such as the Hodgkin-Huxley model as well as simplified neuron models such as the class of integrate-and-fire models relate the input current to the membrane potential of the neuron. Those types of models have been extensively fitted to in vitro data where the input current is controlled. Those models are however of little use when it comes to characterize intracellular in vivo recordings since the input to the neuron is not known. Here we propose a novel single neuron model that characterizes the statistical properties of in vivo recordings. More specifically, we propose a stochastic process where the subthreshold membrane potential follows a Gaussian process and the spike emission intensity depends nonlinearly on the membrane potential as well as the spiking history. We first show that the model has a rich dynamical repertoire since it can capture arbitrary subthreshold autocovariance functions, firing-rate adaptations as well as arbitrary shapes of the action potential. We then show that this model can be efficiently fitted to data without overfitting. Finally, we show that this model can be used to characterize and therefore precisely compare various intracellular in vivo recordings from different animals and experimental conditions.

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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