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首页> 外文期刊>Physica, A. Statistical mechanics and its applications >White noise-induced spiral waves and multiple spatial coherence resonances in a neuronal network with type i excitability
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White noise-induced spiral waves and multiple spatial coherence resonances in a neuronal network with type i excitability

机译：白噪声引起的螺旋波和i型兴奋性神经网络中的多个空间相干共振

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摘要

White noise-induced pattern formation is studied in a network composed of Morris-Lecar neuronal models with type I excitability and with initial values higher than that of the resting potential. The appearance and disappearance of spiral waves, as well as the transitions between spiral wave patterns with different kinds of complexity characterized by the normalized spatial autocorrelation function, enable changes in the order of the network so as to exhibit a scenario with two or more locally maximal peaks, as can be clearly seen in the signal to noise ratio curves, as the noise intensity is adjusted from small to large in a wide range. A possible physical mechanism of the multiple resonances based on the dynamics of type I excitability and initial values is provided. The potential biological significance of the noise-induced spiral waves is discussed.
机译：在由Morris-Lecar神经元模型组成的网络中研究白噪声诱导的模式形成，该模型具有I型兴奋性且初始值高于静息电位。螺旋波的出现和消失，以及以归一化空间自相关函数为特征的复杂度不同的螺旋波模式之间的过渡，使网络顺序发生变化，从而呈现出具有两个或多个局部最大值的场景在信噪比曲线中可以清楚地看到，由于在宽范围内将噪声强度从小到大进行了调整，因此出现了峰值。提供了基于I型兴奋性和初始值的动力学的多重共振的可能物理机制。讨论了噪声引起的螺旋波的潜在生物学意义。

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