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arXiv physics/9911048physics.bio-phq-bio
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全局耦合Hodgkin-Huxley神经元的相干共振和噪声诱导同步

Coherence Resonance and Noise-Induced Synchronization in Globally Coupled Hodgkin-Huxley Neurons

Yuqing Wang, David T. W. Chik, Z. D. Wang

摘要:

研究了全局耦合Hodgkin-Huxley神经元的相干共振。当神经元被设置在阈下区域,在放电阈值附近时,加性噪声诱导极限环。系统的相干性由噪声优化。发现尖峰训练的功率谱的峰高呈钟形曲线,与单个神经元的单调行为有显著不同。网络的耦合可以以两种不同的方式增强CR。特别地,当耦合足够强时,系统的同步被噪声诱导和优化。这种同步导致相干曲线的局部测量中的高且宽的平台。局部噪声诱导的极限环可以通过单个神经元的自主振荡、网络的耦合和局部噪声之间的动态优化演化为精细的时空序。

英文摘要:

The coherence resonance (CR) of globally coupled Hodgkin-Huxley neurons is studied. When the neurons are set in the subthreshold regime near the firing threshold, the additive noise induces limit cycles. The coherence of the system is optimized by the noise. A bell-shaped curve is found for the peak height of power spectra of the spike train, being significantly different from a monotonic behavior for the single neuron. The coupling of the network can enhance CR in two different ways. In particular, when the coupling is strong enough, the synchronization of the system is induced and optimized by the noise. This synchronization leads to a high and wide plateau in the local measure of coherence curve. The local-noise-induced limit cycle can evolve to a refined spatiotemporal order through the dynamical optimization among the autonomous oscillation of an individual neuron, the coupling of the network, and the local noise.

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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