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arXiv 0810.2901q-bio.NCq-bio.QM
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阈值神经元模型中的相关性和同步性

Correlations and Synchrony in Threshold Neuron Models

Tatjana Tchumatchenko, Aleksey Malyshev, Theo Geisel, Maxim Volgushev, Fred Wolf

摘要:

我们研究了阈值模型神经元如何将时间和神经元间的输入相关性转换为尖峰信号的相关性。我们发现,低共同输入政权是由放电率依赖的尖峰相关性,这是敏感的输入相关函数的详细结构。在高共同输入制度的尖峰相关性是不敏感的放电率,并表现出一个普遍的峰形独立的输入相关性。由共同输入驱动的速率异质对一般表现出不对称的尖峰相关性。所有的预测证实了在体外实验与皮质神经元驱动的合成波动输入电流。

英文摘要:

We study how threshold model neurons transfer temporal and interneuronal input correlations to correlations of spikes. We find that the low common input regime is governed by firing rate dependent spike correlations which are sensitive to the detailed structure of input correlation functions. In the high common input regime the spike correlations are insensitive to the firing rate and exhibit a universal peak shape independent of input correlations. Rate heterogeneous pairs driven by common inputs in general exhibit asymmetric spike correlations. All predictions are confirmed in in vitro experiments with cortical neurons driven by synthesized fluctuating input currents.

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