皮質ニューロンの入出力機構(基研研究会「ニューラルネットワーク～これからの統計力学的アプローチ～」,研究会報告)

Abstract

Cortical neurons of behaving animals generate highly irregular spike sequences. Recently, Softky and Koch(1993) pointed out that the Leaky Integrate-and-Fire model on some feasible assumptions doesn't reproduce the irregularity. We examine whether this model is really inconsistent with real neuronal spike sequences. Using the higher order statistics of the inter-spike-intervals, it is found that the model is not perfectly consistent with the actual data. We add the effect of shunting inhibition to this model, but the inconsistency still remains.