Chaotic itinerancy, temporal segmentation and spatio-temporal combinatorial codes

Details Chaotic itinerancy, temporal segmentation and spatio-temporal combinatorial codes Chaotic itinerancy, temporal segmentation and spatio-temporal combinatorial codes

2006-05-05

arxiv.org/abs/q-bio/0605010v2

Physica D: Nonlinear Phenomena, Volume 237, Issue 1, p. 1-5 (2008)

Biology

Quantitative Biology

Neurons and Cognition

Scientific paper

10.1016/j.physd.2007.06.021

We study a deterministic dynamics with two time scales in a continuous state attractor network. To the usual (fast) relaxation dynamics towards point attractors (``patterns'') we add a slow coupling dynamics that makes the visited patterns to loose stability leading to an itinerant behavior in the form of punctuated equilibria. One finds that the transition frequency matrix between patterns shows non-trivial statistical properties in the chaotic itinerant regime. We show that mixture input patterns can be temporally segmented by the itinerant dynamics. The viability of a combinatorial spatio-temporal neural code is also demonstrated.

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