Physics of brain dynamics: Fokker-Planck analysis reveals changes in EEG δ-θ interactions in anæsthesia

Details Physics of brain dynamics: Fokker-Planck analysis reveals changes in EEG δ-θ interactions in anæsthesia Physics of brain dynamics: Fokker-Planck analysis reveals changes in EEG δ-θ interactions in anæsthesia

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009njph...11j3051b&link_type=abstract

New Journal of Physics, Volume 11, Issue 10, pp. 103051 (2009).

Physics

4

Scientific paper

We use drift and diffusion coefficients to reveal interactions between different oscillatory processes underlying a complex signal and apply the method to EEG δ and θ frequencies in the brain. By analysis of data recorded from rats during anæsthesia, we consider the stability and basins of attraction of fixed points in the phase portrait of the deterministic part of the retrieved stochastic process. We show that different classes of dynamics are associated with deep and light anæsthesia, and we demonstrate that the predominant directionality of the interaction is such that θ drives δ.

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