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Phys Rev E Stat Nonlin Soft Matter Phys. 2007 Dec;76(6 Pt 1):061912. Epub 2007 Dec 19.

Phase response curves in the characterization of epileptiform activity.

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Brain and Behaviour Programme, Neurosciences & Mental Health Programme, Hospital for Sick Children, Toronto, Ontario, Canada.


Coordinated cellular activity is a major characteristic of nervous system function. Coupled oscillator theory offers unique avenues to address cellular coordination phenomena. In this study, we focus on the characterization of the dynamics of epileptiform activity, based on some seizures that manifest themselves with very periodic rhythmic activity, termed absence seizures. Our approach consists in obtaining experimentally the phase response curves (PRCs) in the neocortex and thalamus, and incorporating these PRCs into a model of coupled oscillators. Phase preferences of the stationary states and their stability are determined, and these results from the model are compared with the experimental recordings, and interpreted in physiological terms.

[Indexed for MEDLINE]

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