On the classification of experimental data modeled via a stochastic leaky integrate and fire model through boundary values.
We present a computational algorithm aimed to classify single unit spike trains on the basis of observed interspikes intervals (ISI). The neuronal activity is modeled with a stochastic leaky integrate and fire model and the inverse first passage time method is extended to the Ornstein-Uhlenbeck (OU) process. Differences between spike trains are detected in terms of the boundary shape. The proposed classification method is applied to the analysis of multiple single units recorded simultaneously in the thalamus and in the cerebral cortex of unanesthetized rats during spontaneous activity. We show the existence of at least three different firing patterns that could not be classified using the usual statistical indices.
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Department of Mathematics, University of Torino, Via Carlo Alberto 10, 10123 Torino, Italy. laura.sacerdote@unito.it
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D000200:Action Potentials / Q000502:physiology; D000465:Algorithms; D000818:Animals; D002540:Cerebral Cortex / Q000502:physiology; D005260:Female; D008959:Models, Neurological; D009474:Neurons / Q000502:physiology*; D051381:Rats; D013788:Thalamus / Q000502:physiology