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• W2028651619 startingPage "2321" @default.
• W2028651619 abstract "Identifying similar spike-train patterns is a key element in understanding neural coding and computation. For single neurons, similar spike patterns evoked by stimuli are evidence of common coding. Across multiple neurons, similar spike trains indicate potential cell assemblies. As recording technology advances, so does the urgent need for grouping methods to make sense of large-scale datasets of spike trains. Existing methods require specifying the number of groups in advance, limiting their use in exploratory analyses. I derive a new method from network theory that solves this key difficulty: it self-determines the maximum number of groups in any set of spike trains, and groups them to maximize intragroup similarity. This method brings us revealing new insights into the encoding of aversive stimuli by dopaminergic neurons, and the organization of spontaneous neural activity in cortex. I show that the characteristic pause response of a rat's dopaminergic neuron depends on the state of the superior colliculus: when it is inactive, aversive stimuli invoke a single pattern of dopaminergic neuron spiking; when active, multiple patterns occur, yet the spike timing in each is reliable. In spontaneous multineuron activity from the cortex of anesthetized cat, I show the existence of neural ensembles that evolve in membership and characteristic timescale of organization during global slow oscillations. I validate these findings by showing that the method both is remarkably reliable at detecting known groups and can detect large-scale organization of dynamics in a model of the striatum." @default.
• W2028651619 created "2016-06-24" @default.
• W2028651619 creator A5019692766 @default.
• W2028651619 date "2011-02-09" @default.
• W2028651619 modified "2023-10-17" @default.
• W2028651619 title "Spike-Train Communities: Finding Groups of Similar Spike Trains" @default.
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• W2028651619 doi "https://doi.org/10.1523/jneurosci.2853-10.2011" @default.
• W2028651619 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6633034" @default.
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