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• W1983473118 endingPage "e85451" @default.
• W1983473118 startingPage "e85451" @default.
• W1983473118 abstract "The dynamics of individual neurons are crucial for producing functional activity in neuronal networks. An open question is how temporal characteristics can be controlled in bursting activity and in transient neuronal responses to synaptic input. Bifurcation theory provides a framework to discover generic mechanisms addressing this question. We present a family of mechanisms organized around a global codimension-2 bifurcation. The cornerstone bifurcation is located at the intersection of the border between bursting and spiking and the border between bursting and silence. These borders correspond to the blue sky catastrophe bifurcation and the saddle-node bifurcation on an invariant circle (SNIC) curves, respectively. The cornerstone bifurcation satisfies the conditions for both the blue sky catastrophe and SNIC. The burst duration and interburst interval increase as the inverse of the square root of the difference between the corresponding bifurcation parameter and its bifurcation value. For a given set of burst duration and interburst interval, one can find the parameter values supporting these temporal characteristics. The cornerstone bifurcation also determines the responses of silent and spiking neurons. In a silent neuron with parameters close to the SNIC, a pulse of current triggers a single burst. In a spiking neuron with parameters close to the blue sky catastrophe, a pulse of current temporarily silences the neuron. These responses are stereotypical: the durations of the transient intervals-the duration of the burst and the duration of latency to spiking-are governed by the inverse-square-root laws. The mechanisms described here could be used to coordinate neuromuscular control in central pattern generators. As proof of principle, we construct small networks that control metachronal-wave motor pattern exhibited in locomotion. This pattern is determined by the phase relations of bursting neurons in a simple central pattern generator modeled by a chain of oscillators." @default.
• W1983473118 created "2016-06-24" @default.
• W1983473118 creator A5047112461 @default.
• W1983473118 creator A5056913077 @default.
• W1983473118 date "2014-01-31" @default.
• W1983473118 modified "2023-10-14" @default.
• W1983473118 title "A Codimension-2 Bifurcation Controlling Endogenous Bursting Activity and Pulse-Triggered Responses of a Neuron Model" @default.
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• W1983473118 doi "https://doi.org/10.1371/journal.pone.0085451" @default.
• W1983473118 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3908860" @default.
• W1983473118 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24497927" @default.

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