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- W2043946327 abstract "Synchronous spiking during cerebellar tasks has been observed across Purkinje cells: however, little is known about the intrinsic cellular mechanisms responsible for its initiation, cessation and stability. The Phase Response Curve (PRC), a simple input-output characterization of single cells, can provide insights into individual and collective properties of neurons and networks, by quantifying the impact of an infinitesimal depolarizing current pulse on the time of occurrence of subsequent action potentials, while a neuron is firing tonically. Recently, the PRC theory applied to cerebellar Purkinje cells revealed that these behave as phase-independent integrators at low firing rates, and switch to a phase-dependent mode at high rates. Given the implications for computation and information processing in the cerebellum and the possible role of synchrony in the communication with its post-synaptic targets, we further explored the firing rate dependency of the PRC in Purkinje cells. We isolated key factors for the experimental estimation of the PRC and developed a closed-loop approach to reliably compute the PRC across diverse firing rates in the same cell. Our results show unambiguously that the PRC of individual Purkinje cells is firing rate dependent and that it smoothly transitions from phase independent integrator to a phase dependent mode. Using computational models we show that neither channel noise nor a realistic cell morphology are responsible for the rate dependent shift in the phase response curve." @default.
- W2043946327 created "2016-06-24" @default.
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- W2043946327 date "2015-03-16" @default.
- W2043946327 modified "2023-10-01" @default.
- W2043946327 title "On the Firing Rate Dependency of the Phase Response Curve of Rat Purkinje Neurons In Vitro" @default.
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- W2043946327 doi "https://doi.org/10.1371/journal.pcbi.1004112" @default.
- W2043946327 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4361458" @default.
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- W2043946327 hasPublicationYear "2015" @default.
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