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• W2080216655 abstract "From the perspective of neural coding, the considerable trial-to-trial variability in the responses of neurons to sensory stimuli is puzzling. Trial-to-trial response variability is typically interpreted in terms of noise (i.e., it represents either intrinsic noise of the system or information unrelated to the stimuli). However, trial-to-trial response variability can be considerably different across stimuli, suggesting that it could also provide an important contribution to the information conveyed by the neural responses about the stimuli. To test this hypothesis, we addressed the problem of discriminating stimulus location from the spike-count responses of neurons recorded in the ventro-postero-medial (VPM) nucleus of the thalamus in anesthetized rats. Using a recently developed information theory approach, we verified that differences between stimuli in the trial-to-trial spike-count variability of the responses provided an important contribution to the overall information carried by the neurons. In addition, we found that the relatively reliable (sub-Poisson) firing regime of our VPM neurons was not only more informative, but also more redundant between neurons compared with a more variable (Poisson) firing regime with the same total number of spikes. The typical increase in trial-to-trial response variability from the periphery to the cortex could therefore serve as a strategy to reduce redundancy between neurons and promote efficient sparse coding distributed in large populations of neurons. Overall, our data suggest that the trial-to-trial response variability plays a critical role in establishing the trade-off between total information and redundancy between neurons in population codes." @default.
• W2080216655 created "2016-06-24" @default.
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• W2080216655 date "2011-08-22" @default.
• W2080216655 modified "2023-09-27" @default.
• W2080216655 title "Trial-to-trial variability in the responses of neurons carries information about stimulus location in the rat whisker thalamus" @default.
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• W2080216655 doi "https://doi.org/10.1073/pnas.1103168108" @default.
• W2080216655 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3169105" @default.
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