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Information coding in a laminar computational model of cat primary visual cortex

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Abstract

Neural populations across cortical layers perform different computational tasks. However, it is not known whether information in different layers is encoded using a common neural code or whether it depends on the specific layer. Here we studied the laminar distribution of information in a large-scale computational model of cat primary visual cortex. We analyzed the amount of information about the input stimulus conveyed by the different representations of the cortical responses. In particular, we compared the information encoded in four possible neural codes: (1) the information carried by the firing rate of individual neurons; (2) the information carried by spike patterns within a time window; (3) the rate-and-phase information carried by the firing rate labelled by the phase of the Local Field Potentials (LFP); (4) the pattern-and-phase information carried by the spike patterns tagged with the LFP phase. We found that there is substantially more information in the rate-and-phase code compared with the firing rate alone for low LFP frequency bands (less than 30 Hz). When comparing how information is encoded across layers, we found that the extra information contained in a rate-and-phase code may reach 90 % in Layer 4, while in other layers it reaches only 60 %, compared to the information carried by the firing rate alone. These results suggest that information processing in primary sensory cortices could rely on different coding strategies across different layers.

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Acknowledgement

This work was supported by EPSRC research grant EP/C010841/1.

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Authors and Affiliations

  1. Plymouth University, Plymouth, UK

    Gleb Basalyga & Thomas Wennekers

  2. University of Manchester, Manchester, UK

    Marcelo A. Montemurro

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  1. Gleb Basalyga
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  2. Marcelo A. Montemurro
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  3. Thomas Wennekers
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Correspondence to Gleb Basalyga.

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Action Editor: Gaute T Einevoll

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Basalyga, G., Montemurro, M.A. & Wennekers, T. Information coding in a laminar computational model of cat primary visual cortex. J Comput Neurosci 34, 273–283 (2013). https://doi.org/10.1007/s10827-012-0420-x

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  • DOI: https://doi.org/10.1007/s10827-012-0420-x

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