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ANC/DTC Seminar: Stefano Panzeri, University of Glasgow (Host: Mark van Rossum)

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Multiplexing of naturalistic sensory information in visual cortex

What
  • ANC/DTC Seminar
When Dec 11, 2012
from 11:00 AM to 12:00 PM
Where If 4.31/4.33
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Stefano Panzeri, Institute of Neuroscience and Psychology, University of Glasgow

Sensory stimuli elicit cortical responses over a broad range of temporal frequencies. Yet, how this broad range of frequencies is used to transmit or process information remains largely unknown. We investigated this issue by analyzing and modelling responses of primary visual cortical populations to naturalistic film clips. Information theoretic analysis of these data reveals that visual information is distributed over a small number of frequency ranges, each carrying a different type of visual information and each generated by a different laminar cortical circuit. Neural network models of recurrent networks suggest  that each independent informative frequency channel  reflects a different type of neural-neural or stimulus-neural interaction. Taken together, these results suggest that sensory cortices multiplex complex sensory information over several different time scales and provide some guesses about  the neural circuits and mechanisms mediating this multiplexing.

This is joint work with the group of Nikos Logothetis at the Max Planck Institute of Biological Cybernetics in Tuebingen.