Laurent Bourdieu

29 mars 2013


Integration of multiwhisker stimuli in the rodent barrel cortex

invité par Thomas Deneux

abstract During exploration of their environment, rats contact objects with multiple whiskers in a complex spatio-temporal pattern. Recent electrophysiological experiments have demonstrated the existence of “global” neurons that encode correlated deflections of all whiskers and “local” neurons that detect angular contrast between the principal and surrounding whiskers. By combining functional imaging (two-photon fluorescence microscopy) and post-mortem histology, we demonstrate that local and global neurons are spatially segregated in layer II/III of the barrel cortex. This spatial segregation is pointing to the possibility that different neural networks in the upper layers of the barrel cortex sustain different functional roles in sensory processing and are put into play by different input statistics.

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