Contribution of area 17 to cell responses in the striate-recipient zone of the cat's lateral posterior-pulvinar complex

The European Journal of Neuroscience
C CasanovaS Darveau

Abstract

The cat's lateral posterior-pulvinar complex (LP-pulvinar) contains three main representations of the visual field. The lateral part of the LP nucleus (LPl or striate-recipient zone) is the only region of these extrageniculate nuclei which receives afferents from the primary visual cortex. We investigated the contribution of area 17 to the response properties (orientation and spatial frequency tuning functions) of LPl neurons by cooling or lesioning the visual cortex. Responses of 40 LPl cells were studied before, during and after the reversible cooling of the striate cortex. When tested for orientation, a total of 10 units out of 28 was affected (36%). For most of these cells (eight of 10), cooling the visual cortex yielded a reduction of the cells' visual responses without altering their orientation-selectivity (there was no significant change in the orientation tuning width). For only two cells, inactivation led to an increase in the response amplitude. Also, blocking the visual cortex never modified the direction-selectivity of LPl cells. When tested for spatial frequency, 12 neurons out of 33 were affected (36%) by the experimental protocol. In most cases, we observed a reduction in the responses at each spatial frequency ...Continue Reading

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Citations

Mar 25, 2005·The European Journal of Neuroscience·Dave Saint-AmourFranco Lepore
Jun 24, 2005·The Journal of Comparative Neurology·R Jarrett RushmoreStephen G Lomber
Aug 14, 2019·Cerebral Cortex·Bruno Oliveira Ferreira de SouzaChristian Casanova
Nov 24, 2020·The Journal of Comparative Neurology·Bruno Oliveira Ferreira de SouzaDenis Boire
Jul 24, 2021·Cerebral Cortex Communications·Reza Abbas FarishtaChristian Casanova
Oct 7, 2021·Current Biology : CB·Megan A KirchgessnerEdward M Callaway

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