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Monkey V1/V2 neuronal population response to drifting gratings with varying orientation and contrast

Xia, Ji1; Jasper, Anna2; Kohn, Adam2; Miller, Kenneth1

Published Jun 15, 2024 on Dryad. https://doi.org/10.5061/dryad.h9w0vt4s0

Data files

Jun 15, 2024 version files 1.83 GB
Jun 15, 2024 version files 1.83 GB

Abstract

Correlated variability in the visual cortex is modulated by stimulus properties. The stimulus dependence of correlated variability impacts stimulus coding and is indicative of circuit structure. An affine model combining a multiplicative factor and an additive offset has been proposed to explain how correlated variability in primary visual cortex (V1) depends on stimulus orientations. However, whether the affine model could be extended to explain modulations by other stimulus variables or variability shared between two brain areas is unknown. Motivated by a simple neural circuit mechanism, we modified the affine model to better explain the contrast-dependence of neural variability shared within either primary or secondary visual cortex (V1 or V2) as well as the orientation-dependence of neural variability shared between V1 and V2. Our results bridge neural circuit mechanisms and statistical models, and provide a parsimonious explanation for the stimulus-dependence of correlated variability within and between visual areas.