Encoding luminance surfaces in the visual cortex of mice and monkeys: Difference in responses to edge and center

Shany Nivinsky Margalit, Hamutal Slovin

Research output: Contribution to journalArticlepeer-review

Abstract

Luminance and spatial contrast provide information on the surfaces and edges of objects. We investigated neural responses to black and white surfaces in the primary visual cortex (V1) of mice and monkeys. Unlike primates that use their fovea to inspect objects with high acuity, mice lack a fovea and have low visual acuity. It thus remains unclear whether monkeys and mice share similar neural mechanisms to process surfaces. The animals were presented with white or black surfaces and the population responses were measured at high spatial and temporal resolution using voltage-sensitive dye imaging. In mice, the population response to the surface was not edge-dominated with a tendency to center-dominance, whereas in monkeys the response was edge-dominated with a "hole"in the center of the surface. The population response to the surfaces in both species exhibited suppression relative to a grating stimulus. These results reveal the differences in spatial patterns to luminance surfaces in the V1 of mice and monkeys and provide evidence for a shared suppression process relative to grating.

Original languageEnglish
Article numberbhae165
JournalCerebral Cortex
Volume34
Issue number4
DOIs
StatePublished - 1 Apr 2024

Bibliographical note

Publisher Copyright:
© The Author(s) 2024. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: [email protected].

Keywords

  • mice
  • monkeys
  • primary visual cortex
  • vision
  • voltage-sensitive dye imaging

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