Emergence of a contrast-invariant representation of naturalistic texture in macaque visual cortex.

ABSTRACT: Sensory stimuli vary across a variety of dimensions, like contrast, orientation, or texture. The brain must rely on population representations to distinguish changes in one dimension from changes in another. To understand how the visual system might extract separable stimulus representations, we recorded multiunit neuronal responses to texture images varying along two dimensions: contrast, a property represented as early as the retina, and naturalistic statistical structure, a property that modulates neuronal responses in V2 and V4, but not in V1. We measured how sites in these 3 cortical areas responded to variation in both dimensions. Contrast modulated responses in all areas. In V2 and V4, the presence of naturalistic structure both modulated responses and increased contrast sensitivity

SUBMITTER: Lee GM 

PROVIDER: S-EPMC12684934 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature