Cortical magnification eliminates differences in contrast sensitivity across but not around the visual field.

ABSTRACT: Human visual performance changes dramatically both across (eccentricity) and around (polar angle) the visual field. Performance is better at the fovea, decreases with eccentricity, and is better along the horizontal than vertical meridian and along the lower than the upper vertical meridian. However, all neurophysiological and virtually all behavioral studies of cortical magnification have investigated eccentricity effects without considering polar angle. Most performance differences due to eccentricity are eliminated when stimulus size is cortically magnified (M-scaled) to equate the size of its cortical representation in primary visual cortex (V1). But does cortical magnification underlie performance differences around the visual field? Here, to assess contrast sensitivity, human

SUBMITTER: Jigo M 

PROVIDER: S-EPMC10089656 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature