Uniform spatial pooling explains topographic organization and deviation from receptive-field scale invariance in primate V1.

ABSTRACT: Receptive field (RF) size and preferred spatial frequency (SF) vary greatly across the primary visual cortex (V1), increasing in a scale invariant fashion with eccentricity. Recent studies reveal that preferred SF also forms a fine-scale periodic map. A fundamental open question is how local variability in preferred SF is tied to the overall spatial RF. Here, we use two-photon imaging to simultaneously measure maps of RF size, phase selectivity, SF bandwidth, and orientation bandwidth-all of which were found to be topographically organized and correlate with preferred SF. Each of these newly characterized inter-map relationships strongly deviate from scale invariance, yet reveal a common motif-they are all accounted for by a model with uniform spatial pooling from scale invariant inputs. O

SUBMITTER: Chen Y 

PROVIDER: S-EPMC7738493 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature