Spatial frequency supports the emergence of categorical representations in visual cortex during natural scene perception.

ABSTRACT: In navigating our environment, we rapidly process and extract meaning from visual cues. However, the relationship between visual features and categorical representations in natural scene perception is still not well understood. Here, we used natural scene stimuli from different categories and filtered at different spatial frequencies to address this question in a passive viewing paradigm. Using representational similarity analysis (RSA) and cross-decoding of magnetoencephalography (MEG) data, we show that categorical representations emerge in human visual cortex at ∼180 ms and are linked to spatial frequency processing. Furthermore, dorsal and ventral stream areas reveal temporally and spatially overlapping representations of low and high-level layer activations extracted from a feedforwar

SUBMITTER: Dima DC 

PROVIDER: S-EPMC6057270 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature