Amodal completion instead of predictive coding can explain activity suppression of early visual cortex during illusory shape perception.

ABSTRACT: A set of recent neuroimaging studies observed that the perception of an illusory shape can elicit both positive and negative feedback modulations in different parts of the early visual cortex. When three Pac-Men shapes were aligned in such a way that they created an illusory triangle (i.e., the Kanizsa illusion), neural activity in early visual cortex was enhanced in those neurons that had receptive fields that overlapped with the illusory shape but suppressed in neurons whose receptive field overlapped with the Pac-Men inducers. These results were interpreted as congruent with the predictive coding framework, in which neurons in early visual cortex enhance or suppress their activity depending on whether the top-down predictions match the bottom-up sensory inputs. However, there are severa

SUBMITTER: Yan C 

PROVIDER: S-EPMC8131992 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature