A multiple-response frequency-tagging paradigm measures graded changes in consciousness during perceptual filling-in.

ABSTRACT: Perceptual filling-in (PFI) occurs when a physically present visual target disappears from conscious perception, with its location filled-in by the surrounding visual background. These perceptual changes are complete, near instantaneous, and can occur for multiple separate locations simultaneously. Here, we show that contrasting neural activity during the presence or absence of multi-target PFI can complement other findings from multistable phenomena to reveal the neural correlates of consciousness (NCC). We presented four peripheral targets over a background dynamically updating at 20 Hz. While participants reported on target disappearances/reappearances via button press/release, we tracked neural activity entrained by the background during PFI using steady-state visually evoked potential

SUBMITTER: Davidson MJ 

PROVIDER: S-EPMC7151726 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature