Prior Expectation Modulates Repetition Suppression without Perceptual Awareness.

ABSTRACT: Stimulus repetition induces attenuated brain responses. This phenomenon, termed repetition suppression (RS), is classically held to stem from bottom-up neuronal adaptation. However, recent studies suggest that RS is driven by top-down predictive mechanisms. It remains controversial whether these top-down mechanisms of RS rely on conscious strategies, or if they represent a more fundamental aspect of perception, coding for physical properties of the repeated feature. The presence of top-down effects in the absence of perceptual awareness would indicate that conscious strategies are not sufficient to explain top-down mechanisms of RS. We combined an unconscious priming paradigm with EEG recordings and tested whether RS can be modulated by the probability of encountering a repetition, even in

SUBMITTER: Barbosa LS 

PROVIDER: S-EPMC5864919 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature