Separate and overlapping mechanisms of statistical regularities and salience processing in the occipital cortex and dorsal attention network.

ABSTRACT: Attention selects behaviorally relevant inputs for in-depth processing. Beside the role of traditional signals related to goal-directed and stimulus-driven control, a debate exists regarding the mechanisms governing the effect of statistical regularities on attentional selection, and how these are integrated with other control signals. Using a visuo-spatial search task under fMRI, we tested the joint effects of statistical regularities and stimulus-driven salience. We found that both types of signals modulated occipital activity in a spatially specific manner. Salience acted primarily by reducing the attention bias towards the target location when associated with irrelevant distractors, while statistical regularities reduced this attention bias when the target was presented at a low probab

SUBMITTER: Beffara B 

PROVIDER: S-EPMC10681649 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature