Phasic pupillary responses modulate object-based attentional prioritization.

ABSTRACT: Visual attention studies have demonstrated that the shape of space-based selection can be governed by salient object contours: when a portion of an enclosed space is cued, the selected region extends to the full enclosure. Although this form of object-based attention (OBA) is well established, one continuing investigation focuses on whether this selection is obligatory or under voluntary control. We attempt to dissociate between these alternatives by interrogating the locus coeruleus-norepinephrine (LC-NE) system - known to fluctuate with top-down attention - during a classic two-rectangle paradigm in a sample of healthy human participants (N = 36). An endogenous spatial pre-cue directed voluntary space-based attention (SBA) to one end of a rectangular frame. We manipulated the reliability

SUBMITTER: O'Bryan SR 

PROVIDER: S-EPMC8084782 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature