Gazing into spatiotemporal 'known unknowns': the influence of uncertainty on pupil size and saccadic eye movements.

ABSTRACT: Expectation of a future stimulus increases the preparedness to act once it actually appears and results in reduced latency of the appropriate motor response. Real world events are uncertain both spatially and/or temporally but this uncertainty could itself be expected. In the presence of both expected spatial and temporal uncertainty, which one should be prioritized by the motor system could depend on the context. Therefore, we investigated the relative weight of expected spatial and temporal uncertainty during the preparation of a saccadic eye movement. A reaction time task was used with a variable foreperiod between a warning and an imperative visual stimuli. Expected temporal and/or spatial uncertainty associated with the stimulus was cued. We found that before imperative stimulus onset

SUBMITTER: Boutachkourt A 

PROVIDER: S-EPMC11289384 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature