Behavioural and neural signatures of perceptual decision-making are modulated by pupil-linked arousal.

ABSTRACT: The timing and accuracy of perceptual decision-making is exquisitely sensitive to fluctuations in arousal. Although extensive research has highlighted the role of various neural processing stages in forming decisions, our understanding of how arousal impacts these processes remains limited. Here we isolated electrophysiological signatures of decision-making alongside signals reflecting target selection, attentional engagement and motor output and examined their modulation as a function of tonic and phasic arousal, indexed by baseline and task-evoked pupil diameter, respectively. Reaction times were shorter on trials with lower tonic, and higher phasic arousal. Additionally, these two pupil measures were predictive of a unique set of EEG signatures that together represent multiple informati

SUBMITTER: van Kempen J 

PROVIDER: S-EPMC6450670 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature