Neural correlates of evidence accumulation during value-based decisions revealed via simultaneous EEG-fMRI.

ABSTRACT: Current computational accounts posit that, in simple binary choices, humans accumulate evidence in favour of the different alternatives before committing to a decision. Neural correlates of this accumulating activity have been found during perceptual decisions in parietal and prefrontal cortex; however the source of such activity in value-based choices remains unknown. Here we use simultaneous EEG-fMRI and computational modelling to identify EEG signals reflecting an accumulation process and demonstrate that the within- and across-trial variability in these signals explains fMRI responses in posterior-medial frontal cortex. Consistent with its role in integrating the evidence prior to reaching a decision, this region also exhibits task-dependent coupling with the ventromedial prefrontal co

SUBMITTER: Pisauro MA 

PROVIDER: S-EPMC5472767 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature