ORCID
- M. Andrea Pisauro: 0000-0001-6087-2597
- Elsa Fouragnan: 0000-0003-1485-0332
Abstract
AbstractCurrent 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 cortex and the striatum, brain areas known to encode the subjective value of the decision alternatives. These results further endorse the proposition of an evidence accumulation process during value-based decisions in humans and implicate the posterior-medial frontal cortex in this process.
Publication Date
2017-01-01
Publication Title
Nature Communications
Volume
8
Issue
1
ISSN
2041-1723
Recommended Citation
Philiastides, M., Pisauro, M., Fouragnan, E., & Retzler, C. (2017) 'Neural correlates of evidence accumulation during value-based decisions revealed via simultaneous EEG-fMRI', Nature Communications, 8(1). Available at: 10.1038/ncomms15808
