Nueral Correlates of Evidence Accumulation During Value-Based Decisions Revealed via Simultaneous EEG-fMRI

M. Andrea Pisauro, Elsa Fouragnan, Chris Retzler, Marios G. Philiastides

Research output: Contribution to journalArticle

23 Citations (Scopus)

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 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.
LanguageEnglish
Article number808
Number of pages9
JournalNature Communications
Volume8
Issue number15
DOIs
Publication statusPublished - 9 Jun 2017

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electroencephalography
Frontal Lobe
Electroencephalography
Prefrontal Cortex
cortexes
Magnetic Resonance Imaging
Parietal Lobe
Brain
brain

Cite this

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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 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.",
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Nueral Correlates of Evidence Accumulation During Value-Based Decisions Revealed via Simultaneous EEG-fMRI. / Pisauro, M. Andrea; Fouragnan, Elsa; Retzler, Chris; Philiastides, Marios G.

In: Nature Communications, Vol. 8, No. 15, 808, 09.06.2017.

Research output: Contribution to journalArticle

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