The precision of value-based choices depends causally on fronto-parietal phase coupling

Rafael Polanía, Marius Moisa, Alexander Opitz, Marcus Grueschow, Christian C. Ruff

Research output: Contribution to journalArticlepeer-review

74 Scopus citations

Abstract

Which meal would you like today, chicken or pasta? For such value-based choices, organisms must flexibly integrate various types of sensory information about internal states and the environment to transform them into actions. Recent accounts suggest that these choice-relevant processes are mediated by information transfer between functionally specialized but spatially distributed brain regions in parietal and prefrontal cortex; however, it remains unclear whether such fronto-parietal communication is causally involved in guiding value-based choices. We find that transcranially inducing oscillatory desynchronization between the frontopolar and -parietal cortex leads to more inaccurate choices between food rewards while leaving closely matched perceptual decisions unaffected. Computational modelling shows that this exogenous manipulation leads to imprecise value assignments to the choice alternatives. Thus, our study demonstrates that accurate value-based decisions critically involve coherent rhythmic information transfer between fronto-parietal brain areas and establishes an experimental approach to non-invasively manipulate the precision of value-based choices in humans.

Original languageEnglish (US)
Article number8090
JournalNature communications
Volume6
DOIs
StatePublished - Aug 20 2015

Bibliographical note

Funding Information:
We thank Silvia Maier for providing us with the set of food images. This work was supported by grants of the SNSF (105314_152891, CRSII3_141965 and 51NF40_144609) and the SNSF NCCR Affective Sciences to C.C.R.

Publisher Copyright:
© 2015 Macmillan Publishers Limited. All rights reserved.

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