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Real-Time Value Integration During Economic Choice Is Regulated by Orbitofrontal Cortex

Overview
Journal Curr Biol
Publisher Cell Press
Specialty Biology
Date 2019 Dec 10
PMID 31813612
Citations 17
Authors
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Abstract

Neural correlates implicate the orbitofrontal cortex (OFC) in value-based or economic decision making [1-3]. Yet inactivation of OFC in rats performing a rodent version of the standard economic choice task is without effect [4, 5], a finding more in accord with ideas that the OFC is primarily necessary for behavior when new information must be taken into account [6-9]. Neural activity in the OFC spontaneously updates to reflect new information, particularly about outcomes [10-16], and the OFC is necessary for adjustments to learned behavior only under these conditions [4, 16-26]. Here, we merge these two independent lines of research by inactivating lateral OFC during an economic choice that requires new information about the value of the predicted outcomes to be incorporated into an already established choice. Outcome value was changed by pre-feeding the rats one of two food options before testing. In control rats, this pre-feeding resulted in divergent changes in choice behavior that depended on the rats' prior preference for the pre-fed food. Optogenetic inactivation of the OFC disrupted this bi-directional effect of pre-feeding without affecting other measures that describe the underlying choice behavior. This finding unifies the role of the OFC in economic choice with its role in a host of other behaviors, causally demonstrating that the OFC is not necessary for economic choice per se-unless that choice incorporates new information about the outcomes.

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