Functional dissociations of risk and reward processing in the medial prefrontal cortex.
paper
Cited
Public
Unavailable
- Authors
- Xue, Gui; Lu, Zhonglin; Levin, Irwin P; Weller, Joshua A; Li, Xiangrui; Bechara, Antoine
- Year
- 2009
- Journal
- Cerebral cortex (New York, N.Y. : 1991)
- PMID
- 18842669
- DOI
- 10.1093/cercor/bhn147
- PMCID
- PMC2665154
Making a risky decision is a complex process that involves evaluation of both the value of the options and the associated risk level. Yet the neural processes underlying these processes have not so far been clearly identified. Using functional magnetic resonance imaging and a task that simulates risky decisions, we found that the dorsal region of the medial prefrontal cortex (MPFC) was activated whenever a risky decision was made, but the degree of this activity across subjects was negatively correlated with their risk preference. In contrast, the ventral MPFC was parametrically modulated by the received gain/loss, and the activation in this region was positively correlated with an individual's risk preference. These results extend existing neurological evidence by showing that the dorsal and ventral MPFC convey different decision signals (i.e., aversion to uncertainty vs. approach to rewarding outcomes), where the relative strengths of these signals determine behavioral decisions involving risk and uncertainty.
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| Title | Year | PMID |
|---|---|---|
| Reward processing deficits and impulsivity in high-risk offspring of alcoholics: A study of event-related potentials during a monetary gambling task. | 2015 | 26388585 |
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