The DOI matches its Crossref record; 23 of the 23 references it cites were found in a registry or an index.
Dissociable neural representations of future reward magnitude and delay during temporal discounting
Open accessAbstract
In temporal discounting, individuals often prefer smaller immediate rewards to larger delayed rewards, implying a trade off between the magnitude and delay of future rewards. While recent functional magnetic resonance imaging (fMRI) investigations of temporal discounting have generated conflicting findings, no studies have focused on whether distinct neural substrates respond to the magnitude and delay of future rewards. Combining a novel, temporally distributed discounting task with event-related fMRI, we found that while nucleus accumbens (NAcc), mesial prefrontal cortical (MPFC), and posterior cingulate cortical (PCC) activation positively correlated with future reward magnitude, dorsolateral prefrontal cortical (DLPFC) and posterior parietal cortical (PPC) activation negatively correlated with future reward delay. Further, more impulsive individuals showed diminished NAcc activation to the magnitude of future rewards and greater deactivations to delays of future rewards in the MPFC, DLPFC, and PPC. These findings suggest that while mesolimbic dopamine projection regions show greater sensitivity to the magnitude of future rewards, lateral cortical regions show greater (negative) sensitivity to the delay of future rewards, potentially reconciling different neural accounts of temporal discounting.
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Lateral prefrontal cortex and self-control in intertemporal choice
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Metadata
- Authors
- Ballard, K., & Knutson, B.
- Venue
- NeuroImage
- Publisher
- Elsevier BV
- Published
- 2009-03
- Volume
- 45
- Issue
- 1
- Pages
- 143-150
- ISSN
- 1053-8119 (ISSN-L)
- OpenAlex
- W2166690108
- Cited by
- 453
- References
- 23
- FWCI
- 9.74
- Type
- journal article
- Language
- en
- Open access
- green
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