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Contribution Details
| Type | Journal Article |
| Scope | Discipline-based scholarship |
| Title | Influence of dopaminergically mediated reward on somatosensory decision-making |
| Organization Unit | |
| Authors |
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| Item Subtype | Original Work |
| Refereed | Yes |
| Status | Published in final form |
| Language |
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| Journal Title | PLoS Biology |
| Publisher | Public Library of Science (PLoS) |
| Geographical Reach | international |
| ISSN | 1544-9173 |
| Volume | 7 |
| Number | 7 |
| Page Range | e1000164 |
| Date | 2009 |
| Abstract Text | Reward-related dopaminergic influences on learning and overt behaviour are well established, but any influence on sensory decision-making is largely unknown. We used functional magnetic resonance imaging (fMRI) while participants judged electric somatosensory stimuli on one hand or other, before being rewarded for correct performance at trial end via a visual signal, at one of four anticipated financial levels. Prior to the procedure, participants received either placebo (saline), a dopamine agonist (levodopa), or an antagonist (haloperidol). Principal findings: higher anticipated reward improved tactile decisions. Visually signalled reward reactivated primary somatosensory cortex for the judged hand, more strongly for higher reward. After receiving a higher reward on one trial, somatosensory activations and decisions were enhanced on the next trial. These behavioural and neural effects were all enhanced by levodopa and attenuated by haloperidol, indicating dopaminergic dependency. Dopaminergic reward-related influences extend even to early somatosensory cortex and sensory decision-making. |
| Free access at | PubMed ID |
| Digital Object Identifier | 10.1371/journal.pbio.1000164 |
| PubMed ID | 19636360 |
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