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Stress and reward processing in bipolar disorder: a functional magnetic resonance imaging study.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Berghorst, Lisa H. Kumar, Poornima Greve, Doug N. Deckersbach, Thilo Ongur, Dost Dutra, S. Pizzagalli, Diego A. |
| Copyright Year | 2016 |
| Abstract | OBJECTIVES A link between negative life stress and the onset of mood episodes in bipolar disorder (BD) has been established, but processes underlying such a link remain unclear. Growing evidence suggests that stress can negatively affect reward processing and related neurobiological substrates, indicating that a dysregulated reward system may provide a partial explanation. The aim of this study was to test the impact of stress on reward-related neural functioning in BD. METHODS Thirteen euthymic or mildly depressed individuals with BD and 15 controls performed a Monetary Incentive Delay (MID) task while undergoing functional magnetic resonance imaging during no-stress and stress (negative psychosocial stressor involving poor performance feedback and threat of monetary deductions) conditions. RESULTS In hypothesis-driven region-of-interest analyses, a significant group-by-condition interaction emerged in the amygdala during reward anticipation. Relative to controls, while anticipating a potential reward, subjects with BD were characterized by amygdalar hyperactivation in the no-stress condition but hypoactivation during stress. Moreover, relative to controls, subjects with BD had significantly larger amygdala volumes. After controlling for structural differences, the effects of stress on amygdalar function remained, whereas groups no longer differed during the no-stress condition. During reward consumption, a group-by-condition interaction emerged in the putamen due to increased putamen activation in response to rewards in participants with BD during stress, but an opposite pattern in controls. CONCLUSIONS Overall, findings highlight possible impairments in using reward-predicting cues to adaptively engage in goal-directed actions in BD, combined with stress-induced hypersensitivity to reward consumption. Potential clinical implications are discussed. |
| Starting Page | 602 |
| Ending Page | 611 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| DOI | 10.1111/bdi.12444 |
| PubMed reference number | 27870507 |
| Journal | Medline |
| Volume Number | 18 |
| Issue Number | 7 |
| Alternate Webpage(s) | https://cdasr.mclean.harvard.edu/wp-content/uploads/2019/02/Berghorst_BD16.pdf |
| Alternate Webpage(s) | https://doi.org/10.1111/bdi.12444 |
| Journal | Bipolar disorders |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
