Abnormal brain networks related to drug and nondrug reward anticipation and outcome processing in stimulant use disorder: a functional connectomics approach
Background - Drug addiction is associated with blunted neural responses to nondrug rewards, such as money, but heightened responses to drug cues that predict drug-reward outcomes. This dissociation underscores the role of incentive context in the attribution of motivational salience, which may refle...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
May 2023
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| In: |
Biological psychiatry. Cognitive neuroscience and neuroimaging
Year: 2023, Volume: 8, Issue: 5, Pages: 560-571 |
| ISSN: | 2451-9030 |
| DOI: | 10.1016/j.bpsc.2022.08.014 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1016/j.bpsc.2022.08.014 Verlag, kostenfrei, Volltext: https://www.sciencedirect.com/science/article/pii/S2451902222002178 
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| Author Notes: | Liam J. Nestor and Karen D. Ersche |
| Summary: | Background - Drug addiction is associated with blunted neural responses to nondrug rewards, such as money, but heightened responses to drug cues that predict drug-reward outcomes. This dissociation underscores the role of incentive context in the attribution of motivational salience, which may reflect a narrowing toward drug-related goals. This hypothesis, however, has scarcely been investigated. - Methods - To address this important scientific gap, the current study performed an empirical assessment of differences in salience attribution by comparing patients with stimulant use disorder (SUD) (n = 41) with control participants (n = 48) on network connectivity related to anticipation and outcome processing using a modified monetary incentive delay task. We hypothesized increased task-related activation and connectivity to drug rewards in patients with SUD, and reduced task-related activation and connectivity to monetary rewards during incentive processing across brain networks. - Results - In the presence of behavioral and regional brain activation similarities, we found that patients with SUD showed significantly less connectivity involving three separate distributed networks during monetary reward anticipation, and drug and monetary reward outcome processing. No group connectivity differences for drug reward anticipation were identified. Additional graph theory analyses revealed that patients with SUD had longer path lengths across these networks, all of which positively correlated with the duration of stimulant drug use. - Conclusions - Specific disruptions in connectivity in networks related to the anticipation of nondrug reward together with more general dysconnectivity in the processing of rewarding outcomes suggest an insensitivity to consequences. These observations support the notion of a predominance of habitual control in patients with SUD. |
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| Item Description: | Online verfügbar: 13. September 2022, Artikelversion: 5. Mai 2023 Gesehen am 28.08.2023 |
| Physical Description: | Online Resource |
| ISSN: | 2451-9030 |
| DOI: | 10.1016/j.bpsc.2022.08.014 |