Substance Use Disorder Shared Reward-Circuit fMRI Abnormalities

Substance Use Disorder Shared Reward-Circuit fMRI Abnormalities

TL;DR: A 2025 systematic review in Translational Psychiatry found that substance use disorder was associated with recurring resting-state functional MRI (rs-fMRI), a scan of spontaneous brain-network communication, abnormalities in reward and self-control circuits across 53 studies. Key Findings 53-study meta-analysis: Researchers pooled whole-brain rs-fMRI studies covering 1,700 people with substance use disorder and 1,792 healthy …

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Ketamine Restored Reward Bias in Depression and Stressed Rats

Ketamine Restored Reward Bias Across Species

TL;DR: A 2026 translational study in Biological Psychiatry Global Open Science found that ketamine restored reward-learning bias in both treatment-resistant depression patients and chronically stressed rats. Key Findings Reward bias returned to healthy-control levels at 24 hours: In both treatment-resistant depression and chronically stressed rats — matching the rapid onset window where ketamine’s antidepressant effect …

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