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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Medical Cannabis for Anxiety, PTSD, and Sleep: Cannabinoid Evidence Remains Weak

Cannabinoids Had Weak Evidence for Mental Disorders

TL;DR: A 2026 review in The Lancet Psychiatry found that randomized-trial evidence remains too weak to support routine cannabinoid treatment for common mental disorders. Key Findings 54 RCTs, 2,477 participants total: Sounds substantial — until split across many disorders, compounds, doses, and outcomes. Most comparisons end up underpowered. No support for the most common use …

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