Neuroscience

ADHD Symptoms Linked to Cannabis Use Through CNR1-Rich Inhibitory-Control Regions

July 10, 2026 by BrainASAP

TL;DR: A 2026 medRxiv preprint linked greater attention-deficit/hyperactivity disorder (ADHD) symptom scores in college students to reduced stop-signal functional MRI (fMRI) activation in cannabinoid receptor 1 (CB1R)-rich brain regions, and that reduced activation predicted heavier cannabis-use trajectories over 4 years. Key Findings ADHD-cannabis trajectory: Researchers analyzed cannabis-use trajectories in 466 first-year college students aged 18-19, …

Review Identified Different Depression Treatment Targets in Alzheimer’s and Parkinson’s

July 10, 2026 by BrainASAP

TL;DR: A 2026 narrative review in Molecular Psychiatry argues that depression in Alzheimer’s disease and Parkinson’s disease follows disease-specific brain mechanisms, while standard antidepressant evidence remains weak in these neurodegenerative populations. Key Findings 42% in Alzheimer’s disease: The review cites depressive syndromes affecting about 42% of patients with Alzheimer’s disease and 35% of patients with …

Endocannabinoid CB-1 Receptor Blockade and CBD Reduced Animal Alcohol Intake

July 10, 2026 by BrainASAP

TL;DR: A 2026 systematic review and meta-analysis in Molecular Psychiatry found that CB-1 receptor blockade and cannabidiol reduced alcohol intake in animal models, but human alcohol-use-disorder evidence remained inconsistent and too thin to support a treatment claim. Key Findings 63 studies reviewed: Researchers synthesized 44 preclinical studies and 19 clinical or human experimental studies of …

Olanzapine-Samidorphan Linked to Depressive Symptoms in Case Report

July 10, 2026 by BrainASAP

TL;DR: A 2026 study in International Clinical Psychopharmacology described a 40-year-old man whose dysphoria, anhedonia, amotivation, and fatigue appeared soon after olanzapine was changed to olanzapine-samidorphan and resolved after he returned to olanzapine alone. Key Findings One-patient case report: The report followed a 40-year-old man after first psychiatric hospitalization, so the evidence is a clinical …

Tubulin Shifted Tau and Alpha-Synuclein Condensates Toward Microtubules

July 9, 2026 by BrainASAP

TL;DR: A 2026 study in Nature Communications reported that tubulin redirected Tau and alpha-synuclein condensates toward microtubule-building states, while tubulin loss pushed the same protein system toward toxic oligomers in cell models. Key Findings 36-hour shift: Tau and alpha-synuclein condensates formed stable high-molecular-weight oligomers and Tau:alpha-synuclein heterodimers after aging without tubulin. 10-micromolar tubulin: Adding tubulin …

Migrating Developing Neurons Generated Repairable DNA Breaks

July 9, 2026 by BrainASAP

TL;DR: A 2026 mouse and cell study in Nature found that developing neurons can generate DNA double-strand breaks while moving through narrow brain tissue during migration, then usually repair those breaks without cell death. Key Findings Developing neurons: The study tracked cerebellar granule neurons, Purkinje cells, and cortical neurons during normal brain development. Confined migration: …

Medicaid and Benzodiazepines Predicted Persistent Opioid Use After Surgery

July 9, 2026 by BrainASAP

TL;DR: A 2026 systematic review and meta-analysis in Pain Medicine found that Medicaid enrollment and preoperative benzodiazepine use had the largest pooled associations with new persistent opioid use after surgery among opioid-naive US adults. Key Findings 27 cohort studies: The review included US adult surgical studies that separated opioid-naive patients from those using opioids before …

Home Exercise Trial Will Test Parkinson Cognition and Biomarkers

July 9, 2026 by BrainASAP

TL;DR: A 2026 protocol in JMIR Research Protocols describes EXCEL-PD, a randomized trial testing whether 26 weeks of virtually supervised home endurance and resistance exercise is feasible, safe, and biologically informative for people with Parkinson disease. Key Findings Home trial design: EXCEL-PD randomizes 31 planned participants with Parkinson disease to home-based exercise or waitlist usual …

30 mg 2C-B Matched MDMA Drug Intensity but Lasted Less Than Psilocybin

July 9, 2026 by BrainASAP

TL;DR: A 2026 study in Neuropsychopharmacology found that 30 mg 2C-B produced acute subjective effects in healthy adults that were similar in overall intensity to 125 mg MDMA, shorter and less distressing than 25 mg psilocybin, and less cardiovascularly stimulating than MDMA. Key Findings Crossover comparison: The double-blind study tested 10, 20, and 30 mg …

Karyoptosis Linked Proteotoxic Stress to Neurodegeneration

July 9, 2026July 9, 2026 by BrainASAP

TL;DR: A 2026 study in Nature Communications found that proteotoxic stress can push neurons into karyoptosis, a cell-death pathway marked by nuclear lamina breakdown, nuclear-material expulsion, and dementia-linked tissue signatures. Key Findings Karyoptosis was induced by protein-clearance stress: Blocking autophagic lysosomal clearance caused LaminB1 disruption, nuclear-shape loss, cytoplasmic nuclear material, and later cell death. p38-LaminB1 …

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