TL;DR: A 2026 scoping review in Nature and Science of Sleep found that sleep bruxism and gastroesophageal reflux disease were positively associated across 7 adult human studies, but the evidence remains too heterogeneous to prove causality. Key Findings 174 records screened: Database searches in PubMed, Scopus, and Web of Science narrowed 174 references to 7 …
TL;DR: A 2026 rat study in Neuropsychopharmacology reported that repeated semaglutide treatment reduced cocaine-vs-food choice in male and female rats, supporting further clinical testing for cocaine use disorder rather than proving human benefit. Key Findings 5-day treatment: Rats received repeated semaglutide treatment across 5 days rather than a single acute dose. Two active doses: Both …
TL;DR: A 2026 study in BMC Psychiatry used Taiwan insurance records to find that dementia in people with schizophrenia was tied more strongly to age and linked medical comorbidities than to antipsychotic exposure after multivariable adjustment. Key Findings 147 dementia cases: Researchers compared 147 people with schizophrenia who developed dementia with 882 sex- and diagnosis-year-matched …
TL;DR: A 2026 sham-controlled study in BMC Psychiatry found that one 15-minute session of 1.5 mA anodal transcranial direct current stimulation (tDCS) over the right dorsolateral prefrontal cortex did not improve visuospatial or verbal working memory in clinically stable schizophrenia patients. Key Findings 27 schizophrenia patients: The final analysis included 14 men and 13 women …
TL;DR: A 2026 study in Journal of Korean Medical Science found that resistance exercise was more consistently associated with lower depression and anxiety scores than aerobic exercise in Korean adults, but the cross-sectional design means the study cannot prove exercise caused the mental-health difference. Key Findings Resistance exercise had the strongest association with lower Patient …
TL;DR: A 2026 preprint in medRxiv used whole-genome sequencing in two families with many obsessive-compulsive disorder (OCD) cases and prioritized rare variants in NPY5R, DLGAP1, and MAPK8IP3, but the findings still need replication and functional testing. Key Findings Two densely affected families: Researchers sequenced 25 people from two multiplex OCD pedigrees, meaning families with several …
TL;DR: A 2026 preprint posted to medRxiv found that intermittent theta-burst transcranial temporal interference stimulation (iTBS-tTIS), a noninvasive electrical method aimed at the right putamen, lowered left-sided Parkinson’s motor scores during stimulation in 19 patients. Key Findings 19 Parkinson’s patients and 19 healthy controls completed a randomized, double-blind crossover stimulation study. MDS-UPDRS III, the motor …
TL;DR: A 2026 medRxiv preprint found that older adults with Montreal Cognitive Assessment (MoCA)-defined mild cognitive impairment had less coordinated pulse-wave responses during a cognitive challenge than cognitively intact older adults. Key Findings Community cognitive-aging sample: The southern Taiwan dataset included 101 older adults: 12 reference participants, 50 people in a MoCA-defined mild cognitive impairment …
TL;DR: A 2026 Molecular Psychiatry ENIGMA mega-analysis found that medication status in bipolar disorder was linked to subtle differences in subcortical brain volume, with antiepileptic and antipsychotic exposure most consistently tied to smaller hippocampal and thalamic volumes. Key Findings 6,729-person ENIGMA sample: Researchers pooled MRI data from 2,664 people with bipolar disorder and 4,065 controls …
TL;DR: A 2026 cross-sectional study in Nature and Science of Sleep linked second-trimester sleep disturbance, measured with the Pittsburgh Sleep Quality Index (PSQI), to depressive symptoms, vomiting, diet quality, and several birth-outcome patterns in 2,210 pregnant women in Wuhan, China. Key Findings Sleep disturbance affected 18.14%: 401 of 2,210 pregnant women had PSQI scores above …
