TL;DR: A 2026 preprint in medRxiv warned that a standard Alzheimer’s disease biomarker-clock analysis can create a countdown paradox, where later biomarker-clock ages appear linked to faster mild cognitive impairment onset because of the way remaining time is calculated. Key Findings 100% false positives in simple null simulations: The standard countdown analysis rejected the null …
TL;DR: A 2026 review and activation-likelihood estimation study in European Journal of Pain found that the dorsolateral prefrontal cortex (dlPFC), a frontal control region, was repeatedly engaged in acute pain, chronic pain, and placebo analgesia, mainly across Brodmann areas 8, 9, and 46. Key Findings 138 studies included: The review screened 4810 deduplicated records and …
TL;DR: A 2026 study in Signal Transduction and Targeted Therapy engineered a modified inhibitory DREADD receptor called GRANPA so the over-the-counter antihistamine diphenhydramine could switch off targeted brain circuits and reduce seizure activity in mouse models. Key Findings Two added receptor mutations: The lead GRANPA receptor combined hM4Di with S85V and Y416F mutations to improve …
TL;DR: A 2026 randomized follow-up study in Maternal & Child Nutrition found no overall hair-cortisol difference at ages 9-11 after early-life small-quantity lipid-based nutrient supplementation, but children whose mothers had 0-5 years of schooling had lower cortisol if they received SQ-LNS. Key Findings No overall cortisol shift: Usable hair cortisol data from 680 children showed …
TL;DR: A 2026 preprint in medRxiv linked a higher 24-hour urinary sodium-to-potassium ratio with deep white matter lesions on brain MRI in older Japanese adults, with the association appearing to depend more on lower potassium excretion than on sodium alone. Key Findings Urine balance was matched to MRI lesions: The analysis included 296 adults from …
TL;DR: A 2026 study in Communications Medicine reported that artificial intelligence (AI) and multi-contrast MRI post-processing could reveal cortical lesions in multiple sclerosis trial scans that standard MRI review usually misses. Key Findings 80-person methods subset: Researchers analyzed 80 people with primary progressive multiple sclerosis from the phase 3 ORATORIO trial, then trained additional models …
TL;DR: A 2026 Nature Communications study found that chronic tumor necrosis factor alpha (TNF-alpha), an inflammatory cytokine, pushed human hippocampal progenitor cells toward type I interferon activity, lower neuroblast formation, and CXCR3-dependent T-cell recruitment. Key Findings 0.1-1 ng/ml TNF-alpha: The key experiments used chronic low-dose TNF-alpha exposures that the researchers considered biologically relevant for inflammatory …
TL;DR: A 2026 study in the European Journal of Nuclear Medicine and Molecular Imaging reported that adolescent bipolar II depression showed lower thalamic structural-functional connectivity coupling and glucose metabolism than adolescent major depressive disorder in a small exploratory positron emission tomography/MRI (PET/MRI) sample. Key Findings 28 adolescents scanned: The study compared 14 adolescents with bipolar …
TL;DR: A 2026 systematic review and meta-analysis in Journal of Medical Internet Research found that care robots showed a low-certainty reduction in neuropsychiatric symptoms, but six other pooled outcome domains did not reach statistical significance. Key Findings 34 randomized trials: The review included 34 randomized controlled studies across 17 countries, with 2,476 participants. 20 meta-analyzed …
TL;DR: A 2026 preprint in medRxiv reported that frailty and medical comorbidity predicted short-term outcomes more clearly than psychiatric history among older adults evaluated by consultation-liaison psychiatry teams in Spanish general hospitals. Key Findings 465 older inpatients: The prospective OLD-3 cohort included adults aged 65 years and older referred to consultation-liaison psychiatry in 10 Spanish …
