Autistic young people who also have ADHD showed weaker resting brain connections than autistic peers without ADHD, according to a 2026 brain-imaging study of 69 people.1 Most autism-linked differences were shared by both autistic groups, but the extra ADHD diagnosis came with its own pattern, especially in a brain area that helps with attention and …
Neurons that tracked a remembered smell turned up all over the mouse brain in a newly released dataset of 33,028 neurons recorded from 40 mice. The 2026 data paper makes those recordings free for other scientists to study how working memory works.1 Research Highlights Memory neurons in every well-sampled region: in all 34 brain regions …
Mice that only watched another mouse being attacked developed anxiety- and depression-like behavior, but milder and narrower changes than mice that were attacked themselves, according to a 2026 study in male mice.1 Research Highlights Both kinds of stress caused social avoidance: after 14 days, attacked mice and witness mice both spent less time near a …
A 2026 quantitative MRI preprint reanalyzed 138 healthy adults and found that multivariate modeling detected coordinated age-related shifts across myelin-sensitive, iron-sensitive, and water-sensitive brain maps.1 The signal was broad, but split-half validation weakened the result enough to keep it in the measurement-method lane rather than the clinical-test lane. Research Highlights 138 adults were reanalyzed: The …
A 2025 Nature Aging study found that hippocampal ferritin light chain 1 (FTL1) rose with age in mouse neurons, tracked poorer cognition, and became experimentally reversible in old mice. This is an animal-mechanism result, not a human anti-aging treatment.1 Research Highlights FTL1 rose in aged hippocampus: Western blot data showed higher hippocampal FTL1 in aged …
A 2026 Nature Communications mouse study tested 7,736 possible connections in the hippocampal CA3 memory circuit and found a developmental shift from dense early wiring toward sparse structured adult wiring: corrected CA3-to-CA3 connection probability fell from 6.37% at P7-8 to 2.17% at P45-50.1 The finding supports a circuit-level version of memory maturation, not a claim …
A 2026 systematic review argues that catatonia should be read as a limbic-cortical circuit syndrome, with motor shutdown tied to brain systems for threat, salience, motivation, and emotional regulation. Research Highlights 20 studies met criteria: the 2026 review screened 1,792 records, assessed 54 full texts, and included 20 articles: 13 observational studies and 7 case …