Brain scan patterns capture Alzheimer’s variation in people
An observational analysis of 1,250 people linked patterns of protein buildup and brain shrinkage to cognition and diagnostic changes, with validation in a second cohort.
Our read
Biomarkers- Studied:
- Preprint: cohort study of 1,250 people with or without cognitive impairment (Independent replication)
- What changed:
- Pattern scores were associated with specific thinking abilities and changes in diagnosis, and linked to cognitive decline
- The catch:
- The study did not measure whether using the model would improve care
- Why it’s aging research:
- It bears on staying healthy in midlife and later life.
Editor of record: Boris Djordjevic · AgingResearch.News
In an observational study of 1,250 people with unimpaired cognition, mild cognitive impairment or Alzheimer’s dementia, researchers combined brain scans to map individual differences. They developed the model in 829 participants from the Alzheimer’s Disease Neuroimaging Initiative and validated it in 421 participants from the Open Access Series of Imaging Studies. The scans measured amyloid-beta and tau, two proteins involved in Alzheimer’s disease, and brain shrinkage.
The model identified patterns linking these measurements across brain regions. Tau variation featured more prominently in people without cognitive impairment. In people with impairment, patterns combined both proteins with brain shrinkage. Pattern scores were associated with specific thinking abilities and changes in diagnosis. Applying the patterns to the independent cohort also linked them to cognitive decline.
Why it matters
Alzheimer’s disease involves brain changes that vary between people. The authors propose using these patterns alongside existing disease staging to aid clinical assessment and help select clinical trial participants.
Caveats
These observational associations do not show that one brain change caused another or that using the model would improve care. The findings come from a preprint that has not been peer-reviewed.
The paper
Montreal Neurological Institute and Hospital
medRxiv, May 26, 2026, Open access, Preprint, not yet peer-reviewed
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