Brain Changes Detected Years Before Alzheimer's Markers
Researchers found cortical thickening on MRI scans that appears up to seven years before high amyloid levels.
Updated on Sept. 28, 2026 in Alzheimer’s
Live Poll
Does research into early brain markers increase your confidence in future Alzheimer's diagnostic testing?
Scientists have observed thicker brain cortices in individuals who later developed high levels of amyloid-beta, a key protein associated with Alzheimer's disease. These structural differences were visible on MRI scans up to seven years before the protein was detected.
Why it matters
Understanding these early brain changes may improve how scientists assess the efficacy of future treatments before significant cognitive decline occurs. These findings offer a new window into the long-term progression of amyloid-beta accumulation.
This longitudinal cohort study analyzed MRI scans from more than 1,000 participants to track brain changes. Researchers observed that the cortex, which averages 2.5 millimetres in thickness, thickened at a different rate in individuals who later developed high amyloid-beta levels.
The players
Barcelona Supercomputing Center
A research institution specializing in advanced computational science and large-scale data analysis.
University College London
A public research university known for its extensive contributions to clinical neurology and neuroscience.
The details
The cortex generally thins as individuals age, but this study found that in people who eventually develop high amyloid-beta, this thinning process occurs more slowly, resulting in a temporary thickening. Researchers suggest that inflammation triggered by the earliest accumulation of amyloid-beta might explain this structural response. These minute differences, measured in hundredths of a millimetre, were not linked to any immediate memory problems in participants.
Timeline
Differences were visible up to 7 years before amyloid-beta detection.
Health Landscape
This study advances the methodology used by the Alzheimer's Disease Neuroimaging Initiative by identifying structural biomarkers that predate current protein-detection standards. It shifts the focus of research from symptomatic decline to the early, pre-clinical structural changes in the brain.
These findings are currently limited to research settings and do not change standard diagnostic procedures in your doctor's office. If you are concerned about cognitive health, it is worth discussing your specific risk factors and any memory changes with your primary care physician.
The takeaway
Early structural brain changes appear to precede amyloid-beta detection, marking a new potential target for long-term monitoring. Patients interested in brain health should focus on established cardiovascular and lifestyle habits known to support cognitive longevity while researchers continue to study these markers.
Further reading
For more on the latest research into early detection, visit our Alzheimer’s section.
Source note: This article includes information reported by Bdnews24.
Live Poll
Does research into early brain markers increase your confidence in future Alzheimer's diagnostic testing?
