Brain Changes Detected Years Before Alzheimer’s
Researchers identified cortical thickening in patients years before high amyloid-beta levels appeared.
Updated on Sept. 28, 2026 in Alzheimer’s
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Scientists have discovered that cortical thickening is visible in MRI scans up to seven years before the detection of high amyloid-beta levels. This finding suggests a potential new biomarker for early brain changes associated with Alzheimer’s.
Why it matters
Understanding these early structural shifts helps clarify the role of inflammation in amyloid-beta accumulation. This could enable clinicians to better assess how emerging treatments impact disease progression.
The study tracked cortical thickness variations measured in hundredths of a millimetre across 1,000 participants. These changes remained distinct from memory-related performance metrics throughout the research period.
The players
Barcelona Supercomputing Center
This is a major research institution that provides high-performance computing resources to advance scientific discovery.
University College London
This is a prominent public research university in the United Kingdom known for its significant contributions to medical and neurological research.
The details
Researchers at the Barcelona Supercomputing Center and University College London found that the cortex thins more slowly in individuals who eventually develop high amyloid-beta levels. The study noted that this thickening is likely linked to inflammation occurring years before clinical detection.
Timeline
Cortical differences were visible 7 years before amyloid-beta detection.
The Big Picture
This study shifts the trajectory of the Amyloid Cascade Hypothesis by documenting structural changes occurring well before the emergence of protein plaques. The findings suggest that inflammation markers could serve as earlier indicators than amyloid-beta detection alone.
This research may eventually lead to earlier clinical monitoring for high-risk individuals before memory problems emerge. Patients should discuss the implications of new diagnostic imaging tools with their neurologists as these methods move toward clinical implementation.
The takeaway
While cortical thickening is a promising early sign, it currently lacks a direct link to immediate memory impairment. Identifying these subtle markers remains a focus for researchers aiming to improve long-term preventative care.
Further reading
For more on ongoing advancements in brain disease detection, visit the Alzheimer’s section.
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Does research into early brain markers increase your confidence in future Alzheimer's diagnostic testing?
