Brain imaging could reveal early changes linked to Alzheimer’s disease.

MRI scans show that the thickness of the outermost layer of the brain changes before the onset of the disease, detectable up to seven years prior, researchers reported August 19 in Nature Neuroscience . Though the differences are too subtle to use as a diagnostic tool, they could help researchers understand the early stages of Alzheimer’s.

Alzheimer’s disease is the most common form of dementia and can cause memory loss, disorientation and behavior shifts. But changes in the brain can occur long before these cognitive symptoms appear. Sticky protein fragments called…

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