Brain Activity Patterns May Predict Alzheimer's Disease Years Before Memory Loss

Alzheimer's disease is a progressive neurological condition that affects memory, thinking and the ability to perform everyday activities. Changes in the brain can begin many years before a person develops noticeable symptoms.

The Stanford Medicine research investigated whether patterns of brain activity could provide early information about a person's vulnerability to cognitive decline.

Researchers first examined resting brain activity in adults aged 75 and above, including people diagnosed with Alzheimer's disease and individuals known as super-agers, whose memory performance remained unusually strong for their age.

Using these patterns, the team developed a scoring system that was subsequently applied to adults aged 55–70 who did not show obvious cognitive impairment.

The researchers found that more Alzheimer's-like brain activity patterns were associated with a greater likelihood of future cognitive decline, amyloid-beta plaque development and Alzheimer's diagnosis over the following 12 years. Patterns associated with super-agers were linked to greater resilience.

The research suggests that brain activity could potentially become an early biomarker for identifying people at risk of cognitive decline. However, the approach still requires further validation before it can be used as a routine clinical screening test.