Researchers found that your brain’s activity during sleep could reveal whether it’s aging faster than you are, potentially signaling an increased risk of dementia. A study led by scientists at the University of California, San Francisco, used machine learning to analyze EEG recordings from around 7,000 adults. They discovered that individuals with a brain age significantly older than their chronological age had a nearly 40% higher risk of developing dementia for every additional 10 years of brain aging.

This finding is crucial for anyone looking to maintain cognitive health as they age. If your brain appears older than it should, it may be an early warning sign, allowing you to take proactive steps to protect your memory and mental function. The study included participants aged 40 to 94, none of whom had dementia at the start. Over the monitoring period of 3.5 to 17 years, about 1,000 individuals developed dementia, highlighting the potential of these brain age assessments to identify risk before symptoms arise.

The research is still in the early stages, relying on EEG data to estimate brain age and its connection to dementia risk. While the results are promising, they are based on a large cohort study that provides strong evidence but is not yet a definitive clinical tool. Future advancements could lead to wearable devices that monitor brain activity during sleep, offering a non-invasive way to assess dementia risk. In the meantime, focusing on improving sleep quality and overall health may help support brain aging.

Source: University of California - San Francisco