A simple overnight sleep test combined with artificial intelligence may one day identify people at higher risk of developing dementia years before memory problems begin.
Researchers developed a machine learning-based tool that estimates a person's "brain age" using sleep electroencephalography (EEG), a test that records electrical activity in the brain during sleep. They found that participants whose brains appeared older than their actual age were significantly more likely to develop dementia during follow-up, suggesting the technology could eventually become an early digital marker for cognitive decline.
