Brain Age From Sleep EEG Patterns and Dementia Risk

A recent study published in JAMA Network Open used a machine learning model to estimate brain age from complex sleep brain wave patterns obtained from over 7,000 participants. It found that more rapid brain aging relative to actual chronological age was associated with an increased risk of dementia .

Previous studies investigating the association between broader sleep patterns, like sleep quantity and sleep quality, have yielded inconsistent results. In contrast, the present study assessed the granular differences in sleep wave patterns that are more closely linked to brain function and dementia risk.

Study co-author Yue Leng , PhD, an associate professor of psychiatry at the University of California, San Francisco, told Medical News Today that: “This study shows that sleep is not just restorative—it also provides a powerful window into brain health.