The Yale Study That Tracked 270 Adults For 17 Years Reveals Why Sleep Trackers Miss Brain Protection
A 2025 study from Yale School of Medicine followed 270 community-dwelling adults for 13–17 years, combining overnight polysomnography with high-resolution MRI to assess how sleep architecture relates to brain structure over time. Lower REM sleep percentage predicted smaller brain volume in the inferior parietal lobule and precuneus—regions that show early vulnerability in Alzheimer’s disease—independent of […]