Overview
- The PLOS Biology study from the IMT School in Lucca, published Tuesday, finds that immersive dreams can heighten the feeling of deep sleep even when brain activity looks more wake-like.
- Researchers monitored 44 adults with high-density EEG and woke them during N2 sleep, a non-REM stage, to collect dream reports and ratings of perceived sleep depth.
- Participants reported the deepest sleep after vivid, bizarre, or emotionally intense dreams, while minimal or thought-like experiences were linked to the shallowest sleep.
- Across the night, biological signs of sleep pressure fell, yet people said their sleep felt deeper as dream immersiveness increased.
- Experts say the lab study, which logged more than 1,000 awakenings across four nights, could improve how sleep is measured and explain why consumer trackers miss complaints, though it needs larger, clinical tests before it can guide care.