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Your Brain Sleeps with One Eye Open in New Places | HowStuffWorks NOW

Key Facts In This Video

  1. The default mode network of the brain's left hemisphere remains more active during the slow-wave phase of sleep the first night in a new place. 00:39

  2. The default mode network is the brain region concerned with introspective chatter -- the part responsible for the worried, depressive voice in your head. 00:49

  3. Marine mammals exhibit unihemispheric slow-wave sleep, essentially resting the brain's halves in shifts. 01:38