Book Definition: A condition of increased REM sleep (spend more time in REM sleep than usual) caused by REM-sleep deprivation. It shows that sleep satisfies the basic biological need for REM.

In Your Own Words

  • An increase in REM sleep following a night of little REM sleep.
  • When you lose REM sleep, or do not receive enough in one night, then the next night you will spend much more time in REM sleep than usual
  • The body needs a certain amount of REM sleep. If it doesn't recieve it, then your body will have more period of REM sleep the next time you sleep


  • If you pull an all-nighter or cut your hours of sleep drastically, the next night, you will fall asleep and experience REM sleep immediately. This is to make up for the lost REM sleep of the previous night.
  • If you stay up all night studying for an exam and barely sleep, the next time you sleep your body will immediately try to catch up on REM sleep which will cause you to go into REM rebound.
  • When traveling in a car throughout the night you are unable to sleep or else your car will wreck. This means the next night when you sleep you will experience much more REM sleep to make up for the sleep lost.
  • When you travel, and you get jet lag, and then when you come back home, you will catch up on your REM sleep which will make up for your sleep loss.

Additional Resources