10 Interesting Facts About Sleeping

10 Interesting Facts About Sleeping

  1. When you are asleep, your body functions go on as normal – even your brain goes on receiving sense signals. But your body may save energy and do routine repairs.
  2. Lack of sleep can be dangerous. A newborn baby needs 18 to 20 hours sleep a day. An adult needs 7 to 8.
  3. Sleep is controlled in the brain stem (see the brain). Dreaming is stimulated by signals fired from a part of the brain stem called the pons.
  4. When you are awake, there is little pattern to the electricity created by the firing of the brain’s nerve cells. But as you sleep, more regular waves appear.
  5. While you are asleep, alpha waves sweep across the brain every 0.1 seconds. Theta waves are slower.
  6. For the first go minutes of sleep, your sleep gets deeper and the brain waves become stronger.
  7. After about 90 minutes of sleep, your brain suddenly starts to buzz with activity, yet you are hard to wake up.
  8. After 90 minutes of sleep, your eyes begin to flicker.
  9. REM sleep is thought to show that you are dreaming.
  10. While you sleep, ordinary deeper sleep alternates with spells of REM lasting up to half an hour.