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What is sleep

What is Sleep?

It is a temporary reversible state of unconsciousness. This is not same all though the time but it is a cyclical pattern of events. The sleep has two phases:

  • NREM, Non Rapid Eye Movement
  • REM, Rapid Eye Movement
Most dreams occurs during REM sleep.

Alcohol and other sedatives decrease this phase of sleep. REM is approximately 25% of our total sleep.

Infant has total of 16 hours of sleep out of which 50% is REM but as the age advances there is decrease in total sleep time and also decrease in REM to 25%.


Sleep disordered breathing

The spectrum of this disorder may range from