there are two types of sleeps theres a heavy sleep and a light sleep
3/13/2012 jhh: REM sleep is NOT deep sleep. In fact, it is the lightest stage of sleep. In order from awake to deep sleep: AWAKE, REM, LIGHT, DEEP. Deep sleep and REM sleep are the most important...
Yes. You need a minimum of 8 hours to remain helathy.
In people prone to sleep walking, sleep disturbance, including sleep deprivation, can make sleep walking more likely.
Sleep spindles occur during stages 2 of sleep, they are brief bursts of frequency in our brain wave patterns