REMembering SLEEP

There are tw o types of sleep: REM and non-REM. For the first 90 minutes of your sleep, you experience non-Rapid Eye Movement (NREM) sleep. Here you drift from consciousness to total unconsciousness. REM sleep then follows. This is the dreaming stage.
The NREM-REM cycle is repeated six to 10 times throughout the night. Do you know that:
* Bed-wetting, snoring, sleepwalking, and night terrors occur during stage IV of NREM sleep?
* NREM sleep relaxes the body, while REM sleep relaxes the mind?
* When you wake up in the middle of a REM sleep, you will remember your dream, but when you wake up during NREM sleep you won't even know you dremed?
* Lack of REM sleep is more upsetting than lack of NREM sleep? In a study conducted by N. R. Culler and H. B. Cohen people who had been deprived of REM sleep for days became less well-integrated and effective. They also became confused and suspicious of other people. Thus, they withdrew from society. Moreover, sleep-deprived individuals appear anxious, insecure, irritable and have a marked increase in appetite leading to weight gain.