During sleep, your brain rests.
The body rests during sleep. Despite this fact, the brain remains active, gets "recharged," and still controls many body functions including breathing. When we sleep, we typically drift between two basic sleep states, Rapid Eye Movement (REM) sleep and Non-REM (NREM) sleep, which consists of Sleep Stages 1 through 4.
Yawning means laziness, sleepiness and boredom
If you wake up in the middle of the night, it is best to lie in bed trying to fa...
Daytime sleepiness always means a person is not getting enough sleep.
Insomnia is characterized only by difficulty falling asleep.
You can "cheat" on the amount of sleep you get.