'Sleep is a naturally recurring state of mind and body, characterized by altered consciousness, relatively inhibited sensory activity, reduced muscle activity and inhibition of nearly all voluntary muscles during rapid eye movement (REM) sleep, and reduced interactions with surroundings.

Sleep occurs in repeating periods, in which the body alternates between two distinct modes: REM sleep and non-REM sleep. Although REM stands for "rapid eye movement", this mode of sleep has many other aspects, including virtual paralysis of the body.'

Source: wikipedia.org

Here is a Learning Path about sleep. You can learn what is sleep, benefits of sleep, how to sleep well and more...

Let's talk smart about  'Why Do We Need Sleep?'


Photo: Pixabay