what is the full definition of sleep?

What are some sleep disorders?

3 answers

A period of intense brain activity often associated with dreams; named for the rapid eye movements that occur during this time. Also called dreaming sleep.

And here's a whole list of sleeping disorders:

Sleep apnea - is a serious condition where the sufferer stops breathing multiple times per night.

Narcolepsy - is the condition where sufferers fall asleep unexpectedly and sometime inapproriately.

Insomnia - is a condition where the sufferer cannot get to sleep or get enough restful sleep during the night. Sponsored Link: End Insomnia & Sleep Problems - Tonight!

Night terrors - as opposed to night-mares, night tremors are more intense. Mainly in children who wake sitting upright and screaming.

Restless leg syndrome - is a condition where the suffer has an overwhelming urge to move their legs. In some cases there maybe involuntary jerking of the limbs.

Bed wetting - is more prevalent in children and can be related to the child's breathing.

Sleep walking - a phenomenon that ranges in duration and intensity and is thought to effect upt o 10% of the population.

Sleep Hyperhydrosis - more commonly known as Night Sweats, this condition can be brought on by hormone changes, food, drugs and fevers.
This is an excellent site dedicated solely to sleep.

http://www.sleepfoundation.org/site/c.huIXKjM0IxF/b.2417141/k.2E30/The_National_Sleep_Foundation.htm

Definition
A natural periodic state of rest for the mind and body, in which the eyes usually close and consciousness is completely or partially lost, so that there is a decrease in bodily movement and responsiveness to external stimuli. During sleep the brain in humans and other mammals undergoes a characteristic cycle of brain-wave activity that includes intervals of dreaming.
I searched Google under the key words "sleep disorders" to get these possible sources:

http://www.sleepnet.com/
http://www.nlm.nih.gov/medlineplus/sleepdisorders.html
http://en.wikipedia.org/wiki/Sleep_disorder
http://www.neurologychannel.com/sleepdisorders/index.shtml
http://www.sleepdisordersguide.com/

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.

I hope this helps a little more. Thanks for asking.