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.
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:
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.