Sleep - wikipedia, free encyclopedia, Sleep is a naturally recurring state of mind characterized by altered consciousness, relatively inhibited sensory activity, inhibition of nearly all voluntary muscles.
Brain basics: understanding sleep, A comprehensive resources guide about understanding sleep, compiled by ninds, the national institute of neurological disorders and stroke..
Stages sleep: rem -rem sleep cycles - webmd, A lot happens in your body while you sleep. when you get your zzzs, you cycle between rem and non-rem sleep. rem stands for rapid eye movement..
National sleep foundation - sleep research & education, Explore the national sleep foundation, your source for sleep research and education from sleep disorders and problems to polls and maximizing energy..
Sleep - Wikipedia, the free encyclopedia
Stages sleep: rem -rem sleep cycles - webmd, A lot body sleep. zzzs, cycle rem -rem sleep. rem stands rapid eye movement..
