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.
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..
Brain basics: understanding sleep, Dreaming and rem sleep. we typically spend more than 2 hours each night dreaming. scientists do not know much about how or why we dream. sigmund freud, who.
Sleep health: 9 surprising reasons sleep, Sufficient sleep might offer a big boost for your health, mood, sex life, weight control, and more..
Sleep - Wikipedia, the free encyclopedia
Brain basics: understanding sleep, Dreaming rem sleep. typically spend 2 hours night dreaming. scientists dream. sigmund freud, .
