Sleeping, What is it About? All of us know what sleep is. We know how it feels. The meaning of the word is generally not questioned in ordinary conversation, and we do not have to look it up in the dictionary. But no one knows what sleep really is. Once we get beyond the simple level of recognizing a superficially quiet state that is very different from wakefulness, we find that the major questions about …showed first 75 words of 515 total…

…showed last 75 words of 515 total…simply a state of inactivity which occurs passively when organs became fatigued in order they might rest, to a view of sleep as a complex state which is qualitatively, not just quantitatively, different from wakefulness and which is initiated and maintained by specific mechanisms. Although much progress has been made, the essential nature of sleep remains unresolved, and sleep scientists continue their work. Bibliography Retrieved April 29, 2001, from http://bisleep.medsch.ucla.edu/sleepsyllabus ------------------------------------------------------------------------ **Bibliography**