* Vital information about sleep for everybodyProf. Okan Bolukbası, M.D., from Neurology Department of Okan University Hospital furnished us with important details about sleep in an interview for Sleep Well magazine. It is very difficult to describe sleep in scientific terms. Until the 1950s, many people supposed sleeping was an inactive part of our daily life. But, now we know that our brain is very active during sleep. Moreover, we are confident that sleep affects our physical and mental health.