For individuals who drink before sleeping, alcohol initially acts as a sedative -- marked by the delta frequency electroencephalogram (EEG) activity of Slow Wave Sleep (SWS) -- but is later associated ...

While we sleep, one kind of slow brain wave helps to reinforce memories, but a competing wave weakens them. The brain collects far more memories than it can keep. We absorb new information throughout ...

During sleep, the brain cleans itself, turning up the flow of cerebrospinal fluid through the gray matter parenchyma to wash away waste. What powers this flow? In the February 28 Nature online, ...