Sleeping brains take a bath

As mice sleep, brain fluid washes away the junk that built up between cells while awake

By Stephen Ornes, 22:42 PM November 8, 2013

All day long, litter builds up between brain cells. A study now finds that trash is washed away by fluid in the brain during sleep. That’s potentially good news because such garbage includes a substance linked to Alzheimer’s disease.


Evidence of this brain-washing emerged in a study on mice. But the finding gives researchers an idea of what may happen in the brains of sleeping people, too.


Chiara Cirelli called the new findings “eye-opening and intriguing.” A sleep researcher at the Universit...

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