Catching up on lost sleep

There's no doubt that sleeping just four hours a night catches up to people within a few nights, leading to impairments of attention, learning and memory and worse performance in school and at work. Matt Bianchi, assistant professor of neurology at Massachusetts General Hospital, and Charles Czeisler, Frank Baldino, Jr., Ph.D. Professor of Sleep Medicine at Brigham and Women's Hospital, are quoted.

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