睡眠之谜

   量子资源网 提供本片资源  　　NOVA: Mysteries of Slee Like virtually every other animal, humans need slee to survive. But why? What do we gain from sending nearly a third of our lives in such a defenseless state? And what#39s at stake if we slee oorly? The functions of slee have long been something of a mystery. But now scientists are eering dee into the brain to see what haens while we snooze. One study reveals that well-timed bursts of ink noise can nudge a erson#39s brain waves, extending eriods of slow-wave, or dee, slee. And toddlers learning new words show that taking even a short na after learning something new can hel the information stick. And when it comes to sleeing oorly, it may turn out that having interruted slee can be just as harmful as missing slee altogether. As scientists come to understand the owerful role that slee -- or lack of it -- lays in everything from memory to trauma to emotion regulation, one thing is clear: This biological function is as crucial as it is comlex.