研究表明睡眠清除大脑垃圾
<p>小白鼠研究表明：睡眠时大脑会大量排出有毒垃圾，包括可致老年痴呆症的蛋白质。彻夜不眠会阻止大脑有效地排出这些有毒物质，这也解释了为什么缺乏睡眠会迅速导致严重后果。睡眠太少会导致精神模糊、狂妄，偏头痛和其他脑部疾病的可能性也会增大。</p><p><span word="While">While</span> <span word="we">we</span> <span word="are">are</span> <span word="asleep">asleep</span>, <span word="our">our</span> <span word="bodies">bodies</span> <span word="may">may</span> <span word="be">be</span> <span word="resting">resting</span>, <span word="but">but</span> <span word="our">our</span> <span word="brains">brains</span> <span word="are">are</span> <span word="busy">busy</span> <span word="taking">taking</span> <span word="out">out</span> <span word="the">the</span> <span word="trash">trash</span>.</p><p><span word="A">A</span> <span word="new">new</span> <span word="study">study</span> <span word="has">has</span> <span word="found">found</span> <span word="that">that</span> <span word="the">the</span> <span word="cleanup">cleanup</span> <span word="system">system</span> <span word="in">in</span> <span word="the">the</span> <span word="brain">brain</span>, <span word="responsible">responsible</span> <span word="for">for</span> <span word="flushing">flushing</span> <span word="out">out</span> <span word="toxic">toxic</span> <span word="waste">waste</span> <span word="products">products</span> <span word="that">that</span> <span word="cells">cells</span> <span word="produce">produce</span> <span word="with">with</span> <span word="daily">daily</span> <span word="use">use</span>, <span word="goes">goes</span> <span word="into">into</span> <span word="overdrive">overdrive</span> <span word="in">in</span> <span word="mice">mice</span> <span word="that">that</span> <span word="are">are</span> <span word="asleep">asleep</span>. <span word="The">The</span> <span word="cells">cells</span> <span word="even">even</span> <span word="shrink">shrink</span> <span word="in">in</span> <span word="size">size</span> <span word="to">to</span> <span word="make">make</span> <span word="for">for</span> <span word="easier">easier</span> <span word="cleaning">cleaning</span> <span word="of">of</span> <span word="the">the</span> <span word="spaces">spaces</span> <span word="around">around</span> <span word="them">them</span>.</p><p><span word="Scientists">Scientists</span> <span word="say">say</span> <span word="this">this</span> <span word="nightly">nightly</span> <span word="self">self</span>-<span word="clean">clean</span> <span word="by">by</span> <span word="the">the</span> <span word="brain">brain</span> <span word="provides">provides</span> <span word="a">a</span> <span word="compelling">compelling</span> <span word="biological">biological</span> <span word="reason">reason</span> <span word="for">for</span> <span word="the">the</span> <span word="restorative">restorative</span> <span word="power">power</span> <span word="of">of</span> <span word="sleep">sleep</span>.</p>
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