研究发现失眠者大脑可塑性更高
<p>最新研究显示，比起睡眠良好的人，失眠人群大脑的可塑性可能更强。</p><p>研究人员征集了28名成年受试者，用经颅磁刺激(<span word="TMS">TMS</span>)激活受试者脑中的运动皮质区域，这28人中，18人患有失眠症，10人没有失眠症。受试者收到刺激后四肢会向特定方向不自主运动。</p><p>研究人员在受试者四肢上绑定加速计测量运动幅度，接下来观察受试者在四肢不受控运动下，多久能学会往反方向控制四肢运动。研究人员说，在这种条件下，适应的越快，运动皮质的灵活度就越好。</p><p>研究人员开始还担心失眠患者的大脑会因休息不良难以控制四肢，但是试验结果却让人大跌眼镜。结果显示慢性失眠症患者适应地更快，因为他们的大脑有更强的可塑性。</p><p>失眠症状如何导致可塑性提高的联系还不能确定，科学家也不知道具体作用机制，也不清楚可塑性提高是否是失眠导致。</p><p><span word="Unable">Unable</span> <span word="to">to</span> <span word="sleep">sleep</span> <span word="at">at</span> <span word="night">night</span>? <span word="It">It</span> <span word="has">has</span> <span word="now">now</span> <span word="been">been</span> <span word="medically">medically</span> <span word="shown">shown</span> <span word="that">that</span> <span word="insomnia">insomnia</span> <span word="may">may</span> <span word="be">be</span> <span word="caused">caused</span> <span word="by">by</span> <span word="an">an</span> <span word="overactive">overactive</span> <span word="brain">brain</span>, <span word="according">according</span> <span word="to">to</span> <span word="a">a</span> <span word="new">new</span> <span word="sleep">sleep</span> <span word="study">study</span> <span word="conducted">conducted</span> <span word="by">by</span> <span word="Dr">Dr</span>. <span word="Rachel">Rachel</span> <span word="Salas">Salas</span>, <span word="assistant">assistant</span> <span word="professor">professor</span> <span word="of">of</span> <span word="neurology">neurology</span> <span word="at">at</span> <span word="Johns">Johns</span> <span word="Hopkins">Hopkins</span> <span word="University">University</span> <span word="School">School</span> <span word="of">of</span> <span word="Medicine">Medicine</span> <span word="and">and</span> <span word="head">head</span> <span word="author">author</span> <span word="of">of</span> <span word="the">the</span> <span word="new">new</span> <span word="research">research</span> <span word="project">project</span>.</p><p><span word="Salas">Salas</span> <span word="stated">stated</span> <span word="in">in</span> <span word="the">the</span> <span word="report">report</span> <span word="from">from</span> <span word="their">their</span> <span word="research">research</span> <span word="in">in</span> <span word="Sleep">Sleep</span> <span word="Journal">Journal</span> <span word="that">that</span> <span word="insomniacs">insomniacs</span> <span word="have">have</span> <span word="more">more</span> <span word="active">active</span> <span word="brains">brains</span> <span word="than">than</span> <span word="sound">sound</span> <span word="sleepers">sleepers</span>, <span word="and">and</span> <span word="the">the</span> <span word="disorder">disorder</span> <span word="is">is</span> <span word="not">not</span> <span word="something">something</span> <span word="that">that</span> <span word="occurs">occurs</span> <span word="only">only</span> <span word="at">at</span> <span word="night">night</span>. <span word="Insomnia">Insomnia</span> <span word="is">is</span> “<span word="more">more</span> <span word="of">of</span> <span word="a">a</span> 24/7 <span word="disorder">disorder</span>,” <span word="she">she</span> <span word="said">said</span>. “<span word="The">The</span> <span word="light">light</span> <span word="switch">switch</span> <span word="is">is</span> <span word="continually">continually</span> <span word="on">on</span>.”</p>
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