六级阅读过多的压力让你的记忆力衰退
<p> <span word="Scientists">Scientists</span> <span word="claim">claim</span> <span word="to">to</span> <span word="have">have</span> <span word="solved">solved</span> <span word="the">the</span> <span word="mystery">mystery</span> <span word="of">of</span> <span word="how">how</span> <span word="stress">stress</span> <span word="contributes">contributes</span> <span word="to">to</span> <span word="memory">memory</span> <span word="loss">loss</span> <span word="in">in</span> <span word="old">old</span> <span word="age">age</span>. <span word="Researchers">Researchers</span> <span word="at">at</span> <span word="Edinburgh">Edinburgh</span> <span word="University">University</span> <span word="have">have</span> <span word="shown">shown</span> <span word="how">how</span> <span word="two">two</span> <span word="receptors">receptors</span> <span word="in">in</span> <span word="older">older</span> <span word="brains">brains</span> <span word="react">react</span> <span word="to">to</span> <span word="the">the</span> <span word="stress">stress</span> <span word="hormone">hormone</span> <span word="cortisol">cortisol</span>, <span word="which">which</span> <span word="has">has</span> <span word="been">been</span> <span word="linked">linked</span> <span word="to">to</span> <span word="memory">memory</span> <span word="loss">loss</span> <span word="in">in</span> <span word="the">the</span> <span word="elderly">elderly</span>. 科学家们表明他们已经揭开了压力如何导致老年记忆衰退之秘。爱丁堡大学的研究者解释了两个老化的大脑感受器如何对应激激素皮质醇作出反应，这跟老年记忆衰退有关。 <span word="The">The</span> <span word="study">study</span> <span word="found">found</span> <span word="that">that</span> <span word="one">one</span> <span word="receptor">receptor</span> <span word="was">was</span> <span word="activated">activated</span> <span word="by">by</span> <span word="low">low</span> <span word="levels">levels</span> <span word="of">of</span> <span word="cortisol">cortisol</span>, <span word="which">which</span> <span word="helped">helped</span> <span word="memory">memory</span>. 研究发现一个感受器被低水平的皮质醇所激活，有助于记忆力。 <span word="However">However</span>, <span word="once">once</span> <span word="levels">levels</span> <span word="of">of</span> <span word="the">the</span> <span word="hormone">hormone</span> <span word="were">were</span> <span word="too">too</span> <span word="high">high</span> <span word="they">they</span> <span word="spilled">spilled</span> <span word="over">over</span> <span word="on">on</span> <span word="to">to</span> <span word="a">a</span> <span word="second">second</span> <span word="receptor">receptor</span>, <span word="activating">activating</span> <span word="brain">brain</span> <span word="processes">processes</span> <span word="which">which</span> <span word="contribute">contribute</span> <span word="to">to</span> <span word="memory">memory</span> <span word="impairment">impairment</span>. 然而，一旦激素水平过高，就会溢出洒向第二个感受器，激活大脑运作导致记忆障碍。 <span word="When">When</span> <span word="the">the</span> <span word="receptor">receptor</span> <span word="linked">linked</span> <span word="to">to</span> <span word="poor">poor</span> <span word="memory">memory</span> <span word="was">was</span> <span word="blocked">blocked</span>, <span word="the">the</span> <span word="memory">memory</span> <span word="recall">recall</span> <span word="problem">problem</span> <span word="was">was</span> <span word="reversed">reversed</span>. 当连接到健忘的感受器被阻塞，记忆恢复问题就会被改变。 <span word="The">The</span> <span word="experiment">experiment</span> <span word="based">based</span> <span word="on">on</span> <span word="older">older</span> <span word="mice">mice</span> <span word="navigating">navigating</span> <span word="a">a</span> <span word="maze">maze</span>, <span word="was">was</span> <span word="published">published</span> <span word="in">in</span> <span word="the">the</span> <span word="Journal">Journal</span> <span word="of">of</span> <span word="Neuroscience">Neuroscience</span>. <span word="The">The</span> <span word="research">research</span> <span word="helps">helps</span> <span word="explain">explain</span> <span word="why">why</span> <span word="too">too</span> <span word="much">much</span> <span word="stress">stress</span> <span word="over">over</span> <span word="a">a</span> <span word="prolonged">prolonged</span> <span word="period">period</span> <span word="interferes">interferes</span> <span word="with">with</span> <span word="the">the</span> <span word="normal">normal</span> <span word="processes">processes</span> <span word="in">in</span> <span word="storing">storing</span> <span word="everyday">everyday</span> <span word="memories">memories</span>. <span word="This">This</span> <span word="is">is</span> <span word="despite">despite</span> <span word="the">the</span> <span word="fact">fact</span> <span word="that">that</span> <span word="a">a</span> <span word="little">little</span> <span word="bit">bit</span> <span word="of">of</span> <span word="stress">stress</span> <span word="can">can</span> <span word="help">help</span> <span word="us">us</span> <span word="better">better</span> <span word="remember">remember</span> <span word="emotional">emotional</span> <span word="memories">memories</span>. <span word="Dr">Dr</span> <span word="Joyce">Joyce</span> <span word="Yau">Yau</span> <span word="said">said</span>: <span word="While">While</span> <span word="we">we</span> <span word="know">know</span> <span word="that">that</span> <span word="stress">stress</span> <span word="hormones">hormones</span> <span word="affect">affect</span> <span word="memory">memory</span>, <span word="this">this</span> <span word="research">research</span> <span word="explains">explains</span> <span word="how">how</span> <span word="the">the</span> <span word="receptors">receptors</span> <span word="they">they</span> <span word="engage">engage</span> <span word="with">with</span> <span word="can">can</span> <span word="switch">switch</span> <span word="good">good</span> <span word="memory">memory</span> <span word="to">to</span> <span word="poorly">poorly</span>-<span word="functioning">functioning</span> <span word="memory">memory</span> <span word="in">in</span> <span word="old">old</span> <span word="age">age</span>. 以大老鼠走迷宫为基础的实验发表在《神经科学杂志》上。 该研究解释了为什么长期过多压力会影响日常储存记忆的正常程序。 尽管一点点压力可以帮助我们更好地进行情绪记忆。 <span word="Joyce">Joyce</span> <span word="Yau">Yau</span>教授说：我们知道应激激素影响记忆，该研究解释了参与的两个感受器如何在老年时将良好记忆转换成不良记忆。 <span word="She">She</span> <span word="added">added</span> <span word="that">that</span> <span word="understanding">understanding</span> <span word="the">the</span> <span word="mechanisms">mechanisms</span> <span word="in">in</span> <span word="the">the</span> <span word="brain">brain</span>, <span word="which">which</span> <span word="affect">affect</span> <span word="memory">memory</span> <span word="as">as</span> <span word="we">we</span> <span word="age">age</span>, <span word="will">will</span> <span word="help">help</span> <span word="find">find</span> <span word="ways">ways</span> <span word="to">to</span> <span word="combat">combat</span> <span word="conditions">conditions</span> <span word="linked">linked</span> <span word="to">to</span> <span word="memory">memory</span> <span word="loss">loss</span>. <span word="The">The</span> <span word="study">study</span> <span word="was">was</span> <span word="funded">funded</span> <span word="by">by</span> <span word="the">the</span> <span word="Medical">Medical</span> <span word="Research">Research</span> <span word="Council">Council</span>. 她还说，了解随着年龄老化影响记忆的大脑机制有助于找到与记忆衰退有关问题的解决方法。 该研究得到了医学研究理事会的资助。 <span word="Professor">Professor</span> <span word="Chris">Chris</span> <span word="Kennard">Kennard</span>, <span word="of">of</span> <span word="the">the</span> <span word="MRC">MRC</span>, <span word="said">said</span>: <span word="This">This</span> <span word="research">research</span> <span word="highlights">highlights</span> <span word="some">some</span> <span word="interesting">interesting</span>, <span word="original">original</span> <span word="concepts">concepts</span> <span word="relating">relating</span> <span word="to">to</span> <span word="why">why</span> <span word="memory">memory</span> <span word="loss">loss</span> <span word="occurs">occurs</span> <span word="in">in</span> <span word="old">old</span> <span word="age">age</span>. <span word="With">With</span> <span word="people">people</span> <span word="living">living</span> <span word="ever">ever</span> <span word="longer">longer</span>, <span word="the">the</span> <span word="MRC">MRC</span> <span word="is">is</span> <span word="really">really</span> <span word="focusing">focusing</span> <span word="on">on</span> <span word="research">research</span> <span word="which">which</span> <span word="allows">allows</span> <span word="elderly">elderly</span> <span word="people">people</span> <span word="not">not</span> <span word="just">just</span> <span word="to">to</span> <span word="survive">survive</span>, <span word="but">but</span> <span word="also">also</span> <span word="to">to</span> <span word="stay">stay</span> <span word="healthy">healthy</span>. <span word="The">The</span> <span word="researchers">researchers</span> <span word="are">are</span> <span word="looking">looking</span> <span word="at">at</span> <span word="a">a</span> <span word="new">new</span> <span word="chemical">chemical</span> <span word="compound">compound</span> <span word="which">which</span> <span word="blocks">blocks</span> <span word="an">an</span> <span word="enzyme">enzyme</span>, <span word="known">known</span> <span word="as">as</span> 11<span word="beta">beta</span>-<span word="HSD">HSD</span>1, <span word="which">which</span> <span word="helps">helps</span> <span word="produce">produce</span> <span word="stress">stress</span> <span word="hormones">hormones</span> <span word="within">within</span> <span word="cells">cells</span>. <span word="MRC">MRC</span>的教授<span word="Chris">Chris</span> <span word="Kennard">Kennard</span>说：这项研究重点介绍了一些原始有趣的观念，即关于为什么老年人记忆会衰退。 随着人们活的越来越长，<span word="MRC">MRC</span>真正关注的研究不仅是老年人的生存，而且是他们健康地生活。 研究人员在关注一种新的化合物11<span word="beta">beta</span>-<span word="HSD">HSD</span>1，它能阻碍一种酶，可以帮助细胞产生应激激素。 <span word="They">They</span> <span word="hope">hope</span> <span word="this">this</span> <span word="could">could</span> <span word="be">be</span> <span word="used">used</span> <span word="to">to</span> <span word="develop">develop</span> <span word="a">a</span> <span word="drug">drug</span> <span word="treatment">treatment</span> <span word="to">to</span> <span word="slow">slow</span> <span word="the">the</span> <span word="normal">normal</span> <span word="decline">decline</span> <span word="in">in</span> <span word="memory">memory</span> <span word="associated">associated</span> <span word="with">with</span> <span word="ageing">ageing</span>, <span word="or">or</span> <span word="even">even</span> <span word="improve">improve</span> <span word="memory">memory</span> <span word="in">in</span> <span word="people">people</span> <span word="who">who</span> <span word="are">are</span> <span word="very">very</span> <span word="old">old</span>. 他们希望这种化合物可以用来发明一种药物治疗，放慢由于变老造成的正常记忆衰退速度，甚至提高老年人的记忆力。</p>
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