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释放心灵,忘记不快

时间:2010-07-27 21:52    来源:    作者: 点击:
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    对付已往疾苦的影象,年青的年夜脑能健忘它们,可是年迈的年夜脑则没有那么轻易了。揭晓在《科学》(Science)杂志上的一项动物研究发明,让年夜脑"返老还童,规复其"韧"或者是可行的。Freeing the Mind to Forget

    Some things are hard to remember. Others are hard to forget-especially things that are traumatic. But kids, it turns out, are better than adults at forgetting the bad stuff. Now scientists think they know why. According to an animal study in the September 4th issue of the journal Science, the brains of adults erect physical barriers that keep painful memories intact.

    As adults, events that emotionally disturb us tend to get seared into our brains. And those memories can resurface, causing anxiety, fear and even post-traumatic stress disorder. But young brains are much more resilient-and can even erase unpleasant memories.

    To get a better handle on this youthful forgetting, scientists studied the brains of young and old rats. They found that in adult brains, a physical net forms around certain cells in the amygdala, a structure associated with emotional memories. Adults that had been trained to associate a mild foot shock with a specific sound would flinch when they just heard the sound. But using a drug to dissolve this barrier restored the older rats' ability to extinguish fearful memories. So rats that got the net-busting treatment stayed calm when they heard the sound.

    One of the few instances where a net loss is a real gain.

    释安心灵,健忘纳闷

    有些工作很难记取。有些工作--尤其是那些带来巨年夜创伤的工作--则很难健忘。不过,有功效发此刻健忘糟糕工作方面,小孩子要比成年人做得更好。此刻科学 家们以为他们找到了谜底。按照揭晓在9月4日《科学》(Science)杂志上的一项动物研究功效,成年人的年夜脑会建立起有形的窒碍,使得已往疾苦的影象 贯串毗邻原封不动。

    对付成年人,那些在激情上侵扰我们的工作易于深深印在我们的年夜脑内。而且那些影象能重现出来,从而导致我们焦灼、怕惧乃至让我们患上创伤后精神求助性窒碍 (post-traumatic stress disorder).可是年青年夜脑的"柔韧性"要好的多---它们乃至能抹去那些纳闷的影象。

    科学家们为了更好的理解理睬这种"年青的忘记"征象,他们研究了年青和年迈老鼠的年夜脑。科学家们发明,在成年迈鼠年夜脑的杏仁核(杏仁核与激情影象有关)的某些 细胞四周形成了一种有形的网。科学家对成年迈鼠举办了练习,使得这些老鼠能把稍微的足部电击和一种特定的声音接洽在一路,一旦这些老鼠听到这种声音,它们 就会退缩。可是当使用一种药物去失这种窒碍后,这些成年迈鼠又规复了它们消弭可骇影象的手段。是以对老鼠举办"消弭窒碍网"措置赏罚赏罚后,当这些老鼠在听到这种 特定声音的时辰,它们仍旧贯串毗邻惬意沉着荒僻默默的状况。

    这是完全失踪去变为真正得到的为数不久不多的例子之一。

 

    Vocabulary:

    Restore:规复

    Pliable:易弯曲的;柔韧的;易受影响的

    Traumatic:创伤的

    Erect:成立;建立

    Intact:不动的

    Disturb:滋扰

    Sear:烧灼;使蓦地感想剧痛

    Post-traumatic stress disorder: 创伤后精神求助性窒碍(简称PTSD)

    Resilient: 有适应力的

    Erase: 擦去

    Amygdala: 杏仁核;扁桃体

    Flinch: (俄然)退缩

    Dissolve: 消弭;(使)消散踪、消逝

    Extinguish: 杀绝;歼灭




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