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SSS 2009-01-30

时间:2010-05-17 03:05来源:互联网 提供网友:木渐浅。   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute.

 

You probably remember exactly what you were doing when you first heard the news on 9/11. That’s because the brain has ways to file information so that things that happen at the same time are forever linked in our minds. Now a study published in the journal 《Neuron》says that newborn cells in a structure called the hippocampus help us remember concurrent1 events.

The hippocampus is part of the brain that allows us to lay down new memories. And about ten years ago, scientists were surprised to find that new neurons pop up in this region every day, even in adult animals and people. But what do these new cells do?

Scientists turned to computer modeling to help them find out. They put in what they knew about the behavior of these new cells, which start out like puppies2 that get totally excited over every little thing, and eventually mature into more discerning3 members of neuronal society.

And they found that the hyperactivity of these excitable young cells, which react with great gusto to everything that goes on, could help stamp memories with a sort of “time code” that indicates which things happened together. So if you still remember what you were eating when you dumped your loser boyfriend, you can thank your newborn neurons.

 

Thanks for the minute for Scientific American's 60-Second Science. I'm Karen Hopkin.

 


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1 concurrent YncyG     
adj.同时发生的,一致的
参考例句:
  • You can't attend two concurrent events!你不能同时参加两项活动!
  • The twins had concurrent birthday. 双胞胎生日在同一天。
2 puppies 679f34ba1ec7d7ee1f1718acc24f53d7     
n.(常指不满一岁的)小狗(puppy的复数);小狗,幼犬( puppy的名词复数 );浅薄自负的年轻男子
参考例句:
  • a litter of puppies 一窝小狗
  • The bitch bore six puppies. 母狗生了六只小狗。 来自《简明英汉词典》
3 discerning gu9z9L     
a.有眼力的,有识别力的,有鉴赏力的
参考例句:
  • She has a discerning palate. 她的味觉很敏锐。
  • Anyone with a discerning eye can easily see. 明眼人一看便知。
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