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[科学美国人60秒] 【整理】SSS 2008-07-09

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[科学美国人60秒] 【整理】SSS 2008-07-09

 

 

SSS 2008-07-09

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Tune in every weekday for quick reports and commentaries on the world of science-- it'll just take a minute.


Research with rats finds that Ritalin at low doses encourages neurons to fire together, but at high doses it's just another stimulant. Christopher Intagliata reports



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【整理】SSS 2008-07-09【整理人】ZPC224

Transcript

 

This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute?

 

Doctors prescribe Ritalin to hyperactive kids to calm them down and increase their attention span. And college kids have taken to using Ritalin to concentrate when they hit the books. But it hasn't been clear how the drug boosts focus. Now a paper in the journal Biological Psychiatry suggests how it might work. Neuronscientists dosed rats with Ritalin and had them perform the kind of working memory task ADHD patients have trouble with. At the same time,they measured neural activity with tiny-electrodes implanted in the rats' brains.At low doses Ritalin primarily affected the prefrontal cortex,jacking up its sensitivity to signals coming in from the hippocampus.And here is how the drugs seemed to help with attention,it strengthened choruses of neurons firing together and put a damper on scattered uncoordinated activity. But at high doses the profrontal cortex tuned out and Ritalin's effects were similar to those of other stimulants.The rats lost their cognitive edge and they became hyperactive,sniffing and licking repetitively.So Ritalin shows you can indeed have too much of a good thing to the point of distraction.

 

Thanks for the minute for Scientific American's 60-Second Science. I am Christopher Intagliata.

 

WORDS AND EXPRESSIONS:

 

Hippocampus: The hippocampus is a part of the forebrain, located in the medial temporal lobe.

 

 

 

[ 本帖最后由 zpc224 于 2008-7-19 13:56 编辑 ]

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HW

This is Scientific American's 60-second science. I'm Christopher Intagliata. Got a minute?

 

Doctors prescribe ritalin to hyperactive kids to calm them down and increase their attention span.And college kids've taken the use of the ritalin to concentrate when they hit the books.But it hasn't been clear how the drug boosts focus.Now a paper in the Journal Biological Psychiatry suggests how it might work,there are scientists dosed rats with ritalin and had them perform the kind of working memory task ADHD patients have trouble with.At the same time,they measured neural activities with tiny-electrodes implanted into the rats' brains.At low doses ridalin primarily affect the prefrontal cortex,jacking up its sensitivity to signals coming from the Hiper Campus.And here is how the drugs seemed to help with attention,it strengthened choruses of neurons firing together and put a damper on scattered uncoordinated activity but the high doses the profrontal cortex tune out and ritalin's effects are similar to those of other stimulants.The rats lost their cognitive edge and they became hyperactive,sniffing and leaking repetitively.So ritalin shows it can and indeed have too much of a good thing to the point of distraction.

 

Thanks for the minute for scientific American's 60s science. I am Christopher Intagliata.

 

 

where the fellows are?

[ 本帖最后由 WONDERFUL. 于 2008-7-10 11:25 编辑 ]
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  • zpc224

坚持下去,享受下去...
That man is coming back again...
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on WONDERFUL.

This is Scientific American's 60-second science. I'm Christopher Intagliata. Got a minute?

 

Doctors prescribe Ritalin to hyperactive kids to calm them down and increase their attention span. And college kids have taken the use of the ritalin to concentrate when they hit the books. But it hasn't been clear how the drug boosts focus. Now a paper in the Journal Biological Psychiatry suggests how it might work, there are scientists dosed rats with Ritalin and had them perform the kind of working memory task ADHD patients have trouble with. At the same time,they measured neural activities with tiny-electrodes implanted into the rats' brains.At low doses Ritalin primarily affected the prefrontal cortex,jacking up its sensitivity to signals coming from the Hipper Campus.And here is other drugs seemed to help with attention,it strengthened choruses of neurons firing together and put a damper on scattered uncoordinated activity but the high doses the profrontal cortex tune out and Ritalin's effects are similar to those of other stimulants.The rats lost their cognitive edge and they became hyperactive,sniffing and leaking repetitively.So Ritalin shows it can and indeed have too much of a good thing to the point of distraction.

 

Thanks for the minute for scientific American's 60s science. I am Christopher Intagliata.

 

 

where the fellows are?

1

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  • zpc224

实现无障碍英语沟通

On sherrycream

This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute?

 

Doctors prescribe Ritalin to hyperactive kids to calm them down and increase their attention span. And college kids have taken to using Ritalin to concentrate when they hit the books. But it hasn't been clear how the drug boosts focus. Now a paper in the journal Biological Psychiatry suggests how it might work. Neuronscientists dosed rats with Ritalin and had them perform the kind of working memory task ADHD patients have trouble with. At the same time,they measured neural activity with tiny-electrodes implanted in the rats' brains.At low doses Ritalin primarily affected the prefrontal cortex,jacking up its sensitivity to signals coming in from the hippocampus.And here is how the drugs seemed to help with attention,it strengthened choruses of neurons firing together and put a damper on scattered uncoordinated activity. But at high doses the profrontal cortex tuned out and Ritalin's effects were similar to those of other stimulants.The rats lost their cognitive edge and they became hyperactive,sniffing and licking repetitively.So Ritalin shows you can / indeed have too much of a good thing to the point of distraction.

 

Thanks for the minute for Scientific American's 60-Second Science. I am Christopher Intagliata.

 

WORDS AND EXPRESSIONS:

Hippocampus: The hippocampus is a part of the forebrain, located in the medial temporal lobe.

[ 本帖最后由 zpc224 于 2008-7-10 13:53 编辑 ]
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homework

This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute?

 

 

Doctors prescribe Ritalin to hyperactive kid to calm them down and increase their attention span. In college kids have taken using Ritalin to concentrate when they hit the books. But it hasn’t been clear how the drug boost focus. Now a paper in the journal Biological Psychiatry suggests how in might work. Neuroscientists dose rats with Ritalin and had them perform the kind of working memory task ADHD patients have trouble with.

 

At the same time they measured neural activity with tiny electros implanted in the rat’s brains, At low doses, Ritalin primarily affected the prefrontal cortex, jacking up its sensitivity to signals coming in from the hippocampus. And here’s how the drugs seem to help with the tension.

 

It’s strengthened choruses of neurons firing together and put a damper on the scattered uncoordinated activity. But at high doses, the prefrontal cortex tuned out and Ritalin affects were similar to those of other stimulus, the rats lost their cognitive edge, and became hyperactive sniffing and licking repetitively, So Ritalin shows that you can’t indeed have too much of a good thing to the point of distraction.

 

Thanks for the minute, for scientific Americans’ 60-scecond science, I’m Christopher Intagliata.

 

notes:

 

Attention Deficit Hyperactivity Disorder (ADHD)

 

利他林 Ritalin

 

脑中的海马(hippocampus)

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  • zpc224

Connasi-toi toi-meme

http://hanqialice.spaces.live.com/
homework This is scientific American's 60-second science. I'm Christophor Intagliata. Got a minite? Doctors prescribe Reblin the hibrective kids to come down any cri attention college will take it easy to concentrate but it hasn't been clear how the focus now a biological si suggest how work. there are scientist those are ridling and how to perform the kind of memory task EDHD patience have trouble with. the same time they measure

H~W<

  This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute?

 Doctors prescribe Ritalin to hyperactive kids to calm them down and increase their attention span. And college kids have taken  using Ritalin to concentrate when they hit the books. But it hasn't been clear how the drug boosts focus. Now a paper in the journal Biological Psychiatry suggests how it might work. Neuronscientists dosed rats with Ritalin and had them perform the kind of working memory task ADHD patients have trouble with. The same time,they measured neural activity with tiny-electrodes implanted in the rats' brains.At low doses Ritalin primarily affected the prefrontal cortex,jacking up its sensitivity to signals coming in from the hippocampus.And here is how the drugs seemed to help with attention,it strengthened choruses of neurons firing together and put a damper on scattered uncoordinated activity. But at high doses the profrontal cortex tuned out and Ritalin's effects were similar to those of other stimulants.The rats lost their cognitive edge and they became hyperactive,sniffing and licking repetitively.So Ritalin shows you can indeed have too much of a good thing to the point of distraction.

Thanks for the minute for Scientific American's 60-Second Science. I am Christopher Intagliata.

On the way...... 重庆崽儿,永不言弃!
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