改变脑部活动可预防老年痴呆症-凯发k8官网

改变脑部活动可预防老年痴呆症
文章来源:未知 文章作者:enread 发布时间:2012-07-17 02:31 字体: [ ] 
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activity lingers longer in certain areas of the brain in those with alzheimer's than it does in healthy people, mayo clinic researchers who created a map of the brain found. the results suggest varying brain activity may reduce the risk of alzheimer's disease. the study, "non-stationarity in the "resting brain's" modular architecture," was presented at the alzheimer's association international conference and recently published in the journal plos one. researchers compared brain activity to a complex network, with multiple objects sharing information along pathways.

"our understanding of those objects and pathways is limited," says lead author david t. jones, m.d. "there are regions in the brain that correspond to those objects, and we are not really clear exactly what those are. we need a good mapping or 1(地图集) of those regions that make up the network in the brain, which is part of what we were doing in this study."

researchers examined 892 2 normal people taking part in the mayo clinic study of aging, and set out to create an active map of their brains while the people were "at rest," not engaged in a specific task. to do this, they employed task-free, 3 magnetic 4 imaging to construct an atlas of 68 functional regions of the brain, which correspond to the cities on the road map.

researchers filled in the roads between these regions by creating dynamic(动态的) 5 representations of brain connectivity within a sliding time window.

this analysis revealed that there were many roads that could be used to exchange information in the brain, and the brain uses different roads at different times. the question to answer then, said dr. jones, is whether or not alzheimer's patients used this map and these roads in a different way than their healthy peers.

"what we found in this study was that alzheimer's patients tended to spend more time using some roads and less time using other roads, 6(偏置) one over the other," he says.



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1 vocy5     
n.地图册,图表集
参考例句:
  • he reached down the atlas from the top shelf.他从书架顶层取下地图集。
  • the atlas contains forty maps,including three of great britain.这本地图集有40幅地图,其中包括3幅英国地图。
2 d28af4705de1f9218cb8ba1d5bdf8372     
参考例句:
  • cognitively,man,the subject of cognition,must classify and categorize the objects. 从认知学角度来看 ,作为认知主体的人对于认知对象必须进行分类和范畴化。 来自互联网
  • cognitively, reference can be studied along with information processing of human mind. 从认知的角度看,要研究人类思维的信息处理过程。 来自互联网
3 5hmxa     
adj.为实用而设计的,具备功能的,起作用的
参考例句:
  • the telephone was out of order,but is functional now.电话刚才坏了,但现在可以用了。
  • the furniture is not fancy,just functional.这些家具不是摆着好看的,只是为了实用。
4 hbazc     
n.洪亮;共鸣;共振
参考例句:
  • playing the piano sets up resonance in those glass ornaments.一弹钢琴那些玻璃饰物就会产生共振。
  • the areas under the two resonance envelopes are unequal.两个共振峰下面的面积是不相等的。
5 aedz7     
adj.生动的,形象的,绘画的,文字的,图表的
参考例句:
  • the book gave a graphic description of the war.这本书生动地描述了战争的情况。
  • distinguish important text items in lists with graphic icons.用图标来区分重要的文本项。
6 6e037202cd9773673c90aa8e430c483a     
使倾向于( bias的现在分词 ); 偏压
参考例句:
  • we must give great care upon transistor biasing. 我们必须十分重视晶体管的偏置。
  • you are biasing my choice by telling me yours. 你在用你的选择否认我的选择。
tag标签: brain patients alzheimer
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