A few minutes after the call, a PET scan revealed that brain regions next to the working phone had higher levels of glucose metabolism.

通话数分钟后，经PET扫描的数据显示，紧贴通话中手机一侧的大脑区域葡萄糖代谢水平增高。

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The report said it was unclear whether the changes in the brain - an increase in glucose metabolism after using the phone for less than an hour - had any negative health or behavioral effects.

报道说目前尚不清楚大脑的变化是否对健康或行为有负面影响——接听电话不到一个小时就会引起葡萄糖代谢的增加。

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For instance, glucose metabolism in the language centers of the brain rises by about 10 percent when a person is talking, Volkow says.

例如，当人们说话时，脑部语言中枢的葡萄糖代谢将会增长10%。

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The small study, published in the Journal of American Medical Association, is the first to look specifically at how electromagnetic radiation from cell phones affects glucose metabolism, a normal function, in the brain.

CNN: Cell phone exposure increases brain cell activity