The experiment was not for the squirmish. Volunteers were made to itch like crazy on one arm, but not allowed to scratch. Then they were whisked into an M.R.I. scanner to see what parts of their brains lit up when they itched, when researchers scratched them and when they were finally allowed to scratch themselves.
首先要申明的是,做这个实验可不是要存心折磨人——研究人员通过某些手段致使志愿者们一条手臂痒得发疯,却不允许他们用任何方式挠痒。然后再将他们送入磁共振(MRI)扫描仪,观察他们感到痒痒时,当研究人员帮他们挠痒,以及当他们终于得以自己挠痒时,他们的大脑中分别有哪些部位处于活跃状态。
The scientific question was this: Why does it feel so good to scratch an itch?
这项研究所要解决的科学问题是:为什么挠痒的感觉这么爽?
"It's quite intriguing to see how many brain centers are activated," said Dr. Gil Yosipovitch, chairman of dermatology at the Temple University School of Medicine and director of the Temple Center for Itch (he conducted the experiment while working at Wake Forest School of Medicine). "There is no one itch center. Everyone wants that target, but it doesn't work in real life like that."
“观察有多少大脑中枢受到激活,这差事相当有趣,”美国天普大学医学院(Temple University School of Medicine)的皮肤学系主任,天普大学瘙痒中心(Temple Center for Itch)主任吉尔·杨斯波维奇(Gil Yosipovitch)博士说。(他在威克森林大学[Wake Forest School of Medicine]工作时已经开展这项实验)。“大脑中并没有一个专门的瘙痒中枢。当然大家都希望能有这样一个靶标可以用来对付瘙痒,可现实并不总能尽如人意。”
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