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This is Scientific American 60-Second Science. I'm Cynthia Graber. This'll just take a minute.
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A friend's four year old daughter recently complained to me about how badly her mosquito bite itched.
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She was about to burst into tears.
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The fact that an uncomfortable itchy sensation can drive many of us to distraction led many scientists to believe that the nervous system deals with itch much as it does pain.
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Others spent years looking, unsuccessfully, for neurons that tell us to scratch rather than that we just hurt.
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Now, according to a study in the August 7th issue of the journal Science, researchers say they've finally found specific itch neurons in mice.
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They located them in the mouse spinal cord by following up on previous research that showed that some mice respond to itchy stimuli more than others.
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When scientists knocked out the itch neurons, the mice no longer had the urge to scratch in response to known itchy stimulus.
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But they could still sense and avoid pain, showing that itch and pain are processed independently.
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The researchers hope that these findings could eventually lead to better treatments for chronic itch, by targeting the specific biochemical pathways involved.
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As for the four-year-old?
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She forgot about her itchy bug bite as soon as lunch arrived.
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Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.
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1 / 13
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显示原文 =This is Scientific American 60-Second Science. I'm Cynthia Graber. This'll just take a minute.
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2 / 13
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显示原文 =A friend's four year old daughter recently complained to me about how badly her mosquito bite itched.
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3 / 13
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显示原文 =She was about to burst into tears.
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4 / 13
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显示原文 =The fact that an uncomfortable itchy sensation can drive many of us to distraction led many scientists to believe that the nervous system deals with itch much as it does pain.
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5 / 13
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显示原文 =Others spent years looking, unsuccessfully, for neurons that tell us to scratch rather than that we just hurt.
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6 / 13
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显示原文 =Now, according to a study in the August 7th issue of the journal Science, researchers say they've finally found specific itch neurons in mice.
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7 / 13
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显示原文 =They located them in the mouse spinal cord by following up on previous research that showed that some mice respond to itchy stimuli more than others.
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8 / 13
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显示原文 =When scientists knocked out the itch neurons, the mice no longer had the urge to scratch in response to known itchy stimulus.
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9 / 13
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显示原文 =But they could still sense and avoid pain, showing that itch and pain are processed independently.
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10 / 13
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显示原文 =The researchers hope that these findings could eventually lead to better treatments for chronic itch, by targeting the specific biochemical pathways involved.
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11 / 13
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显示原文 =As for the four-year-old?
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12 / 13
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显示原文 =She forgot about her itchy bug bite as soon as lunch arrived.
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13 / 13
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显示原文 =Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.
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- 单句循环：关
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- 单句循环：∞