"The brain's ability to learn information is not stable across the day," Walker tells WebMD.

沃克告诉网络医生说：“在一整天里，脑学习信息的能力不是稳定的。”

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The nap before learning may help clear out the hippocampus and send the data on to the prefrontal cortex, allowing new information to soak in, Walker says.

在学习前小睡，可以帮助海马清空记忆内存，并发送数据到前额叶皮层，让新的信息融入到那里，沃克说。

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The study results suggest that sleep before learning may be important, too, just as experts have known that sleep after learning is crucial to solidify information learned, Walker says.

沃克说：这项研究的结果表明，学习前的睡眠可能也是很重要的，正如专家们都知道，学习后的睡眠是非常重要的，这可以巩固学到的信息。

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Dr Lesley Walker, director of information at Cancer Research UK, said the potential for screening using this method was huge, but he said it was still early days.

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Dr Lesley Walker, head of scientific information for the Cancer Research Campaign, said a pan-European collaboration would be welcome, but warned it would be difficult to apply guidance across the contintent.

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The campaign's head of scientific information, Dr Lesley Walker, said the outlook for those developing the disease was improving all the time.

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