2012年高考英语考前30天三轮专题提分必练绝密之 二十七 科普知识型阅读理解(一)（湖北专用）

if you see a student napping (打瞌睡) in the library, don’t roll your eyes.new research from the university of california, berkeley, shows that an hour’s nap can considerably improve and restore your brain power.indeed, the findings suggest that a nap not only refreshes the mind, but can make you smarter.

2012二轮精品提分必练

“sleep not only rights the wrong of extended wakefulness but it moves you beyond where you were before you took a nap.”said matthew walker, an assistant professor of psychology at uc berkeley and the lead investigator of uc berkeley sleep studies.

the latest study suggests that the brain may need sleep to process short­term memories, creating“space”for new facts to be learned.in their experiment,39 healthy adults were divided into two groups—nap and no­nap. at last it showed that the nappers improved their scores by 10 percent on average after sleeping; the scores of those who didn’t nap actually dropped by 10 percent.

the results support previous data from the same research team that staying up all night—a common practice at college during midterms and finals—decreases the ability to memorize new facts by nearly 40 percent, due to a shutdown of brain regions for lack of sleep, said walker.

“sleep is needed to clear the brain’s short­term memory storage and make room for new information.”said walker.“it’s as though the e­mail inbox in your brain is full and, until you sleep and clear out those e­mails, you’re not going to receive any more e­mails.”

however, professor derk­jan dijk, the director of the surrey sleep research centre, said that there was no clear evidence that daytime napping offered a distinct advantage over sleeping soundly just once over 24 hours.

“the sleep­wake cycle is not as fixed as we might think—we have the capability to sleep in different ways.”said professor derk­jan dijk.

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