2. 外语
  3. To sleep. Perchance (古英文，或许) to file? Findings published online this week by the Proceedings (文献汇编) of the National Academy of S

To sleep. Perchance (古英文，或许) to file? Findings published online this week by the Proceedings (文献汇编) of the National Academy of S

admin2012-08-10  57
问题     To sleep. Perchance (古英文，或许) to file? Findings published online this week by the Proceedings (文献汇编) of the National Academy of Sciences further support the theory that the brain organizes and stores memories formed during the day while the rest of the body is catching zzz’s.
    Gyorgy Buzsake of Rutgers University and his colleagues analyzed the brain waves of sleeping rats and mice. Specifically, they examined the electrical activity emanating (发源) from the somatosensory neocortex (大脑体觉新皮层) (an area that processes sensory information) and the hippocampus (海马状突起), which is a center for learning and memory. The scientists found that oscillations (震荡) in brain waves from the two regions appear to be intertwined. So-called sleep spindles (纺锤体) (bursts of activity from the neocortex) were followed tens of milliseconds (毫秒) later by beats in the hippocampus known as ripples (波动). The team posits that this interplay between the two brain regions is a key step in memory consolidation.
    A second study, also published online this week by the Proceedings of the National Academy of Sciences, links age-associated memory decline to high glucose (葡萄糖) levels.
    Previous research had shown that individuals with diabetes (糖尿病) suffer from increased memory problems. In the new work, Antonio Convit of New York University School of Medicine and his collaborators studied 30 people whose average age was 69 to investigate whether sugar levels, which tend to increase with age, affect memory in healthy people as well. The scientists administered recall tests, brain scans and glucose tolerance (血糖浓度容许量) tests, which measure how quickly sugar is absorbed from the blood by the body’s tissues. Subjects with the poorest memory recollection, the team discovered, also displayed the poorest glucose tolerance. In addition, their brain scans showed more hippocampus shrinkage than those of subjects better able to absorb blood sugar.
    "Our study suggests that this impairment (损害) may contribute to the memory deficits that occur as people age. " Convit says. "And it raises the intriguing possibility that improving glucose tolerance could reverse some age-associated problems in cognition." Exercise and weight control can help keep glucose levels in check, so there may be one more reason to go to the gym.
Which of the following statements is nearest in meaning to the sentence "To sleep. Perchance to file"?
选项 A、Does brain arrange memories in useful order during sleep?
B、Does brain have memories when one is sleeping?
C、Does brain remember files after one falls asleep?
D、Does brain work on files in sleep?
答案A
解析 可定位在第1段，指出刊登在本周网上出版的国家科学院文献汇编上的新发现进一步证明了这个理论：当人体的其他部分在鼾声中安眠时，人体大脑就在整理和储存着白天形成的记忆。“To sleep．Perchance to file?”是从莎士比亚笔下哈姆雷特的独自中的名句“To sleep：perchance todream”变化而来，故选项A的意思最接近。
转载请注明原文地址:https://kaotiyun.com/show/IU57777K
0

大学英语四级

相关试题推荐
随机试题
最新回复(0)