首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
To sleep. Perchance to file? Findings published online this week by the Proceedings of the National Academy of Sciences further
To sleep. Perchance to file? Findings published online this week by the Proceedings of the National Academy of Sciences further
admin
2011-05-29
57
问题
To sleep. Perchance to file? Findings published online this week by the Proceedings of the National Academy of Sciences further support the theory that the brain organizes and stows memories formed during the day while the rest of the body is catching zzz’s.
Gyorgy Buzsaki of Rutgers University and his colleagues analyzed the brain waves of sleeping rats and mice. Specifically, they examined the electrical activity emanating from the somatosensory neocortex (an area that processes sensory information) and the hippocampus, which is a center for learning and memory. The scientists found that oscillation in brain waves from the two regions appear to be intertwined. So-called sleep spindles (bursts of activity from the neocortex) were followed tens of milliseconds later by beats in the hippocampus known as ripples. 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 levels.
Previous research had shown that individuals with diabetes 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 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 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 End weight control can help keep glucose levels in check, so there may be one more reason to go to the gym.
In what way is memory related to hippocampus shrinkage?
选项
A、There is no relation between memory and hippocampus shrinkage.
B、The more the hippocampus shrinks, the poorer one’s memory.
C、The more the hippocampus shrinks, the better one’s memory.
D、The less the hippocampus shrinks, the poorer one’s memory.
答案
B
解析
第四段最后一个句子中their brain scans,指上句中的Subjects with the poorest memory recollection的大脑扫描,所以选择B。
转载请注明原文地址:https://kaotiyun.com/show/uL6O777K
0
考博英语
相关试题推荐
Lookatthegraphbelow.Itshowstheaveragesharepricesofthreecompanies-GrantInternational,HDCUnionandtheLindelGr
Thesafetyteamiscarryingoutchecksinthisarea.Accesswithoutapermitisdenieduntilfurthernotice.
Readthearticlebelowaboutproblemsindonginternationaltrade.Foreachquestion23-28ontheoppositepage,choosethe
Readthearticlebelowaboutproblemsindonginternationaltrade.Foreachquestion23-28ontheoppositepage,choosethe
Ifyouhaveanyfurtherquestionaboutournewproducttoask,donothesitatetocallmeat13044153703.
Boardingtimes:30minutesbeforedeparturetimefordomesticand1hourforinternationalflights.
ReadtheinformationbelowaboutmakinginternationalpaymentsthroughtheInternet.Choosethecorrectwordtofilleachga
ReadtheinformationbelowaboutmakinginternationalpaymentsthroughtheInternet.Choosethecorrectwordtofilleachga
随机试题
“感觉剥夺”实验说明感觉是人类一切心理活动的______。
A.氨基糖苷类抗生素B.青霉素C.红霉素D.林可霉素(洁霉素)E.红霉素+利福平男性,25岁,3天来突然寒战高热,咳黄痰,胸片示:右上肺野大片状密度增浓影,可见支气管气道征,治疗应选
下列关于刑法上因果关系的说法哪些是正确的?
在设计文件中要求采用新技术、新工艺施工的工程项目,为了合理分担风险,施工合同中约定的计价方式应为()。
下列属于会计等式的有()。
若市场上有显著不同的顾客群,这些顾客群对商品和服务有不同的需求,或者习惯于以不同的方式使用商品,这时商品流通企业可采取()。
下列各项法律事实中,属于法律行为的有()。
随着人们生活水平的提高,人们对“绿色文化”越来越重视。现在你所在的部门要针对“绿色文化”开展一次研讨活动,由你来组织,请问你如何处理?
(1998年)
Theemptyhouse,inamiddle-classcornerofsouthernCalifornia,istwostoreyshighandboastsathree-cargarage.Rosesbloom
最新回复
(
0
)