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
80
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
Readthearticlebelowaboutproblemsindonginternationaltrade.Foreachquestion23-28ontheoppositepage,choosethe
Ifyouhaveanyfurtherquestionaboutournewproducttoask,donothesitatetocallmeat13044153703.
ReadtheinformationbelowaboutmakinginternationalpaymentsthroughtheInternet.Choosethecorrectwordtofilleachga
ReadtheinformationbelowaboutmakinginternationalpaymentsthroughtheInternet.Choosethecorrectwordtofilleachga
随机试题
对脑水肿,何者疗效为佳
未经批准在电力设施周围进行危及电力设施安全的作业,由()责令停止作业。
通信设备的安装要求主要应考虑的有()。
申请人符合会计从业.资格考试报名基本条件且具备国家教育行政主管部门认可的 ( )以上会计类专业学历(或学位)的,自毕业之日起2年免试会计基础、初级会计电算化(或珠算五级)。
在社会工作研究领域中,起源于第二次世界大工业战时期、目前已成为实务工作研究重要方法的是( )。
根据所给内容,完成填空。一位老师家访,与学生不识字的奶奶聊天,老师用哪种说法更好?请你将选择的序号填写在横线上,并说明原因。“您老人家身体很好哇。什么?我不是来告状的。你孙子在学校没有_____________(A.犯错误B.惹事),就是读书
在不考虑技术进步和人口增长的索洛模型中,假设经济体初始处于稳态且资本量处于黄金律水平以下,如果政府准备一次性提高储蓄率以使经济在长期内达到黄金律资本水平,画图说明政府提高储蓄率对产出、清费和投资影响的动态过程(提示:以时间为横轴刻画产出、消费和投资的变化过
在商品经济发展的过程中,劳动力作为重要的生产要素进行买卖。工人在劳动力市场上出售的是()
中日甲午战争以后,接踵而来的瓜分狂潮,使中华民族的各阶级、各阶层普遍产生了亡国灭种的危机感,促使中国人民民族意识普遍觉醒。甲午战争后的戊戌维新、辛亥革命等都高举爱国主义旗帜,这一时期的时代主旋律是
下列函数中,操作对象可以是元组的函数是()。
最新回复
(
0
)