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
Left-handers have been the subject of curiosity, stigma and even fear over the centuries. Researchers now, however, are recogniz
Left-handers have been the subject of curiosity, stigma and even fear over the centuries. Researchers now, however, are recogniz
admin
2014-09-30
51
问题
Left-handers have been the subject of curiosity, stigma and even fear over the centuries. Researchers now, however, are recognizing the scientific importance of understanding why people use one hand or the other to write, eat or toss a ball.
Handedness, as the dominance of one hand over the other is called, provides a window into the way our brains are wired, experts say. And it may help shed light on disorders related to brain development, like dyslexia(诵读困难症), schizophrenia(精神分裂症)and attention deficit hyperactivity disorder, or ADHD(注意力缺陷多动障碍), which are more common in left-handed people.
Other recent research suggests that mixed-handedness—using different hands for daily tasks and not having a dominant one—may be even more strongly linked than left-handedness to ADHD and possibly other conditions.
About 10% of people are left-handed, according to expert estimates. Another 1% of the population is mixed-handed. What causes people not to favor their right hand is only partly due to genetics—even identical twins, who have 100% of the same genes, don’t always share handedness.
More important, researchers say, are environmental factors—especially stress—in the womb. Babies born to older mothers or at a lower birth weight are more likely to be lefties, for example. And mothers who were exposed to unusually high levels of stress during pregnancy are more likely to give birth to a left-handed child. A review of research, published in 2009 in the journal Neuropsychologia, estimated that about 25% of the variability in handedness is due to genetics.
On average there is no significant difference in IQ between righties and lefties, studies show, betraying popular perceptions. There is some evidence that lefties are better at divergent thinking, or starting from existing knowledge to develop new concepts, which is considered an element of creativity. And left-handed people have salaries that on average are about 10% lower than righties, according to recent research performed at Harvard University that analyzed large income data bases, although findings of some earlier studies were mixed.
Left-handedness appears to be associated with a greater risk for a number of psychiatric and developmental disorders. While lefties make up about 10% of the overall population, about 20% of people with schizophrenia are lefties, for example. Links between left-handedness and dyslexia, ADHD and some mood disorders have also been reported in research studies.
The reasons for this aren’t clear. Scientists speculate it could be related to a concept known as brain lateralization. The brain has two halves. Each performs primarily separate, specialized functions, such as language processing, which mainly takes place in the left hemisphere. There is lots of communication between the hemispheres.
Having the knowledge of handedness can______.
选项
A、allow us to know clearly about how our brains work
B、make us understand the secret of brains’ interconnection
C、explain how some people have special diseases as their brains develop
D、offer us a stage where we can exchange information about brains
答案
C
解析
细节辨认题。第二段阐述了偏手性的研究价值:为了解大脑的线路传输方式提供一个窗口;有助于解释与大脑发育有关的一些疾病,如诵读困难症、精神分裂症等。这些疾病为精神和发育方面的疾病,是伴随大脑发育过程产生的,因此C)正确。A)“偏手性可以使我们清楚了解大脑如何运作”是原文中的“偏手性为了解我们大脑的线路传输方式提供了一个窗口”的夸大说法,故排除;B)“偏手性让我们了解大脑间相互连接的奥秘”在原文中没有提及,故排除;D)“偏手性为我们交流有关大脑的信息提供平台”偏离主题,故排除。
转载请注明原文地址:https://kaotiyun.com/show/iFm7777K
0
大学英语六级
相关试题推荐
中国人的姓名有自己的传统和特点。与西方人不同,中国人的姓名是姓在前,名在后。名通常为1~2个汉字。中国人的姓名传达持殊意义,名字往往表达对新生儿的美好祝愿。有一名字暗示出生的地点、时间或自然现象,如晨(早晨)、冬(冬天);有体现希望具有某种美德,如忠(忠心
TheInternetandcellphonesarebringingpeopletogether,not【C1】______usapart—atleast,accordingtoanewsurveyrecentlyby
Knowledgemaybeacquiredthroughconversation,watchingtelevisionortravelling,butthedeepestandmostconsistentwayisth
Thelocaleducationauthoritycompiledalistof"potentialsecurityproblems"oncampuslastweek.Theyincludefireaccidents,
TheU.S.governmentisaskingAmericanstoeatlessandexercisemoreinanefforttostemthecountry’sincreasingepidemicof
TheNewestAddictionsonCampusAPrincetonfreshman,JohnEssenburgkepthimselfawakeforall-nightvideogamebingesbys
ImportanceofBuyingaHouse1.有人认为买房很重要2.也有人认为买不买房无关紧要3.我认为…
A、Todescribewayspestscandamageplants.B、Toexaminethelifecycleofcornplants.C、Toexplainhowcornplantsdevelop.D、
A、Readingmagazinearticles.B、Reviewingbookreports.C、Writingresearchpapers.D、Selectinginformationsources.C选项均以一ing形式开头
随机试题
下列选项中,属于完成形态统计指标的是()。
具有疏肝解郁,宁心安神功效的药物是()具有养阴益血,宁心安神功效的药物是()
病房内火灾探测器数量最少为:
下列属于建筑材料采购合同中验收依据的有()
下列对税务部门统一印制的增值税专用发票的描述中,正确的是()。
下列不属于操作风险损失事件收集工作应坚持的原则的是()。
在变革解体阶段,整个过程有四项要求,以下各项中,不属于这四项要求的是()。
材料:某教师在“消化和吸收”一节课的教学中,关于“胃的功能”讲解中,表述为“胃像磨粉机一样把食物给磨碎了”,显然这样表述是不准确的,因为胃除了具有物理消化功能外,还有化学消化功能,磨粉机只能比喻物理消化功能。课堂教学中讲解技能用语要注意规范、严谨和科学。根
简述对理性形成的三个逐步放松的条件。
如下图所示,主机A发送数据包给B,在数据包经过路由器转发的过程中,下列封装在数据包3中的目的IP地址和目的MAC地址,正确的是
最新回复
(
0
)