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
医学
Whether the cause is maternal anti-bodies, heavy metals or something else, there is no question that the brains of young childre
Whether the cause is maternal anti-bodies, heavy metals or something else, there is no question that the brains of young childre
admin
2013-11-30
82
问题
Whether the cause is maternal anti-bodies, heavy metals or something else, there is no question that the brains of young children with autism have unusual features. To begin with, they tend to be too big. In studies based on magnetic resonance imaging(MRI)and basic tape-measure readings , neuroscientist Eric Courchesne at Children’ s Hospital of San Diego showed that while children with autism are born with ordinary-size brains, they experience a rapid expansion by age 2—particularly in the frontal lobes. By age 4, says Courchesne, autistic children tend to have brains the size of a normal 13-year-old. More recent studies by Admiral and others have found that the amygdale, an area associated with social behavior, is also oversize, a finding Admiral believes is related to the high levels of anxiety seen in as many as 80% of people with autism.
Harvard pediatric neurologist Dr. Martha Herbert reported last year that the excess white matter in autistic brains has a specific distribution; local areas tend to be over connected, while links between more distant regions of the brain are weak. The brain’ s right and left hemispheres are also poorly connected. It’ s as if there are too many competing local services but no long distance.
This observation
jibes
neady with imagining studies that look at live brain activity in autistic people. Studies using functional MRI show a lack of coordination among brain regions, says Marcel Just, director of Carnegie Mellon’ s Center for Cognitive Brain Imaging in Pittsburgh, Pa. Just has scanned dozens of 15-to-35-year-old autistic people with IQs in the normal range, giving them thinking tasks as he monitors their brain activity. " One thing you see," says Just, " is that activity in different areas is not going up and down at the same time. There’ s a lack of synchronization, sort of like a difference between a jam session and a string quartet. In autism, each area does its own thing. "
What remains unclear is whether the interconnectivity problem is the result of autism or its cause. "It’ s impossible to tell the chicken from the egg at this point," Just says. Autistic people have been shown to use their brains in unusual ways; they memorize alphabet characters in apart of the brain that ordinarily processes shapes. They tend to use the visual centers in the back of the brain for tasks usually handled by the prefrontal cortex. They often look at the mouth instead of the eyes of someone who is speaking. Their focus, says psychologist Ami Klin of Yale’ s Child Study Center, is " not on the social allegiances—for example, the longing gaze of a mother—but physical allegiances—a mouth that moves. "
According to Marcel Just, autistic people have been shown to use their brains in unusual ways EXCEPT that______.
选项
A、they memorize alphabet characters in a part of the brain that processes shapes
B、they tend to use the visual centers for tasks usually handled by the prefrontal cortex
C、they often look at the mouth instead of the eyes of someone who is speaking
D、their locus is on the expression of communicators
答案
D
解析
文中最后一段:Autistic people have been shown to use their brains in unusual ways:后面分别列举了A、B、C选项,而D选项与C项矛盾,所以不是孤独症患者与常人的不同。
转载请注明原文地址:https://kaotiyun.com/show/i3U3777K
本试题收录于:
医学博士外语题库考研分类
0
医学博士外语
考研
相关试题推荐
Imagineadiseasespreadingacrosstheglobe,killingmostlymiddle-agedpeopleorleavingthemchronicallydisabled.Thenoned
Ihadneverbeeninthepublicwardofahospitalbefore,anditwasmyfirstexperienceofdoctorswhohandleyouwithoutspeak
Youcannotburdenyourmemorywithtoomuchinformation.
A、Acoupleofyears.B、Morethan5years.C、Acoupleofmonths.D、Approximately5years.C由医生的话it’samatterofmonthsratherth
FormonthsGinaCruz,aManilagrandmother,playedPepsiCola’s"NumbersFever"promotionlottery,buyingseveralbottlesaday
A、Sheneedsaphysicalexamination.B、Sheisingoodhealth.C、It’sgoodtohaveadoctorfriend.D、It’sgoodtovisitthedocto
Patientscanrecallwhattheyhearwhileundergeneralanestheticeveniftheydon’twakeup,concludesanewstudy.Several
A、Somewhatimpolite.B、Sometimespossible.C、Alwaystoodifficultajobtodo.D、Somethingoneoughttodo.B作者认为给他人提出怎样生活的建议有时是
Thehumannoseisanunderratedtool.Humansareoftenthoughttobeinsensitivesmellerscomparedwithanimals,butthisislar
Exerciseisgoodforpeople,butmostpeoplereallyknowverylittleabouthowtoexerciseproperly.Sowhenyoutry,youmayru
随机试题
在一定接触时间内,一定反应温度和反应物配比下,主反应的转化率愈高,说明催化剂的活性愈好。
划分固定资本和流动资本的根据是
急性喉炎的主要症状是
依据施工合同示范文本规定,工程竣工验收报告经发包人认可后( )天,承包人向发包人递交竣工结算报告及完整的结算资料。
一般来讲,很难严格地将投资与投资规划分离开来。概括起来二者的区别可以体现在()。
在证券投资组合中,为分散利率风险应选择()。
若儿童的心理年龄高于其生理年龄,则智力较一般儿童高,若心理年龄低于其生理年龄,则智力较一般儿童低。但在实践中发现,单纯用心理年龄来表示智力高低的方法缺乏不同()儿童间的可比性。
已知数列{an}满足a1=2,an+1=(n∈N*).求a1.a2.a3.….a1602.
俗话说“一寸光阴一寸金”。这里的“一寸”是古代计时器()量出的时间单位。
InanuncriticalAugust11,1997,WorldNewsTonightreporton"diamagnetictherapy,"aphysicaltherapistexplainedthat"magn
最新回复
(
0
)