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
Some people have a more complicated sensory life than others. Most taste tuna only when they eat it. A few, though, taste it whe
Some people have a more complicated sensory life than others. Most taste tuna only when they eat it. A few, though, taste it whe
admin
2016-10-21
27
问题
Some people have a more complicated sensory life than others. Most taste tuna only when they eat it. A few, though, taste it when they hear a particular word, such as "castanet". Others link the color red with the letter " S" or make some other inappropriate connection between stimulus and response. Such people are known as synaesthetes, and the phenomenon of synaesthesia has puzzled brain scientists since it Was recognized over a century ago.
Most researchers in the field suspect synaesthesia is caused by crossed wires in synaesthetes’ brains, but until recently they have had no way to check this hypothesis. However, the development of a technique called diffusion-tensor imaging has changed that. And researchers at the University of Amsterdam have just applied it to the brains of 18 women(the sex more likely to experience synaesthesia)who have the most common form of the condition. This is called grapheme-color synaesthesia. It is a tendency to see letters and numbers in color.
Diffusion-tensor imaging measures the direction of movement of water molecules. Since the filaments that connect distant nerve cells are surrounded by fatty sheaths which restrict the movement of water, such molecules tend to move along a filament rather than out of it. The upshot is that the technique can detect bundles of such filaments running from one part of the brain to another.
The grapheme-color synaesthesia was chosen to study for two reasons. One was that it is common. The other was because there is a specific hypothesis as to its cause. Earlier brain-scanning studies have shown that the part of the brain which identifies word shape is in an area called the fusiform gyrus. This is next to an area known as V4, which identifies color. Both light up simultaneously in traditional scanners when someone is experiencing grapheme-color synaesthesia, so an inappropriate link between them is an obvious thing to look for.
Diffusion-tensor imaging did, indeed, show strong connections between these two areas in the brains of the synaesthetes when they slid into the scanner and viewed color-evoking letters and numbers. Other unusual connections showed up too, suggesting the phenomenon is more complex than had been appreciated. By contrast, the brains of 18 non-synaesthetes matched with the volunteers by age and sex showed no such strong connections.
And the revelations went further. Certain types of grapheme-color synaesthetes have more connectivity than others. As part of the study, researchers asked volunteers to fill out questionnaires about how they experience their color sensations. Some reported seeing color projected on to whatever word or number they were shown. Members of this group are known as "projectors". Others, known as "associators" , reported color only in their mind’s eye. Although both groups of synaesthetes had much more connectivity than non-synaesthetes, projectors had noticeably more again than associators.
Researchers are not yet sure what form the stronger connections take. They could be the result of more filaments than normal connecting the areas in question. Or the filaments might be broader than normal. Or the fatty coatings of the filaments might be thicker, which would amplify the signal passing along them as well as keeping water molecules on the straight-and-narrow.
How synaesthesia starts is also unclear. There is evidence of a genetic component but learning must be involved as well. People are not born with the concept of the letter " A". And they certainly are not born with a bright-red, cherry-colored "A" — however much it feels, as synaesthetes insist, as though they were.
"... the development of a technique called diffusion-tensor imaging has changed that" suggests that______.
选项
A、technological development has figured out the cause for synaesthesia
B、technological development has proved the hypothesis that synaesthesia is caused by crossed wires in brains
C、technological development has rejected the hypothesis that synaesthesia is caused by crossed wires in brains
D、technological development has made hypothesis checking possible
答案
D
解析
推断题。从该句的前一句得知先前无法检验该假设,直到引进新的技术手段diffusion-tensor imaging。本句并未直接指出新技术手段证实了还是推翻了假设,只是说新技术手段的出现改变了先前无法检验的状况,故选D。
转载请注明原文地址:https://kaotiyun.com/show/8k7O777K
0
专业英语八级
相关试题推荐
Somedeviantusesoftechnologyarecriminal,thoughnotallparticipantsseeitthatway.Downloadingofmusic,typicallyprot
______maylayclaimtothetitle"BirthplaceoftheIndustrialRevolution"becauseitwasherethatpeoplelikeWatt,Boulton,a
______wontheNobelPrizeforliteraturewithhisnovels,TheGrapesofWrath,InDubiousBattle,OfMiceandMen,forhisreali
ArecentstudybyGermanresearcherspresentsthepossibilityof"carbonfarming"asalessriskyalternativetoothercarbonca
ArecentstudybyGermanresearcherspresentsthepossibilityof"carbonfarming"asalessriskyalternativetoothercarbonca
Unfortunately,thecheapalternativesareevenmoreharmfulthantheillicitdrugstheyreplace.
我想不起来哪一个熟人没有手机。今天没有手机的人是奇怪的,这种人才需要解释。我们的所有社会关系都储存在手机的电话本里,可以随时调出使用。古代只有巫师才能拥有这种法宝。手机刷新了人与人的关系。会议室门口通常贴着一条通告:请与会者关闭手机。可是会议室里
Thisisaperiodinwhichtheoldworldisslowlybutirreversiblychangingandthecontoursofanewonearejustbeginningto
A、Ugh!B、Whew!C、Yum-yum!D、Alas!C根据原文,主持人显然觉得现场的素食都挺好吃的,因此选C。A表示厌恶,B表示如释重负,D表示遗憾或不幸。
随机试题
额颞痴呆和Pick症Alzheimer病
小微,女,3岁,误服灭鼠药物(磷化锌)后,被送至医院抢救,护士立即实施抢救工作。洗胃过程中若有血性液体流出,应采取的护理措施是
A.火焰灭菌B.辐射灭菌C.流通蒸汽灭菌D.热压灭菌E.甲醛溶液加热熏蒸无菌室空气灭菌
治疗小儿乳食内积型积滞的首选方剂是
侵权与违约竞合的期货纠纷案件,当事人既以违约又以侵权起诉的,既可以依侵权之由确定管辖,也可以依违约之由确定管辖。( )
甲在空调生产上使用“橘子”注册商标。根据商标的分类,甲的“橘子”商标能够被归入的商标类型有()。
有关ETF和LOF的区别,下列说法正确的是()。
一博士研究生给心理医生写信,说到:“前不久,我写了篇很有价值的论文,我相信,它会在学术界产生极大的轰动。但我的导师们对我的文章不以为然,还千方百计地阻碍它早日脱稿。我知道,他们是嫉妒我的才能,他们怕我的文章出来,自己脸上无光。其实,这正说明他们固步自封。不
到游泳池深水区游泳,只需要具备两个条件:一是戴泳帽,二是持有深水游泳证。小王戴着泳帽到深水区游泳,被工作人员阻止。根据以上条件,下列判断必定为真的是:
A)TheSupremeCourtunambiguouslyruledWednesdaythatprivacyrightsarenotsacrificedto21stcenturytechnology,sayinguna
最新回复
(
0
)