人脑如何识别处理面部信息-凯发k8官网

人脑如何识别处理面部信息
文章来源:未知 文章作者:enread 发布时间:2011-03-17 03:36 字体: [ ] 
(单词翻译:双击或拖选)

it is no surprise to scientists that the largest social network on the web is called facebook. identifying people by their face is fundamental to our social interactions, one of the primary reasons vision researchers are trying to find out how our brain processes facial identity. in a study recently published in the journal of vision, scientists used an original approach — a method that "shakes" the brain gently and repeatedly by making an image appear and disappear at a constant rate — to evaluate its sensitivity to perceiving facial identity. the technique is called steady-state visual 1 potential (ssvep稳态视觉诱发电位).

"if we measure global human brain activity when one face is viewed, it cannot be 2 from brain activity when another face is viewed," said author bruno rossion, phd, a researcher at the institute of 3 and institute of neuroscience, université catholique de louvain, belgium. "this is why we relied on a method in which brain activity is compared between repetition(重复,背诵) of the same face and the presentation of different faces in succession."

during the experiment, 12 participants were presented with a series of faces appearing at a frequency of 3.5 faces per second. the result showed the brain signal at that specific frequency only was much larger when a sequence of different faces was presented at that rate than when an identical face was repeated.

the research team was 4 surprised by the resulting large size of the difference between the two conditions, obtained only after one minute and a half of testing, and was equally astonished that the difference in conditions did not exist when the faces were 5(颠倒) . the study also confirmed that the region for face perception lies primarily in the posterior part of the brain's right hemisphere.

the ability to recognize a face is a common problem in cases of sudden 6 of posterior(其次的) brain damage, neurodegenerative 7 like alzheimer disease and other forms of dementia and social disorders such as autism. rossion points out that an advantage of using this highly sensitive ssvep methods is that it can be used and compared objectively in different human populations — adults, infants, children, neurological patients, people with long-life face recognition impairments or autism - without requiring complex instructions and a long testing duration.

"face recognition involves the most complex aspects of perception and memory and, for this reason, understanding how it works has large-scale implication," rossion adds. "ultimately, through a better understanding of this function, we will make tremendous progress in our understanding of how the brain works in general, develop tools to detect its dysfunction(功能紊乱) and hopefully help remedy it."



点击收听单词发音收听单词发音  

1 0681b342def6d2a4206d965ff12603b2     
[医]诱发的
参考例句:
  • the music evoked memories of her youth. 这乐曲勾起了她对青年时代的回忆。
  • her face, though sad, still evoked a feeling of serenity. 她的脸色虽然悲伤,但仍使人感觉安详。
2 83b7560ad714d20d3b302f7ddc7af15a     
区分,区别,辨别( differentiate的过去式和过去分词 ); 区别对待; 表明…间的差别,构成…间差别的特征
参考例句:
  • the development of mouse kidney tubules requires two kinds of differentiated cells. 小鼠肾小管的发育需要有两种分化的细胞。
  • in this enlargement, barley, alfalfa, and sugar beets can be differentiated. 在这张放大的照片上,大麦,苜蓿和甜菜都能被区分开。
3 u0wze     
n.心理,心理学,心理状态
参考例句:
  • she has a background in child psychology.她受过儿童心理学的教育。
  • he studied philosophy and psychology at cambridge.他在剑桥大学学习哲学和心理学。
4 vptxw     
adv.明确地,断然,坚决地;实在,确实
参考例句:
  • she was positively glowing with happiness.她满脸幸福。
  • the weather was positively poisonous.这天气着实讨厌。
5 184401f335d6b8661e04dfea47b9dcd5     
adj.反向的,倒转的v.使倒置,使反转( invert的过去式和过去分词 )
参考例句:
  • only direct speech should go inside inverted commas. 只有直接引语应放在引号内。
  • inverted flight is an acrobatic manoeuvre of the plane. 倒飞是飞机的一种特技动作。 来自《简明英汉词典》
6 bicxf     
n.进攻,袭击,开始,突然开始
参考例句:
  • the drug must be taken from the onset of the infection.这种药必须在感染的最初期就开始服用。
  • our troops withstood the onset of the enemy.我们的部队抵挡住了敌人的进攻。
7 6e49dcafe3638183c823d3aa5b12b010     
n.混乱( disorder的名词复数 );凌乱;骚乱;(身心、机能)失调
参考例句:
  • reports of anorexia and other eating disorders are on the increase. 据报告,厌食症和其他饮食方面的功能紊乱发生率正在不断增长。 来自《简明英汉词典》
  • the announcement led to violent civil disorders. 这项宣布引起剧烈的骚乱。 来自《简明英汉词典》
tag标签: face human brain
发表评论
请自觉遵守互联网相关的政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
验证码:点击我更换图片
网站地图