大脑对密友的反应比陌生人强烈
文章来源:未知 文章作者:meng 发布时间:2010-10-13 03:17 字体: [ ] 
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People's brains are more responsive to friends than to strangers, even if the stranger has more in common, according to a study in the Oct. 13 issue of The Journal of Neuroscience. Researchers examined a brain region known to be involved in processing social information, and the results suggest that social alliances(同盟,联盟) 1(胜过,超过) shared interests. In a study led by graduate student Fenna Krienen and senior author Randy Buckner, PhD, of Harvard University, researchers investigated how the medial prefrontal cortex(前额皮质)betway必威体育官网 and associated brain regions signal someone's value in a social situation. Previous work has shown that perceptions of others' beliefs guide social interactions. Krienen and her colleagues wondered whether these brain regions respond more to those we know, or to those with whom we share similar interests.

"There are psychological and 2(进化的,发展的) arguments for the idea that the social factors of 'similarity' and 'closeness' could get privileged(享有特权的) treatment in the brain; for example, to identify insiders 3 outsiders or 4 versus non-kin," Krienen said. "However, these results suggest that social closeness is the primary factor, rather than social similarity, as 5 assumed."

The researchers first imaged the brain activity of 32 participants as they judged how well lists of adjectives described their 6betway必威体育官网. This helped to identify brain regions that respond to personally relevant information. In separate experiments, 66 different participants provided personality information about themselves and two friends — one friend whom they believed had similar preferences and one believed to be dissimilar.

The authors made up biographies(传记) of similar and dissimilar strangers for each volunteer based on their personality profiles. Then, while in a scanner, they played a game similar to the TV show "The Newlywed Game," in which participants predicted how another person would answer a question. For example, would a friend or stranger prefer an 7betway必威体育官网 or window seat on a flight?

The authors found activity in the medial prefrontal cortex increased when people answered questions about friends. 8, whether the person had common interests made no difference in brain response.

betway必威体育官网"In all experiments, closeness but not similarity appeared to drive responses in medial prefrontal regions and associated regions throughout the brain," Krienen said. "The results suggest social closeness is more important than shared beliefs when evaluating others."

Read Montague, PhD, of Baylor College of Medicine, an expert on decision-making and computational neuroscience, said the study's large number of participants and experimental approach makes it a solid contribution to the field. "The authors address an important 9 of social cognition — the 10 of people close to us," Montague said.



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1 gJlxO     
vt.比...更重,...更重要
参考例句:
  • The merits of your plan outweigh the defects.你制定的计划其优点胜过缺点。
  • One's merits outweigh one's short-comings.功大于过。
2 Ctqz7m     
adj.进化的;演化的,演变的;[生]进化论的
参考例句:
  • Life has its own evolutionary process.生命有其自身的进化过程。
  • These are fascinating questions to be resolved by the evolutionary studies of plants.这些十分吸引人的问题将在研究植物进化过程中得以解决。
3 wi7wU     
prep.以…为对手,对;与…相比之下
参考例句:
  • The big match tonight is England versus Spain.今晚的大赛是英格兰对西班牙。
  • The most exciting game was Harvard versus Yale.最富紧张刺激的球赛是哈佛队对耶鲁队。
4 22Zxv     
n.家族,亲属,血缘关系;adj.亲属关系的,同类的
参考例句:
  • He comes of good kin.他出身好。
  • She has gone to live with her husband's kin.她住到丈夫的亲戚家里去了。
5 bkzzzC     
adv.以前,先前(地)
参考例句:
  • The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
  • Let me digress for a moment and explain what had happened previously.让我岔开一会儿,解释原先发生了什么。
6 ylOzsg     
n. 诽谤,(对某人容貌、性格等所进行的)人身攻击; 人身攻击;人格, 个性, 名人( personality的名词复数 )
参考例句:
  • There seemed to be a degree of personalities in her remarks.她话里有些人身攻击的成分。
  • Personalities are not in good taste in general conversation.在一般的谈话中诽谤他人是不高尚的。
7 qxPz3     
n.(教堂、教室、戏院等里的)过道,通道
参考例句:
  • The aisle was crammed with people.过道上挤满了人。
  • The girl ushered me along the aisle to my seat.引座小姐带领我沿着通道到我的座位上去。
8 1HEx9     
adv.值得注意地,显著地,尤其地,特别地
参考例句:
  • Many students were absent,notably the monitor.许多学生缺席,特别是连班长也没来。
  • A notably short,silver-haired man,he plays basketball with his staff several times a week.他个子明显较为矮小,一头银发,每周都会和他的员工一起打几次篮球。
9 epSzv     
n.组成部分,成分,元件;adj.组成的,合成的
参考例句:
  • Each component is carefully checked before assembly.每个零件在装配前都经过仔细检查。
  • Blade and handle are the component parts of a knife.刀身和刀柄是一把刀的组成部分。
10 gVAxg     
n.中肯,适当,关联,相关性
参考例句:
  • Politicians' private lives have no relevance to their public roles.政治家的私生活与他们的公众角色不相关。
  • Her ideas have lost all relevance to the modern world.她的想法与现代社会完全脱节。
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