当前位置: Language Tips> 双语新闻

你的大脑能“招架”多少朋友?

How many friends can your brain handle?

中国日报网 2013-11-26 09:25

分享到

 

你的大脑能“招架”多少朋友?

查看原文

Being a social butterfly just might change your brain: In people with a large network of friends and excellent social skills, certain brain regions are bigger and better connected than in people with fewer friends, a new study finds.

The research, presented here Tuesday (Nov. 12) at the annual meeting of the Society for Neuroscience, suggests a connection between social interactions and brain structure.

"We're interested in how your brain is able to allow you to navigate in complex social environments," study researcher MaryAnn Noonan, a neuroscientist at Oxford University, in England, said at a news conference. Basically, "how many friends can your brain handle?" Noonan said.

Scientists still don't understand how the brain manages human behavior in increasingly complex social situations, or what parts of the brain are linked to deviant social behavior associated with conditions like autismand schizophrenia.

Studies in macaque monkeys have shown that brain areas involved in face processing and in predicting the intentions of others are larger in animalsliving in large social groups than in ones living in smaller groups.

To investigate these brain differences in humans, Noonan and her colleagues at McGill University, in Canada, recruited 18 participants for a structural brain-imaging study. They asked people how many social interactions they had experienced in the past month, in order to determine the size of their social networks.

As was the case in monkeys, some brain areas were enlarged and better connectedin people with larger social networks. In humans, these areas were the temporal parietal junction, the anterior cingulate cortex and the rostral prefrontal cortex, which are part of a network involved in "mentalization"—the ability to attribute mental states, thoughts and beliefs to another.

"These different brain regions are all singing different songs," Noonan said. "Networked areas are all singing the same song, and when they're connected better, they're singing more harmoniously with each other."

The researchers also tested whether the size of a person's social networkwas linked with changes in white-matter pathways, the nerve fibers that connect different brain regions.

Again, they found that white-matter tracts were better connected in people with bigger social networks. "The nerves were more like a Los Angeles freeway than a country road," Noonan said.

The researchers couldn't say whether social interaction caused these changes in brain structure and connectivity, or whether the brain determined how innately social someone was.

In the case of the monkeys, the researchers dictated the size of the animals' social network, so they concluded that social-group size was causing the brain differences.

It can be inferred that a similar process takes place in human brains, but to prove this, long-term studies are needed, Noonan told LiveScience.

The fact that some brain regions may be larger and more connected suggests other regions might be smaller in the brains of the more socially adept, Noonan said.

"If you're spending a lot of time in social environments using social skills and your brain's changing, maybe you're not learning to juggle in your free time or becoming proficient at the piano," she said. "The brain is just changing and optimizing to reflect your needs, and if that is thriving within a complex social environment, that is what your brain is reflecting."

查看译文

一项最新研究发现,成为一名“交际花”可能意味着改变你的大脑:比起朋友少的人,拥有庞大网友圈和杰出社交能力的人的特定大脑区域更大、联络更发达。


11月12日,该研究在神经科学学会的年会上提出,表明社会互动与大脑构造之间的联系。


“我们渴望知道你的大脑如何使你在复杂的社会环境中保持方向感,” 研究员努南在英国的记者招待会上说,她是一名牛津大学的神经学家。简言之,“你的大脑能 ‘招架’多少朋友?” 她说道。


科学家仍不清楚大脑是怎样在日趋复杂的社会环境下管理人类行为,或者说,大脑的哪个部分与异常社会行为有关联,比如孤独症和神经分裂症。


对于猕猴的研究表明,生活在大型社会群体中的猕猴参与面部识别、揣测他人意图的大脑功能区较大。



为研究人类大脑的这些差异,努南和她在加拿大麦吉尔大学的同事招募了18名参与者展开了一项结构性脑成像研究。他们询问参与者在过去的一个月内参与了多少社交活动,以确定他们社交网络的大小。



与猴子实验结果相符,拥有较大社交圈的人们通常有更大的、联络更发达的大脑。对人类而言,这些区域是颞顶叶交界处、前扣带皮质和侧前额叶皮层,这是部分参与实现“心理化”的神经系统——即分配精神状态、思想和信仰的能力。



“不同的大脑区域分工协作,” 努南说,“神经系统整体步调一致,并且当他们联络得更好时,这种协同合作更和谐。”



研究人员还测试了一个人的社交网络是否与白质通路的改变有关,也就是连接大脑不同区域的神经纤维。


再一次,他们发现拥有更大社交圈子的人的白质纤维束联络更为发达。“这些神经就像是一条洛杉矶超速干道而不是乡间小路。” 努南说。

研究人员还不能确认社会互动是否导致了大脑结构和连通性的改变,或者大脑是否决定了一个人与生俱来的社交能力的高低。


在猴子的案例中,研究者记录了动物的社交网络规模,因此得出结论,社会群体的大小导致了大脑的差异。


由此推测,人类大脑也经过了类似的过程,但是这仍需长期研究来证明,努南对“生活科学”网站说。

她表示,社交达人特定大脑区域更大、联络更发达的事实还暗示了他们大脑的其他区域可能会更小。


“如果你在社会环境中花很多时间交际,你的大脑就在改变,你可能不会了解平衡自己的空闲时间,或是精通钢琴,”她说,“大脑就是在优化改变以适应你的需要,如果你渴望复杂的社会环境,这恰恰就是你的大脑正在反映的。”

(译者 牛丝雨 编辑 丹妮)

 

分享到

中国日报网英语点津版权说明:凡注明来源为“中国日报网英语点津:XXX(署名)”的原创作品,除与中国日报网签署英语点津内容授权协议的网站外,其他任何网站或单位未经允许不得非法盗链、转载和使用,违者必究。如需使用,请与010-84883561联系;凡本网注明“来源:XXX(非英语点津)”的作品,均转载自其它媒体,目的在于传播更多信息,其他媒体如需转载,请与稿件来源方联系,如产生任何问题与本网无关;本网所发布的歌曲、电影片段,版权归原作者所有,仅供学习与研究,如果侵权,请提供版权证明,以便尽快删除。

中国日报网双语新闻

扫描左侧二维码

添加Chinadaily_Mobile
你想看的我们这儿都有!

中国日报双语手机报

点击左侧图标查看订阅方式

中国首份双语手机报
学英语看资讯一个都不能少!

关注和订阅

本文相关阅读
人气排行
热搜词
 
 
精华栏目
 

阅读

词汇

视听

翻译

口语

合作

 

关于我们 | 联系方式 | 招聘信息

Copyright by chinadaily.com.cn. All rights reserved. None of this material may be used for any commercial or public use. Reproduction in whole or in part without permission is prohibited. 版权声明:本网站所刊登的中国日报网英语点津内容,版权属中国日报网所有,未经协议授权,禁止下载使用。 欢迎愿意与本网站合作的单位或个人与我们联系。

电话:8610-84883645

传真:8610-84883500

Email: languagetips@chinadaily.com.cn