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【medical-news】Violent video game effects linger in brain
11/29/2006
By: Reuters Health
http://www.auntminnie.com/index.asp?Sec=sup&Sub=mri&Pag=dis&ItemId=73761
CHICAGO (Reuters), Nov 29 - Teens who play violent video games show increased activity in areas of the brain linked to emotional arousal and decreased responses in regions that govern self-control, a study released on Tuesday found.
The study used functional magnetic resonance imaging to record tiny metabolic changes in brain activity in 44 adolescents who were asked to perform a series of tasks after playing either a violent or nonviolent video game for 30 minutes.
The children, with no history of behavior problems, ranged in age from 13 to 17. Half played a T-rated first-person shooter game called "Medal of Honor: Frontline," involving military combat, while the other group played a nonviolent game called "Need for Speed: Underground."
Those who played the violent video game showed more activation in the amygdala, which is involved in emotional arousal, and less activation in the prefrontal portions of the brain associated with control, focus, and concentration than the teens who played the nonviolent game.
"Our study suggests that playing a certain type of violent video game may have different short-term effects on brain function than playing a nonviolent, but exciting, game," said Dr. Vincent Mathews, a professor of radiology at Indiana University School of Medicine in Indianapolis and the study's author.
After playing the games, the children completed tasks requiring concentration and processing of emotional stimuli while their brain activity was scanned. Alterations in brain function reflecting changes in blood flow appeared as brightly colored areas on the magnetic resonance images.
"What we showed is there is an increase in emotional arousal. The fight-or-flight response is activated after playing a violent video game," Mathews said.
The findings were presented at the annual meeting of the Radiological Society of North America in Chicago.
The $13 billion U.S. video game industry, with revenue rivaling Hollywood box office sales, is at the center of a cultural battle over violent content. Lawmakers' various attempts to ban the sale of violent video games to children have been blocked by courts in Louisiana, Illinois, California. Michigan, and Minnesota.
Video games with a T-rating (for teen) are considered suitable for ages 13 and older. They may contain violent content, strong language, or suggestive themes.
Numerous behavioral and cognitive studies have linked exposure to violent media and aggressive behavior. Now, researchers are using advanced imaging technology to scan the brain for clues to whether violent video games cause increases in aggression.
Mathews said he hopes to conduct additional studies on the long-term effects on brain function of exposure to violent video games.
By Susan Kelly
Last Updated: 2006-11-28 16:27:30 -0400 (Reuters Health) 本人已认领该文编译，48小时后若未提交译文，请其他战友自由认领。 英文2513，不含空格
Violent video game effects linger in brain
暴力视频游戏影响大脑
11/29/2006
By: Reuters Health
http://www.auntminnie.com/index.asp?Sec=sup&Sub=mri&Pag=dis&ItemId=73761
CHICAGO (Reuters), Nov 29 - Teens who play violent video games show increased activity in areas of the brain linked to emotional arousal and decreased responses in regions that govern self-control, a study released on Tuesday found.
芝加哥（路透社）11.29－在周二发表的一项研究显示，玩暴力视频游戏的青少年大脑情绪激发区域活动增加，而自我控制区域反应降低。
The study used functional magnetic resonance imaging to record tiny metabolic changes in brain activity in 44 adolescents who were asked to perform a series of tasks after playing either a violent or nonviolent video game for 30 minutes.
这项研究使用磁共振机能成像技术来观测44名青少年大脑活动中的细微代谢变化，这些少年在玩30分钟的暴力或非暴力视频游戏后被要求执行一系列的任务。
The children, with no history of behavior problems, ranged in age from 13 to 17. Half played a T-rated first-person shooter game called "Medal of Honor: Frontline," involving military combat, while the other group played a nonviolent game called "Need for Speed: Underground."
这些年轻人年龄在13－17岁，没有任何不良记录。其中一半玩T级别的叫“奖牌荣誉：前线”第一人称射击游戏，里面有军队战斗，而另一组玩非暴力游戏：“地下狂速”。
Those who played the violent video game showed more activation in the amygdala, which is involved in emotional arousal, and less activation in the prefrontal portions of the brain associated with control, focus, and concentration than the teens who played the nonviolent game.
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作者:admin@医学,生命科学 2011-06-05 20:46
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