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60秒科学:Diet and the Brain

时间:2010-10-14 07:53来源:互联网 提供网友:vj3216   字体: [ ]
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Diet and the Brain

A study in the Proceedings1 of the National Academy of Sciences finds that brain chemicals linked to addiction2 are in play with a high-sugar diet, and a study in the Archives of Internal Medicine shows that a high-carb diet had lasting3 mood-elevation effects. Cynthia Graber reports


What you eat affects more than physical health. Two new studies have added to the growing evidence linking the stomach and the brain.

In a report in the Proceedings of the National Academy of Sciences, researchers studied how junk food can trigger addiction behaviors. The brain chemical corticotropin-releasing-factor, CRF, is linked to motivation, and plays a role in drug and alcohol withdrawal4 and relapse. Researchers had rats eat normal food, then binge on sugar and chocolate-flavored snacks. When the rats went off the junk, they expressed CRF, just as do rats going through withdrawal. The rodents5 also had more anxiety and were less interested in normal food.

Another study, published in the Archives of Internal Medicine, looked at human moods. Researchers followed 106 overweight people. Half followed a low-carb, very high-fat diet, and half ate a high-carbohydrate, low-fat diet. After a year, both groups averaged about 30 pounds weight loss. And though both groups’ moods improved after two months, only the low-fat, high-carb group kept up the good feelings. So what we eat doesn’t just go to our waists—it also goes to our brains.
 


点击收听单词发音收听单词发音  

1 proceedings Wk2zvX     
n.进程,过程,议程;诉讼(程序);公报
参考例句:
  • He was released on bail pending committal proceedings. 他交保获释正在候审。
  • to initiate legal proceedings against sb 对某人提起诉讼
2 addiction JyEzS     
n.上瘾入迷,嗜好
参考例句:
  • He stole money from his parents to feed his addiction.他从父母那儿偷钱以满足自己的嗜好。
  • Areas of drug dealing are hellholes of addiction,poverty and murder.贩卖毒品的地区往往是吸毒上瘾、贫困和发生谋杀的地方。
3 lasting IpCz02     
adj.永久的,永恒的;vbl.持续,维持
参考例句:
  • The lasting war debased the value of the dollar.持久的战争使美元贬值。
  • We hope for a lasting settlement of all these troubles.我们希望这些纠纷能获得永久的解决。
4 withdrawal Cfhwq     
n.取回,提款;撤退,撤军;收回,撤销
参考例句:
  • The police were forced to make a tactical withdrawal.警方被迫进行战术撤退。
  • They insisted upon a withdrawal of the statement and a public apology.他们坚持要收回那些话并公开道歉。
5 rodents 1ff5f0f12f2930e77fb620b1471a2124     
n.啮齿目动物( rodent的名词复数 )
参考例句:
  • Rodents carry diseases and are generally regarded as pests. 啮齿目动物传播疾病,常被当作害虫对待。 来自《简明英汉词典》
  • Some wild rodents in Africa also harbor the virus. 在非洲,有些野生啮齿动物也是储毒者。 来自辞典例句
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TAG标签:   60秒科学  corticotropin  60秒科学
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