The 41 obese volunteers who declined the surgery ended up with even worse results.
41个肥胖志愿者拒绝这个手术后，成绩变得更差。
Professor John Gunstad, of Kent State University, Ohio, said the research showed obesity can damage the brain, ‘especially the parts most important for paying attention and learning new things’.
俄亥俄州科特州立大学的John Gunstad教授称，研究表明肥胖会伤害大脑，“尤其是关注和学习新事物的最主要部分。”
In the study the researchers also used magnetic resonance imaging to see inside their subjects’ brains.
研究中，研究人员还利用磁共振成像技术来看测试者的大脑内部。
The obese subjects tended to have damage to a particular substance that surrounds and insulates nerve fibres in the brain, suggesting that substance is needed for optimal cognitive function.
肥胖患者容易破坏大脑中围绕和隔离神经纤维的特殊物质，并表明是最佳认知功能所需要的物质。