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2013年11月5日 星期二

雙語導讀:耶魯研究 --「飽足感」滯後是肥胖的元兇


Some people find it more difficult to stay slim than others because their brains are slow at recognizing when they are full, a study claims.

  The team at Yale University found that in rats some have nerve endings which are more sluggish at signaling when your stomach is full than others. This means that they overeat slightly at every meal and eventually this leads to obesity.

  The findings add to the growing evidence that it is not always your diet that leads to being overweight but also your genetic inheritance and pre-birth development of the brain. It also explains why two people – or siblings – can consume the same high fat diet but one remains thin while the other puts on weight.

  "It appears that this base wiring of the brain is a determinant of one's vulnerability to develop obesity," said Professor Tamas Horvath, a neurobiologist at Yale University. "These observations add to the argument that it is less about personal will that makes a difference in becoming obese, and, it is more related to the connections that emerge in our brain during development."

  據英國《每日電訊報》82日報導,最新一項研究稱,一些人比別人更容易長胖,原因在於他們對自己吃飽與否的感覺滯後於別人。

  近日耶魯大學研究小組通過研究小白鼠發現,有些小鼠的神經末梢在發送吃飽信號方面要比其他小鼠慢一些。這就意味著它們每餐都會吃得更多一些,最終導致肥胖。

  研究結果更加證明了飲食並不總是導致身材走樣的原因。基因遺傳、產前大腦發育也是決定人們胖瘦的因素。該研究也說明了為什麼兩個人——或者兄弟姐妹——吃著同樣的高脂肪食品,一個卻還是那麼瘦,另一個卻日漸變胖。

  看來大腦基本構造是人們超重的決定因素,耶魯大學神經生物學教授塔瑪斯說道。研究更進一步證實了,個人意願對減肥的作用並不大,起作用更多的還是大腦發育時產生的各種聯繫。” 

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