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添加时间:2017-08-28 19:37:55 浏览次数: 作者:未知
  • According to new US research filling up on leafy green vegetables could be a factor in keeping your brain healthy later in life, thanks to a nutrient1 called lutein. Carried out by the University of Illinois, the researchers set out to see if there was a notable difference in cognitive2 function between younger and middle-age participants with higher and lower lutein levels.


    Most previous studies have looked at lutein levels in older adults, after there has already been a period of cognitive decline, however the new study recruited 60 participants aged 25 to 45.


    "As people get older, they experience typical decline. However, research has shown that this process can start earlier than expected. You can even start to see some differences in the 30s," said Anne Walk, first author of the paper. "We want to understand how diet impacts cognition throughout the lifespan. If lutein can protect against decline, we should encourage people to consume lutein-rich foods at a point in their lives when it has maximum benefit."

    "随着人们年龄的增长,他们会经历一些典型的衰退。然而,研究表明:这一过程可能比预期更早。有些人30岁的时候就能看出差异了,"该文章的第一作者安妮·沃克(Anne Walk)说道。"我们想要了解在整个生命周期中,饮食对人们认知的影响。如果叶黄素能防止认知功能衰退,我们就应该鼓励人们在生命中的某个阶段多吃一些富含叶黄素的食物,因为这个阶段能带来最大的益处。"

    Lutein is a nutrient that the body can't make on its own but it can be acquired through diet. As well as green leafy vegetables such as spinach3 and kale, it is also found in foods such as avocados and eggs. To measure levels of the nutrient in the participants the researchers looked at the participants' eyes, where lutein accumulates in the tissue, asking them look into a scope and respond to a flickering4 light.


    While the participants performed a task to measure their attention, the researchers used electrodes on the scalps to measure neural5 activity in the brain.


    The results showed that, "The neuro-electrical signature of older participants with higher levels of lutein looked much more like their younger counterparts than their peers with less lutein," explained Walk, adding that, "Lutein appears to have some protective role, since the data suggest that those with more lutein were able to engage more cognitive resources to complete the task."


    "Now there's an additional reason to eat nutrient-rich foods such as green leafy vegetables, eggs and avocados," concluded Naiman Khan, a professor of kinesiology and community health at Illinois. "We know these foods are related to other health benefits, but these data indicate that there may be cognitive benefits as well."


     8级    英文科普 
     单词标签: nutrient  cognitive  spinach  flickering  neural 


    1 nutrient [ˈnju:triənt] 3vpye   第8级
    • Magnesium is the nutrient element in plant growth. 镁是植物生长的营养要素。
    • The roots transmit moisture and nutrient to the trunk and branches. 根将水分和养料输送到干和枝。
    2 cognitive [ˈkɒgnətɪv] Uqwz0   第7级
    • As children grow older, their cognitive processes become sharper. 孩子们越长越大,他们的认知过程变得更为敏锐。
    • The cognitive psychologist is like the tinker who wants to know how a clock works. 认知心理学者倒很像一个需要通晓钟表如何运转的钟表修理匠。
    3 spinach [ˈspɪnɪtʃ] Dhuzr5   第10级
    • Eating spinach is supposed to make you strong. 据说吃菠菜能使人强壮。
    • You should eat such vegetables as carrot, celery and spinach. 你应该吃胡萝卜,芹菜和菠菜这类的蔬菜。
    4 flickering ['flikəriŋ] wjLxa   第9级
    • The crisp autumn wind is flickering away. 清爽的秋风正在吹拂。
    • The lights keep flickering. 灯光忽明忽暗。
    5 neural [ˈnjʊərəl] DnXzFt   第10级
    • The neural network can preferably solve the non-linear problem. 利用神经网络建模可以较好地解决非线性问题。
    • The information transmission in neural system depends on neurotransmitters. 信息传递的神经途径有赖于神经递质。

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