lack of sun may dim depressed people's thinking 缺少日照影响-凯发k8官网

lack of sun may dim depressed people's thinking 缺少日照影响
文章来源:未知 文章作者:meng 发布时间:2009-08-30 00:21 字体: [ ] 
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众所周知,日照与情绪息息相关,最明显的例子就是季节性情感障碍——抑郁症的一种,其症状随着季节的变化而不同,通常是患者病情在秋冬季节加重,而光照多的季节得到缓解。但是,光照能影响人们思考和记忆,却是个新话题。根据一项最新的研究显示,经过两周的观察,生活在光照时间短条件下的抑郁症病人,其认知能力低于在光照时间较长气候生活,有同样病症的患者。

a jogger runs at the foothills of the canadian rocky mountains near calgary, alberta november 20, 2007.
a jogger runs at the foothills of the canadian rocky mountains near calgary, alberta november 20, 2007.

a lack of sunshine may cloud memory and other thinking or "1" functions in some people with depression, a new study hints.

there is a well-known association between sunlight exposure and mood, the clearest example being 2 affective 3 (sad) -- a form of depression in which symptoms shift with the seasons, usually arising in the late fall and winter and improving in sunnier months.

but little is known about whether sunshine can affect thinking and memory.

for the new study, researchers at the university of alabama at birmingham looked at the 4 between nasa weather data and cognitive-test scores among more than 14,000 u.s. adults age 45 and older. all had taken part in a government study of stroke risk factors.

the researchers found that among people who had screened positive for depression, those who had been exposed to little sunshine over a two-week period tended to have lower cognitive scores than their counterparts who lived in sunnier climes.

5 adults from the least sunny areas were more than twice as likely to have impairments in memory and other cognitive functions as those with the greatest sun exposure.

the sunshine-cognition link was not seen in adults without depression, however.

the findings, published in the journal environmental health, do not prove that a lack of sun 6 depressed people's thinking -- or that 7 in the sun will improve the situation.

"you obviously don't want to take any actions based on one study," lead researcher shia t. kent, a ph.d. candidate at the alabama university, told reuters health.

but in theory, he said, sunlight might affect cognition through the same pathways it is thought to impact mood. sun exposure helps regulate levels of two 8, melatonin and serotonin, that affect mood and are suspected of playing a role in sad and general depression.

recent research suggests that melatonin and serotonin are also involved in cognition.

"it may be that people who are more 9 by sunlight exposure in terms of depression are also more affected in terms of cognition," kent speculated.

the findings also raise the possibility that light therapy, which is a standard treatment for sad, might improve depressed individuals' cognition as well.

kent said that future studies of sad patients, including those testing light therapy, should look at any potential effects on cognition.

vocabulary:

bask: 晒太阳

cognition: 认知



点击收听单词发音收听单词发音  

1 uqwz0     
adj.认知的,认识的,有感知的
参考例句:
  • 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。
2 lz1xe     
adj.季节的,季节性的
参考例句:
  • the town relies on the seasonal tourist industry for jobs.这个城镇依靠季节性旅游业提供就业机会。
  • the hors d'oeuvre is seasonal vegetables.餐前小吃是应时蔬菜。
3 et1x4     
n.紊乱,混乱;骚动,骚乱;疾病,失调
参考例句:
  • when returning back,he discovered the room to be in disorder.回家后,他发现屋子里乱七八糟。
  • it contained a vast number of letters in great disorder.里面七零八落地装着许多信件。
4 rogzg     
n.相互关系,相关,关连
参考例句:
  • the second group of measurements had a high correlation with the first.第二组测量数据与第一组高度相关。
  • a high correlation exists in america between education and economic position.教育和经济地位在美国有极密切的关系。
5 xu8zp9     
adj.沮丧的,抑郁的,不景气的,萧条的
参考例句:
  • when he was depressed,he felt utterly divorced from reality.他心情沮丧时就感到完全脱离了现实。
  • his mother was depressed by the sad news.这个坏消息使他的母亲意志消沉。
6 866bc0da43dd90e04b6073750ff1e87c     
v.损害,削弱( impair的第三人称单数 )
参考例句:
  • smoking impairs our health. 吸烟会损害我们的健康。 来自《简明英汉词典》
  • almost anything that impairs liver function can cause hepatitis. 任何有损于肝功能的因素,几乎都会引起肝炎。 来自辞典例句
7 7596d7e95e17619cf6e8285dc844d8be     
v.晒太阳,取暖( bask的现在分词 );对…感到乐趣;因他人的功绩而出名;仰仗…的余泽
参考例句:
  • we sat basking in the warm sunshine. 我们坐着享受温暖的阳光。
  • a colony of seals lay basking in the sun. 一群海豹躺着晒太阳。 来自《简明英汉词典》
8 hormones     
n. 荷尔蒙,激素 名词hormone的复数形式
参考例句:
  • this hormone interacts closely with other hormones in the body. 这种荷尔蒙与体內其他荷尔蒙紧密地相互作用。
  • the adrenals produce a large per cent of a man's sex hormones. 肾上腺分泌人体的大部分性激素。
9 tzuzg0     
adj.不自然的,假装的
参考例句:
  • she showed an affected interest in our subject.她假装对我们的课题感到兴趣。
  • his manners are affected.他的态度不自然。
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