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添加时间:2019-01-10 10:17:22 浏览次数: 作者:未知
  • A study published on Wednesday in the journal Neurology showed stressed-out middle-aged1 people were more likely to show symptoms of memory loss. The study revealed that middle-aged people with high levels of a hormone2 called cortisol in their blood have apparently3 impaired4 memory when compared to those with average levels of the hormone.


    Cortisol, produced by the adrenal glands5, helps the body respond to stress and it can also help reduce inflammation, control blood sugar and blood pressure. High cortisol levels can be caused by stress, medical conditions or medications.


    "Cortisol affects many different functions so it is important to fully investigate how high levels of the hormone may affect the brain," said the study's author Justin B. Echouffo-Tcheugui with Harvard Medical School.

    "皮质醇影响许多不同的功能,所以对皮质醇的水平会如何影响大脑进行充分研究是非常重要的,"来自哈佛医学院的研究作者Justin B. Echouffo-Tcheugui说道。

    The researchers identified 2,231 people with an average age of 49 who were free of dementia. At the beginning of the study, each participant had a psychological exam and assessments6 for memory and thinking skills. Their memory and thinking skills were tested again an average of eight years later.


    Participants also provided a blood sample, taken in the morning after a period of fasting. Researchers measured cortisol levels in the blood and then divided participants into low, middle and high groups. A total of 2,018 participants also had an MRI brain scan to measure brain volume, according to the study.


    After adjusting for age, sex, smoking, and body mass index, researchers found that people with high levels of cortisol had lower scores on tests of memory and thinking skills than those with normal levels of cortisol.


    But no links were found between low cortisol levels and memory or brain size.


    "Our research detected memory loss and brain shrinkage in middle-aged people before symptoms started to show, so it's important for people to find ways to reduce stress, such as getting enough sleep, engaging in moderate exercise, incorporating relaxation7 techniques into their daily lives, or asking their doctor about their cortisol levels and taking a cortisol-reducing medication if needed," said Echouffo-Tcheugui.


     9级    双语 


    1 middle-aged ['mɪdl eɪdʒd] UopzSS   第8级
    • I noticed two middle-aged passengers. 我注意到两个中年乘客。
    • The new skin balm was welcome by middle-aged women. 这种新护肤香膏受到了中年妇女的欢迎。
    2 hormone [ˈhɔ:məʊn] uyky3   第8级
    • Hormone implants are used as growth boosters. 激素植入物被用作生长辅助剂。
    • 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。
    3 apparently [əˈpærəntli] tMmyQ   第7级
    • An apparently blind alley leads suddenly into an open space. 山穷水尽,豁然开朗。
    • He was apparently much surprised at the news. 他对那个消息显然感到十分惊异。
    4 impaired [ɪm'peəd] sqtzdr   第7级
    adj.受损的;出毛病的;有(身体或智力)缺陷的v.损害,削弱( impair的过去式和过去分词 )
    • Much reading has impaired his vision. 大量读书损害了他的视力。 来自《现代汉英综合大词典》
    • His hearing is somewhat impaired. 他的听觉已受到一定程度的损害。 来自《现代汉英综合大词典》
    5 glands [glændz] 82573e247a54d4ca7619fbc1a5141d80   第8级
    n.腺( gland的名词复数 )
    • a snake's poison glands 蛇的毒腺
    • the sebaceous glands in the skin 皮脂腺
    6 assessments [əˈsesmənts] 7d0657785d6e5832f8576c61c78262ef   第7级
    n.评估( assessment的名词复数 );评价;(应偿付金额的)估定;(为征税对财产所作的)估价
    • He was shrewd in his personal assessments. 他总能对人作出精明的评价。 来自《简明英汉词典》
    • Surveys show about two-thirds use such assessments, while half employ personality tests. 调查表明,约有三分之二的公司采用了这种测评;而一半的公司则采用工作人员个人品质测试。 来自百科语句
    7 relaxation [ˌri:lækˈseɪʃn] MVmxj   第7级
    • The minister has consistently opposed any relaxation in the law. 部长一向反对法律上的任何放宽。
    • She listens to classical music for relaxation. 她听古典音乐放松。

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