• 点赞!5名男子冰河接力救人 2个孩子成功获救 2019-03-22
  • angelababy晒化妆全过程 大方素颜出镜 2019-03-12
  • 回复@老老保老张工:伪高工想回到那种你生产的产品再水都有人买单都不会倒闭的日子?没门儿! 2019-03-02
  • 日本樱岛火山大规模喷发 2019-03-02
  • 马克思主义依然深刻影响人类发展进程(权威论坛) 2019-03-01
  • 百姓故事“触摸山城温情 讲述百姓故事”——华龙网 2019-02-27
  • 人民日报评论员:携手创造更加光明的美好未来 2019-02-27
  • 评论:学位授权自主审核推动高校内涵发展 2019-02-26
  • [微笑]建议你去学学边际理论!基本需求免费与高级需求收费并不矛盾,相反是更有利于保持社会的良性循环。 2019-02-21
  • 德政府强令戴姆勒召回77万辆柴油车 2019-02-10
  • 法中委员会秘书长:法中两国将在创新合作中碰撞出火花 2019-02-10
  • 被控涉“共谍案”遭起诉 新党王炳忠质疑检方罗织罪名 2019-02-07
  • 畅想——未来的人民日报 2019-02-07
  • 新时代推进生态文明建设的重要遵循 2019-01-26
  • 【聚焦军博会】216个代表团2037个项目将亮相军博会 11大军工集团全部参展 2019-01-16

  • 北京赛车pk10基本走势图每天学英语新概念六级音标词汇语法四级研究生大学高中初中小学少儿演讲有声圣经VOA商务雅思

    您所在的位置: 北京赛车pk10基本走势图 > 听力资料 > 在线视听资料 >...> 2009年VOA慢速英语 > VOA慢速9月份 > 正文

    站内搜索:

    小提示:学单词背单词请到大耳朵免费在线背单词系统
    mud/[]/ n.泥, 泥浆, 泥泞, 污物...

    北京赛车pk10质合走势图:VOA慢速 Science in the News_ Alzheimer's Disease_ Into the World's Most Common Form of Dementia (09-9-

    Alzheimer's Disease: Into the World's Most Common Form of Dementia

    By Jerilyn Watson

    2009-9-14

    VOICE ONE:

    This is SCIENCE IN THE NEWS in VOA Special English. I'm Bob Doughty.



    VOICE TWO:

    And I'm Barbara Klein. Today we tell about Alzheimer's disease. More than a century after its discovery, Alzheimer's disease is still destroying people's brains. The cause remains unknown.

    (MUSIC)

    VOICE ONE:

    September twenty-first is World Alzheimer's Day. The theme for the observance this year is "Diagnosing Dementia: See It Sooner." The goal is early identification of the disease so those affected get the treatment they need.

    Around the world, there will be walks to raise money for medical research. Training courses and educational meetings also are planned.

    In the United States, for example, more than twenty thousand teams are preparing for what organizers call memory walks. Singapore will hold public events in at least three languages: English, Malay and Mandarin. And, Barbados will mark World Alzheimer's Day with events like a religious service, a health fair and performances by musicians.

    VOICE TWO:

    An estimated thirty million people around the world have Alzheimer's disease. In the United States alone, more than five million people are said to suffer from this slowly increasing brain disorder.

    Alzheimer's affects memory and personality -- those qualities that make a person an individual. There is no known cure. Victims slowly lose their abilities to deal with everyday life.

    At first, they forget simple things, like where they put something or a person's name. As time passes, they forget more and more. They forget the names of their husbands, wives or children. Then they forget who they are.

    Finally, they remember almost nothing. It is as if their brain dies before the other parts of the body. Victims of Alzheimer's do die from its effects or conditions linked to it. But death may not come for many years.

    (MUSIC)

    VOICE ONE:

    Alzheimer's disease is the most common disability or mental sickness called dementia. Dementia is the loss of thinking ability that is severe enough to interfere with daily activities. It is not a disease itself. Instead, dementia is a group of signs of some conditions and diseases.

    Some kinds of dementia can be cured or corrected. This is especially true if they result from drugs, infection, sight or hearing problems, head injury, and heart or lung problems. Other kinds of dementia can be corrected by changing levels of hormones or vitamins in the body. However, brain cells of Alzheimer's victims die and are not replaced.

    Victims can become angry and violent as the ability to think and remember decreases. They sometimes shout and move with no purpose or goal. Media reports tell about older adults found walking in places far from their homes. They do not know where they are or where they came from. These people often are suffering from Alzheimer's disease.



    VOICE TWO:

    Alzheimer's generally develops differently in each person. Yet some early signs of the disease are common. The victims may not recognize changes in themselves. Others see the changes and struggle to hide them.

    Probably the most common early sign is short-term memory loss. The victim cannot remember something that happened yesterday, for example. Also, victims of the disease have increasing difficulty learning and storing new information. Slowly, thinking becomes much more difficult. The victims cannot understand a joke, or cannot cook a meal, or perform simple work.

    VOICE ONE:

    Another sign of the disease is difficulty solving simple problems. Alzheimer's patients might not know what to do if food on a stove is burning. Also, people have trouble following directions or finding their way to places they have known all their lives.

    Yet another sign is struggling to find the right words to express thoughts or understand what is being discussed. Finally, people with Alzheimer's seem to change. Quiet people may become noisy and aggressive. They may easily become angry and lose their ability to trust others.

    VOICE TWO:

    Alzheimer's disease normally affects people more than sixty-five years old. But rare cases have been discovered in people younger than fifty.

    Alzheimer's is identified in only about two percent of people who are sixty-five. But the risk increases to about twenty percent by age eighty. By eighty five or ninety, half of all people are found to have some signs of the disease.

    Alzheimer's affects people of all races equally. Yet women are more likely to develop the disease than men. This is partly because women generally live longer than men.

    VOICE ONE:

    There is no one, simple test to show if someone has Alzheimer's disease. Social workers and mental health experts sometimes test for memory and judgment. Patients may be asked to identify smells like smoke, natural gas or fruits. Some scientists say a weakened ability to identify smells may be involved. They believe it might show possible development of Alzheimer's.

    Doctors who suspect a patient has Alzheimer's must test the person for many other physical problems first. Alzheimer's is considered if the tests fail to show the existence of other problems. The only way to be sure a person has Alzheimer's is to examine the victim's brain after death.

    (MUSIC)

    VOICE TWO:

    People who care for Alzheimer's patients may become extremely tired physically and emotionally. Families often can get advice and emotional support from local groups. The Alzheimer's Disease Education and Referral Center and the Alzheimer's Association provide information and support.

    Another group, Alzheimer's Disease International, lists ten symptoms of the disease on its Web site. The list shows the difference between these signs of normal aging and the possibility of developing Alzheimer's.



    VOICE ONE:

    Patients cannot fully recover from the disease. But many can be helped by medicine. That is especially true if the disease is found early.

    America's Food and Drug Administration has approved several drugs to treat symptoms of the disease. The drugs are of two kinds. A doctor must order these medicines for patients. Most are called cholinesterase inhibitors.

    VOICE TWO:

    Cholinesterase inhibitors may work by protecting a chemical messenger needed for brain activities. They are meant to treat memory, thinking, language, judgment and other brain activity. They are used for mild to moderate cases of the disease.

    The second kind of drug has a long name. It is represented by the drug memantine. This medicine seems to work by governing the activity of a chemical involved in information processing, storage and memory. It treats patients with moderate to severe Alzheimer's.



    VOICE ONE:

    The British writer Iris Murdoch died of Alzheimer's disease. She said it was a dark and terrible place.

    The two thousand-seven film "Away From Her" tells what happens to one marriage when a partner suffers from the disease. Julie Christie was nominated for the Academy Award for Best Actress for playing the patient. Listen as she describes the pain of her mental condition.

    JULIE CHRISTIE: "Half the time I wander around looking for something I can't remember what it is. Everything is gone."

    VOICE TWO:

    It has been more than a century since a German doctor, Alois Alzheimer, told about a dementia patient whose brain was studied after death. Her brain had sticky structures and nerve cells that appeared to be mixed together.

    Later studies showed these nerves are made of a protein that changes so it sticks together in groups. The sticky structures were shown to be amyloid plaques.

    Scientists are still not sure what causes Alzheimer's disease. The leading theory blames amyloid plaques. Still, a theory exists that amyloid plaques are an effect of the disease, not the cause.

    VOICE ONE:

    Work continues on possible genetic causes. This month, two teams of European researchers said they identified new genetic markers linked to Alzheimer's disease. The teams worked separately. Their findings were reported in the journal Nature Genetics.

    The newly-found genetic markers may affect a person's risk of developing Alzheimer's. Until now, only four genes had been linked with the disease. They provided a better understanding of the disease process, but no immediate treatment.

    Many more studies are being done to find the causes and treatment of Alzheimer's.

    (MUSIC)



    VOICE TWO:

    This SCIENCE IN THE NEWS program was written by Jerilyn Watson. Our producer was Brianna Blake. I'm Barbara Klein.

    VOICE ONE:

    And this is Bob Doughty. Join us again next week for more news about science in Special English on the Voice of America.
    您是否对这篇资料想说点什么?欢迎评论或者纠错,或者提交填空题答案! 您也可以立即
    共有0人向本资料提供了听力原文,其中被采用了0篇,当前有0篇待审批,有0篇未被采用! 查看明细>>
    如果您有更好的听力原文,欢迎提供给大耳朵,如果被采用,您将获得20到100金币的奖励!
    VOA慢速9月份
    高瞻远瞩
    放眼全球
    推荐资源
    最新社区精华帖子更多>>
    • 走遍美国教学版
      走遍美国教学版
    • 哈利学前班[英语儿歌]
      哈利学前班[英语儿歌]
    • 海绵宝宝 英文版
      海绵宝宝 英文版
    • 风中的女王第1季
      风中的女王第1季
    经典学习方法更多>>
    听力资料目录导航
    听力测试 英语词汇 英语口语 考试英语 品牌英语 大学教材 其他教材 商务英语 广播英语 儿童英语
    历年中考听力
    初中中考模拟
    历年高考听力
    高考听力模拟
    历年四级听力
    历年六级听力
    四级听力模拟
    小学  初中
    高中  四级
    六级  考研
    托福  GRE
    星火记忆单词
    用Mp3背单词
    刘毅词汇记忆
    情景英语口语
    4+1听力口语
    出国实用会话
    英语口语8000句
    新东方900句
    美语听力与发音
    ABC到流利口语
    口译考试
    剑桥考试
    中高考考试
    大学四六级考试
    研究生考试
    公共英语考试
    英语专业考试
    新概念 六人行
    赖世雄 许国璋
    走遍美国 越狱
    疯狂英语 沛沛
    语法讲座 动感
    大山英语 探索
    千万别学英语
    大学英语听力
    大学英语精读
    全新版 21世纪
    新视野 实用综
    大学体验 新编
    成人自考 step
    Listen this way
    广州版小学英语
    广州版初中英语
    剑桥少儿英语
    朗文3L看听学
    Goforit新目标
    高中英语课本
    进阶听说教程
    商务英语300句
    VOA商务英语
    商业英语视频
    中级商务英语
    初级剑桥证书
    新编剑桥英语
    剑桥英语精华版
    2007年VOA慢速
    VOA中级美语
    美国习惯用语
    VOA流行美语
    澳广播英语讲座
    在线大学课堂
    VOA视频节目
    宝宝ABC
    棒棒英语
    哈哈美语
    LittleFox儿歌
    英语儿童故事
    380英语小故事
    1035个英语单词
    ?
    免责声明:本站只提供资源播放平台,如果站内部分资源侵犯您的权益,请您告知,我们会立即处理。
    Copyright © 2010-2017 大耳朵英语  京ICP备10010568号 | 京公网安备 11010802020324号

    微信扫一扫手机学英语 关闭
    微博扫一扫手机学英语 关闭
    北京赛车pk10基本走势图关闭
  • 点赞!5名男子冰河接力救人 2个孩子成功获救 2019-03-22
  • angelababy晒化妆全过程 大方素颜出镜 2019-03-12
  • 回复@老老保老张工:伪高工想回到那种你生产的产品再水都有人买单都不会倒闭的日子?没门儿! 2019-03-02
  • 日本樱岛火山大规模喷发 2019-03-02
  • 马克思主义依然深刻影响人类发展进程(权威论坛) 2019-03-01
  • 百姓故事“触摸山城温情 讲述百姓故事”——华龙网 2019-02-27
  • 人民日报评论员:携手创造更加光明的美好未来 2019-02-27
  • 评论:学位授权自主审核推动高校内涵发展 2019-02-26
  • [微笑]建议你去学学边际理论!基本需求免费与高级需求收费并不矛盾,相反是更有利于保持社会的良性循环。 2019-02-21
  • 德政府强令戴姆勒召回77万辆柴油车 2019-02-10
  • 法中委员会秘书长:法中两国将在创新合作中碰撞出火花 2019-02-10
  • 被控涉“共谍案”遭起诉 新党王炳忠质疑检方罗织罪名 2019-02-07
  • 畅想——未来的人民日报 2019-02-07
  • 新时代推进生态文明建设的重要遵循 2019-01-26
  • 【聚焦军博会】216个代表团2037个项目将亮相军博会 11大军工集团全部参展 2019-01-16
  • 0.304905s