1. 英语小说: 小说下载 在线小说 读书推荐
  2. 英语短文: 家庭保健 健康生活 幸福情感
  1. 能力: 英语口语 英语听力 职场英语 商务英语 影视英语 少儿英语 行业英语 双语阅读
  2. 考试: 英语四级 英语六级 笔译口译 英语单词 考研英语 课堂英语 英语考试 新概念

英语听力

听力入门英语演讲VOA慢速英语美文听力教程英语新闻名校课程听力节目影视听力英语视频

美国:帕金森氏症临床研究及治疗

kira86 于2009-02-05发布 l 已有人浏览
增大字体 减小字体
Scientists Re-Examine a Treatment for Parkinson’s Disease迅雷专用 VOICE ONE:This is SCIENCE IN THE NEWS, in V
    小E英语欢迎您,请点击播放按钮开始播放……

Scientists Re-Examine a Treatment for Parkinson’s Disease


迅雷专用

VOICE ONE:

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

VOICE TWO:

And, I'm Shirley Griffith. This week, we will tell about what is said to be the largest study yet of a treatment for Parkinson's disease. We will also tell about a study of young Americans and their use of social Web sites on the Internet.

(MUSIC)

VOICE ONE:

Recently, researchers in the United States studied the effectiveness of a treatment called deep brain stimulation. It has been used for years to treat patients with Parkinson's disease. The study found that the physical condition of Parkinson's patients often improves after they receive deep brain stimulation. But brain stimulation was also shown to have more side effects than drug treatments.

Parkinson's is a disease of the central nervous system. The disease affects between five hundred thousand and one million five hundred thousand Americans. Doctors confirm about sixty thousand new Parkinson's cases in the United States each year. The disease affects a small area of cells in the middle of the brain. The cells slowly lose their ability to produce a chemical called dopamine.

The decrease in the amount of dopamine can result in one or more of the general signs of Parkinson's. These include shaking in the hands, arms and legs. They also include muscle tightness and restricted movements. Another symptom is difficulty keeping balanced while standing or walking. Medicine can help patients. Yet it can become less effective as the disease progresses.

VOICE TWO:

Deep brain stimulation uses electricity to shock the brain in areas that help send messages to the body. In Parkinson's patients, these areas of the brain can become blocked. When this happens, the messages give misinformation to the body.

Deep brain stimulation begins by doctors drilling two small holes in the head of the patient. Two thin, electrical wires are then placed in the brain. They are connected under the skin to another wire that leads to a small battery placed in the chest. The device supplies electricity.

Doctors do not know exactly how the brain stimulation works to help patients with Parkinson's. But experts believe the electrical current might help activate nerve cells that are not working correctly.

VOICE ONE:

The study involved two hundred fifty-five Parkinson's patients. It took place at thirteen medical centers across the United States between May of two thousand two and October of two thousand five. The patients kept written records of their physical abilities.

The Journal of the American Medical Association published results of the study. They showed that patients who received deep brain stimulation had better control of their symptoms than those who only took medicine. In fact, the patients who had the treatment reported an average gain of nearly five hours each day of good control of their symptoms. The average gain was zero hours for the other group.

VOICE TWO:

Deep brain stimulation is not the answer for all Parkinson's patients. Doctors say it is best for patients whose medicines cause side effects or are not working. The treatment is not new.  It was first approved for use in the United States in nineteen ninety-seven. However, its effectiveness had never before been compared to that of medicines in a large study.

In the United States, Parkinson's patients can receive deep brain stimulation at about three hundred medical centers. The treatment has been performed about forty thousand times throughout the world.

But several possible side effects make the treatment risky.  The side effects include pain in the head, problems speaking and slowed movement. One patient who had the surgery died. However, in many cases, the researchers found the side effects ended within six months.  And, some patients said the improvements they experienced were worth the risk.

VOICE ONE:

Deep brain stimulation is also costly. It can cost as much as one hundred fifty thousand dollars. In addition, the battery placed under the skin may require a replacement.  This means doctors need to perform another operation.

The company that makes the device, Medtronic, helped to pay for the study.  Financial support also came from the United States Department of Veterans Affairs and the National Institute of Neurological Disorders and Stroke.

In addition to people with Parkinson's, the treatment is also being tested for patients with severe depression, lasting pain and epilepsy.

(MUSIC)

VOICE TWO:

Myspace

Social networking services on the Internet are popular in many countries. These services are web sites that help people find others like themselves and create personal identities. Users also can exchange resources and work together.

MySpace is a popular social networking web site in the United States. Recently, researchers found that more than half of young people who use MySpace often discuss high-risk activities. The activities are said to include drug use, sexual behavior and violence.

Two studies exploring the subject were published last month in the Archives of Pediatric and Adolescent Medicine. The MySpace web site is largely available to the public on the Internet. It provides personal web sites to individuals around the world.

VOICE ONE:

In one study, American researchers examined MySpace pages belonging to five hundred eighteen year-olds from the United States. The researchers say the MySpace pages were chosen by chance. They found that forty-one percent of the pages included information about alcohol or drug use. Twenty-four percent discussed sexual behavior. And, fourteen percent included discussion of violence.

The study showed that males were more likely to discuss violence than females on their MySpace pages. Young people who said they were active in religious groups, sports or had other interests were less likely to discuss risky behaviors.

VOICE TWO:

In the second study, the researchers read MySpace information about one hundred ninety individuals. All of the individuals said they were eighteen to twenty years old. Each person discussed high-risk behavior on the web site.

One of the researchers was Megan Moreno of the University of Wisconsin School of Medicine and Public Health. At the time of the study, she worked at the Seattle Children's Research Institute.

Doctor Moreno sent a message to half the young people.  Her e-mail suggested that they change their MySpace page. She also warned them about the risk of sharing personal information. The message also included links to information about diseases spread by sexual activity.

The study found that about fourteen percent of those receiving the e-mail removed sexual behavior information from their site. Among individuals who did not receive a message, about five percent later removed the information. Those who received the message also were more likely to make their MySpace pages private.

VOICE ONE:

In the United States, the Internet is available to more than ninety percent of young people.  About half of all young people use social connection web sites, including MySpace and Facebook. MySpace has more than two hundred million profiles or personal pages within its web site. Research suggests about twenty-five percent of all the profiles belong to individuals under age eighteen.

Information written on social web sites is not always true.  Still, law enforcement officials have long warned about the dangers of young people being identified by adults wishing to harm them. Parents also worry about the effects that personal information or pictures can have on the child's ability to get jobs or go to college.

Doctor Dimitri Christakis of the Seattle Children's Hospital worked on the study. He suggests that parents educate themselves about the Internet. He suggests they even create their own web pages, and read their children's pages. He says parents have a responsibility to know what their children are including on public web sites.

(MUSIC)

VOICE TWO:

This SCIENCE IN THE NEWS program was written by Brianna Blake, who was also our producer. I'm Shirley Griffith.

VOICE ONE:

And I'm Bob Doughty. We would like to hear from you. Write to us at Special English, Voice of America, Washington, DC, two-zero-two-three-seven, USA. Or send your e-mails to special@voanews.com. Join us again next week for more news about science in Special English on the Voice of America.

 1 2 下一页
分享到
添加到收藏

VOA慢速排行

  1. 1Money Talks 有钱能使鬼推磨 与钱有关的几
  2. 1VOA词汇掌故:It Will Not Wash 行不通;不起作
  3. 1VOA词汇掌故:Circus 与马戏团相关的成语表达
  4. 1VOA词汇掌故:与苹果相关的美国习惯用语
  5. 1VOA健康报道:放风筝能让人感到心情平静和愉
  6. 1VOA词汇掌故:Dime 形容经济形势不好的几个美
  1. 1VOA词汇掌故:Circus 与马戏团相关的成语表达
  2. 1Money Talks 有钱能使鬼推磨 与钱有关的几
  3. 1VOA词汇掌故:All About Names 和人的名字有
  4. 1VOA慢速: 科学家称夏威夷将有大型火山喷发
  5. 1美国专利局商标局发行第1000万份专利
  6. 1VOA慢速:朝美会晤 朝鲜选新加坡作为会面场所
  1. 1智能农场设备可以大大减少化学药品使用
  2. 1与Earth相关的所有地道英语表达
  3. 1VOA慢速:川普签署钢铝关税宣言 加拿大墨西哥
  4. 1VOA词汇掌故:All About Names 和人的名字有
  5. 1VOA慢速:亚马逊CEO贝佐斯成为全球首位千亿富
  6. 1卫冕冠军德国0:2出局!韩国助墨西哥出线

鸿运国际pt客户端

百度360搜索搜狗搜索