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阅读了松。 Since the 1970s, scientists have been searchi

时间:2018-11-03 10:21 人气: °  
阅读了松。 Since the 1970s, scientists have been searching for ways to link the brain with computers. Brain-computer interface (BCI) could help people with disabilities send commands to machines. Recently, two researchers, Jose Milan a

  阅读了松。

  Since the 1970s, scientists have been searching for ways to link the brain with computers. Brain-computer

  interface (BCI) could help people with disabilities send commands to machines.

  Recently, two researchers, Jose Milan and Michele Tavella from the Federal Polytechnic school in Lausanne,

  Switzerland, demonstrated (展即兴) a small robotic wheelchair directed by a person's thoughts.

  In the laboratory, Tavella operated the wheelchair just by thinking about moving his left or right band. He

  could even talk as he watched the vehicle and guided it with his thoughts.

  "Our brain has billions of nerve cells. These send signals through the spinal cord (脊髓) to the muscles to

  give us the ability to move. But spinal cord injuries or other conditions can prevent these weak electrical signals

  from reaching the muscles," Tavella says. "Our system allows disabled people to communicate with external

  world and also to control devices."

  The researchers designed a special cap for the user. This head cover picks up the signals from the scalp (头

  皮) and sends them to a computer. The computer interprets the signals and commands the motorized

  wheelchair. The wheelchair also has two cameras that identify objects in its path. They help the computer react

  to commands from the brain.

  Prof. Milan, the team leader, says scientists keep improving the computer software that interprets brain

  signals and turns them into simple commands. "The practical possibilities that BCI offers to disabled

  people can be grouped in two categories: communication, and controlling devices. One example is this

  wheelchair."

  He says his team has set two goals. One is testing with real patients, so as to prove that this is a

  they can benefit from. And the other is to guarantee that they can use the over long periods of time.

  1. BCI is a that can _____.

  A. help to update computer systems

  B. link the human brain with computers

  C. help the disabled to recover

  D. control a person's thoughts

  2. How did Tavella operate the wheelchair in the laboratory?

  A. By controlling his muscles.

  B. By talking to the machine.

  C. By moving his hand.

  D. By using his mind.

  3. Which of the following shows the path of the signals described in Paragraph 5?

  A. scalp→computer→cap→wheelchair

  B. computer→cap→scalp→wheelchair

  C. scalp→cap→computer→wheelchair

  D. cap→computer→scalp→wheelchair

  4. The team will test with real patients to _____.

  A. make profits from them

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