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[originaltext] In some children who go blind, certain parts of the brain tha
[originaltext] In some children who go blind, certain parts of the brain tha
游客
2024-05-14
52
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问题
In some children who go blind, certain parts of the brain that normally control vision appear to switch jobs and focus instead on sound, a new study has found.
The study, by researchers at the University of Montreal, involved 7 adults who could see and 12 adults who had lost their vision when they were children. Each participant sat in a room with 16 loudspeakers at different locations. The room was designed so that there were no echoes. During the experiment, the speakers irregularly produced sounds. Participants had to point to where the sounds were coming from. Meanwhile, the researchers monitored blood flow in the brains of the participants to see which brain structures were working during the task.
The results showed that 5 of the blind participants were very good at pointing to where sounds were coming from. In these people, blood flow increased in the visual cortex — an area at the back of the right side of the brain. This part of the brain is usually associated with vision. The other 7 blind participants showed no increase in activity in the visual cortex. These people didn’t do very well at picking out where sounds were coming from. Now, the researchers are looking at whether these people have gained an enhanced sense of touch instead of sound to replace their lost vision. The scientists say that their study shows how adaptable parts of the brain can be.
Questions 32 to 35 are based on the passage you have just heard.
32. What is the purpose of the experiment described in the passage?
33. What were the participants of the experiment asked to do?
34. During the experiment, why was blood flow in the brains of the participants measured?
35. What can best summarize the main idea of the passage?
选项
A、Most blind people have a well-developed sense of touch.
B、People go blind because of the breakdown of their visual cortex.
C、Most blind people have a better sense of sound than normal people.
D、Human brains can adjust themselves after the loss of a certain function.
答案
D
解析
选项均为综合性强的句子表明,本题可能考查短文主旨。短文通过介绍盲人的大脑中负责视力的区域改为负责声音这一实验过程得出结论:how adaptable parts of the brain can be(人类的大脑具有多么强的自我调节能力),[D]表述与此一致,故为答案。
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