If you want to stay young, sit down and have a good think. This is the research finding of a team of Japanese doctors, who say that most of our brains are not getting enough exercise, and as a result, we are growing old unnecessarily soon.
Professor Taiju Matsuzawa wanted to find out why quite healthy farmers in northern Japan appeared to be losing their ability to think at a rather early age, and how the speed of getting old could be slowed down.
With a team of researchers at Tokyo National University, he set about measuring brain sizes of a thousand people of different ages with different jobs.
The researchers measured the sizes of the front and side parts of the brain, which have something to do with thinking and feeling, and decide the human character. As we all know, the back part of the brain, which controls task like eating and breathing, does not contract(萎缩)with age.
Contraction of front and side parts, as cells(细胞)die off, was seen in some people in their thirties, but it was still not found in some sixty and seventy-year-olds.
Matsuzawa concluded from his tests that there is a simple way to prevent the contraction---using the head.
The findings show that contraction of the brain begins sooner in people in the country than those in the towns. Those with least possibility, says Matsuzawa, are lawyers, followed by university professors and doctors. White-collar workers doing the same work day after day in government offices are, however, as possible to have contracting brains as the farm workers, bus drivers and shop assistants.
60.The team of doctors wanted to find out .
A.how to make people live longer B.the size of certain people’s brains
C.which group of people are the busiest
D.why certain people grow mentally old sooner than others
61.Their research findings are based on .
A.A study of farmers in northern Japan B.Tests given to a thousand old people
C.The study of brain sizes of different people
D.The latest development of computer technology
62.The doctor’s tests show that .
A.our brains contract as we grow older B.one part of the brain does not contract
C.sixty-year-olds have better brains than thirty-year-olds
D.contraction of the brain begins sooner in people in the country
63.According to the passage, seem to grow mentally old slower than the others.
A.Clerks | B.Farmers | C.Lawyers | D.Shop assistants |
64.The most possible conclusion of the article is that .
A.it’s better to live in the towns
B.the brain contracts if it is not used
C.most of us should take more exercise
D.the more one uses his brain, the sooner he becomes old