With a team of researchers at Tokyo National University, he set about measuring brains volumes of a thousand people of different ages with different jobs.
Computer technology helped the researchers to get most exact measurements of the volume 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 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.39. The team of doctors wanted to find out_______.
A. how to make people live longer
B. how to slow down the speed of getting old
C. the size of certain people’s brains
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