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【61】 Scientists at Johns Hopkins have discovered "striking" differences between men and women in a part of the brain linked with
【61】 Scientists at Johns Hopkins have discovered "striking" differences between men and women in a part of the brain linked with
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2010-06-30
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问题
【61】
Scientists at Johns Hopkins have discovered "striking" differences between men and women in a part of the brain linked with ability to estimate time, judge speed, visualize things three-dimensionally and solve mathematical problems.
【62】
The differences, the researchers say, may underlie well-known trends that vary by sex, such as the fact that more men than women are architects, mathematicians and race-car drivers.
In a study reported this week in the journal Cerebral(大脑的) Cortex(皮层), the researchers show that a brain region called the inferior parietal lobe (IPL,即下顶叶) is significantly larger overall in men than in women. The area is part of the cerebral cortex and appears on both sides of the brain just above ear level.
Also, there is a symmetry difference, with men shavings a larger left IPL than right. 【63】
In women in the study, it is the right IPL that is somewhat larger, though the difference between the two sides of the brain is less obvious than in men, says Psychiatrist Godfrey Pearlson, M. D. , who headed the project.
Researchers also compared IPL volumes on the left and the fight sides of the brain. After allowances for men’s larger overall head and brain size, men had roughly 6 percent more IPL tissue than women.
"The inferior parietal lobe is far more developed in people than in animals and has evolved relatively recently," says Pearlson. 【64】
It allows the brain to process information from senses such as vision and touch, and enables the sort of thinking involved in selective attention and perception.
Studies link the right IPL with a working memory of spatial relationships, the ability to sense relationships between body parts and awareness of a person’s own effects or feelings. The left IPL, Pearlson says, is more involved in perception, such as judging how fast something is moving, estimating time and shaving the ability to mentally rotate 3-D figures.
"To say this means men are automatically better at some things than women is a simplification," says Pearlson. "It’s easy to find women who are fantastic at math and physics and men who excel in language skills. Only when we look at very large populations and look for slight but significant trends do we see the generalizations. 【65】
There are plenty of exceptions, but there’s also a grain of truth, revealed through the brain structure that we think underlies some of the ways people characterize the sexes."
【63】
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答案
领导这项研究的精神病学家、医学博士戈弗雷·皮尔逊说,研究表明,女性的右下顶叶略大一些,尽管女性大脑两边的这种差异没有男性的那么明显。
解析
这是一个含有强调句式的主从复合句。句架是“is the right IPL that is some what larger。句中 though引导了一个状语从句,而says Psychiatrist Godfrey Pearlson,M.D.是插入语部分,其后的who引导了一个非限制性定语从句,修饰Codfrey Pearlson。
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