It’s not a particular brain region that makes someone smart or not smart. Nor is it the strength and speed of the connections throughout the brain or such features as total brain volume. Instead, new research shows, it’s the connections between very specific areas of the brain that determine intelligence.

“General intelligence actually relies on a specific network inside the brain, and this is the connections between the gray matter, or cell bodies, and the white matter, or connecting fibers between neurons(神經(jīng)元)，”said Jan Glascher, lead author of a paper appearing in this week’s issue of the Proceedings of the National Academy of Sciences.

The results weren’t entirely unexpected, said Keith Young, vice chairman at Texas A﹠M Health Science Center College of Medicine in Temple, but “it proves that good communication between various parts of brain are very important for this general intelligence.”

“People noticed a long time ago that, in general, people who are good test-takers did well in a lot of different subjects,”explained Young. “If you’re good in mathematics, you’re also usually good in English. Researchers came up with this idea that this represented a kind of overall intelligence.”

Hoping to learn more, some experts located 241 patients who had some sort of their lesions (損害). They then diagrammed the location of their lesions and had them take IQ testes. “We took patients who had parts of their brain damaged, tested them on intelligence to see where they were good and where they were bad, then we connected those scores across all the patients with the location of the brain lesions,”Glascher explained. “That way, you can know the areas that are associated with reduced performance on these tests, which means these areas are really important for general intelligence.”

“These studies suggest results based on the absence of brain tissue (組織),”added Paul Sanberg, famous professor and director of the University of South Florida Center. “It allows them to systemize and find areas important to intellingence.”

1. Which of the following is the best title for the passage?

A. General Intelligence Depend on Brain Volume

B. Scientists Explain Mysteries of Intelligence

C. Science Research Done on Human Brain

D. Brain Lesions Cause Patients Stupid

2.According to Keith Young, we can infer that_____________.

A. the parts of brain are working smooth on their own

B. a person good at maths has obstacles learning languages

C. overall intelligence will make a person successful

D. Jan Glascher’s article really shocks the world

3. Why did experts locate 241 patients with some sort of brain lesions?

A. To diagram the location of their lesions.

B. To take IQ tests to the patients.

C. To know more about the secrets of intelligence.

D. To take better care of the patients.

4.From the diagram, the experts concluded that_____________.

A. the absence of brain tissue will influence intelligence

B. the brain lesions can improve the performance

C. patients with brain lesions will get a high score

D. Some areas totally determine the ability of intelligence

 

【答案】

 B

 C

 C

 A

【解析】略

 

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