It is common today to identify, in some way, with one side of the brain. You may think, for example, that you are more "right br

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问题     It is common today to identify, in some way, with one side of the brain. You may think, for example, that you are more "right brain" than "left". When we make such statements, we are referring to the fact that the two halves of the human brain deal with information from the senses, and hence the world, in different ways. In general, the left hemisphere is responsible for our processing of language and logic and the right deals with aspects of thought like emotions and spatial relationships. The hemispheres also control our movements, though the left hemisphere controls the right side of our bodies, and vice versa.
    The fact that the two hemispheres of the brain work in different ways on different tasks is a relatively new discovery. That discovery was made by a psychobiologist named Roger Sperry and it won him a Nobel Prize in 1981. Sperry uncovered the inner workings of normal brains by studying the brain function of people who had a certain kind of brain damage. In most brains, the two halves are connected by the corpus callosum, a bundle of millions of nerves, which serves as a "bridge" of sorts between the two hemispheres, allowing them to communicate with each other. The people Sperry studied had had their corpus callosa cut, and because of this, their left and right brains couldn’t exchange information. In a famous experiment, Sperry showed one such subject two pictures. The subject saw a picture of a knife with his right eye(controlled by the left brain)and a picture of a spoon with his left eye(controlled by the right brain). When asked to name what he saw, the subject said knife, because it is the left brain that deals with language and the naming of things. However, when asked to reach over with his left hand to a nearby table on which was placed both a knife and a spoon, and choose, without looking, the object he saw, the subject chose the spoon. This is because his left eye(controlled by the right brain)saw the spoon and his left hand(also controlled by the right brain)chose this rather than the knife. The subject himself was not at all conscious of the fact that he was seeing and choosing two different objects.
The corpus callosum______.

选项 A、is only found in abnormal human brains
B、is found between the two hemispheres
C、is part of the left hemisphere
D、is where memory is stored

答案B

解析 从第二段第四句提供的信息可以很容易得知corpus callosum“胼胝体”位于两个脑半球之间,并起着连接二者的桥梁作用。
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