Passage 37
In the 1920s, Gerstmann described a set of problems found in people who have suffered damage to the brain’s left parietal lobe, problems that include being unable to understand arithmetic and having difficulty identifying one’s fingers. There is still no agreement on whether the symptoms Gerstmann noticed constitute a syndrome, but the parts of the brain used for storing facts about numbers and for representing the fingers are close to each other. Mental representations of numbers and of fingers may therefore be functionally connected. A 2005 experiment had people perform some tasks requiring dexterity and others involving matching pairs of numbers, while an area of their parietal lobes—the left angular gyrus—was stimulated by a magnetic field. Facility at both sets of tasks was impaired.
1. The author of the passage would most likely agree that the highlighted statement suggests
A. a flaw in the experiment conducted in 2005
B. a means by which dexterity might compensate for a loss of arithmetic ability
C. an explanation for some of Gerstmann’s observations
D. an anomaly in some of Gerstmann’s results
E. a reason to doubt damage to the left parietal lobe as a causal factor in certain symptoms
2. The author of the passage describes the “2005 experiment” and its results primarily in order to
A. establish the proximity between the part of the brain used for storing numerical information and the part used for representing the fingers
B. illustrate the implications that Gerstmann’s work may have for experimental research
C. cast doubt on the idea that damage to the left parietal lobe causes the set of problems that Gerstmann described
D. support a hypothesis about a significant association between parts of the brain related to fingers and to numbers
E. suggest that the problems Gerstmann noted in relation to numbers and fingers have a different cause than the other problems associated with parietal lobe damage
答案:C D
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