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The Neural and Computational Basis of Controlled Speed-Accuracy Tradeoff during Task Performance
被引:161
作者:
van Veen, Vincent
[2
]
Krug, Marie K.
Carter, Cameron S.
[1
]
机构:
[1] Univ Calif Davis, Med Ctr, Imaging Res Ctr, Sacramento, CA 95817 USA
[2] Univ Pittsburgh, Pittsburgh, PA 15260 USA
关键词:
D O I:
10.1162/jocn.2008.20146
中图分类号:
Q189 [神经科学];
学科分类号:
071006 ;
摘要:
People are capable, at will, of trading speed for accuracy when performing a task; they can focus on performing accurately at the cost of being slow, or emphasize speed at the cost of decreased accuracy. Here, we used functional magnetic resonance imaging to investigate the neural correlates of this ability. We show increased baseline activity during speed emphasis in a network of areas related to response preparation and execution, including the premotor areas of the frontal lobe, the basal ganglia, the thalamus, and the dorsolateral prefrontal and left parietal cortices. Furthermore, speed emphasis was associated with reduced transient response-related activation in several of these structures, suggesting that because of the greater baseline activity under speed emphasis, less activation is needed in these structures to reach response threshold, consistent with the assumptions of several computational theories. Moreover, we identify the dorsolateral prefrontal cortex as providing the top-down control signal that increases this baseline activity.
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页码:1952 / 1965
页数:14
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