Neural implementation of response selection in humans as revealed by localized effects of stimulus-response compatibility on brain activation

被引:76
作者
Schumacher, EH [1 ]
D'Esposito, M
机构
[1] Univ Calif Berkeley, Wills Neurosci Inst, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Dept Psychol, Berkeley, CA 94720 USA
关键词
attention; prefrontal cortex; executive control; neuroimaging; functional magnetic resonance imaging; human performance;
D O I
10.1002/hbm.10063
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Response selection, which involves choosing representations for appropriate motor behaviors given one's current situation, is a fundamental mental process central to a wide variety of human performance, yet the neural mechanisms underlying this mental process remain unclear. Research using nonhuman primates implicates ventral prefrontal and lateral premotor cortices in this process. In contrast, human neuroimaging research also highlights the role of dorsal prefrontal, anterior cingulate, and superior parietal cortices in response selection. This inconsistency may stem from the difficulty of isolating response selection within the constraints of cognitive subtraction methodology utilized in neuroimaging. We overcome this limitation by using an experimental procedure designed to selectively influence discrete mental processing stages and analyses that are less reliant on the assumptions of cognitive subtraction. We varied stimulus contrast to affect stimulus encoding and stimulus-response compatibility to affect response selection. Brain activation data suggest processing specific to response selection in superior parietal and dorsal prefrontal cortices, and not ventral prefrontal cortex. Anterior cingulate and lateral premotor cortices may also be involved in response selection, or these regions may mediate other response processes. (C) 2002 Wiley-Liss, Inc.
引用
收藏
页码:193 / 201
页数:9
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