Brain activation and pupil response during covert performance of the Stroop Color Word task
Brain activation and pupil response during covert performance of the Stroop Color Word task
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DOI：
10.1017/s1355617799544020
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发表时间：
1999-05-01
影响因子：
2.6
通讯作者：
Buxton, RB
中科院分区：
文献类型：
--
作者：
Brown, GG;Kindermann, SS;Buxton, RB
利用血氧水平依赖（BOLD）功能性磁共振成像（fMRI）技术，对年轻健康的成年志愿者在隐蔽执行斯特鲁普颜色 - 文字任务时的大脑激活模式进行了研究。将不一致的斯特鲁普条件与颜色命名和单词阅读两种基线条件进行了比较。在不一致的斯特鲁普条件下，左右前扣带回、右侧楔前叶和左侧岛盖部显示出比基线条件下更大的BOLD信号反应。这些区域的BOLD信号激活具有高度可重复性。在第二个实验中，通过测量7名个体在斯特鲁普任务和颜色命名任务的公开和隐蔽执行过程中的瞳孔直径来评估认知负荷。公开和隐蔽反应条件下的认知负荷相似。BOLD研究结果表明，参与选择性视觉注意以及参与言语的运动程序选择的大脑区域在斯特鲁普任务中的激活程度高于基线任务。解决斯特鲁普颜色 - 文字任务所引发的感知和运动冲突所涉及的神经基质似乎不是单个大脑区域。相反，涉及一个大脑区域网络，该系统内的不同区域支持不同的功能。
Patterns of brain activation associated with covert performance of the Stroop Color-Word task were studied in young, healthy, adult volunteers using blood oxygen level dependent (BOLD) functional magnetic resonance imaging (fMRI). Comparisons of the incongruous Stroop condition were made with both color naming and word reading baselines. Areas of the left and right anterior cingulate, the right precuneus, and the left pars opercularis displayed larger BOLD signal responses during the incongruous Stroop condition than during baseline conditions. Activation of BOLD signals in these areas was highly repeatable. In a second experiment,pupil diameter was used to assess cognitive load in 7 individuals studied during overt and covert performance of both Stroop and color naming conditions. Cognitive load was similar in overt and covert response conditions. Results from the BOLD study indicate that brain regions participating in selective visual attention and in the selection of motor programs involved in speech were activated more by the Stroop task than by the baseline tasks. The neural substrate involved in the resolution of the perceptual and motor conflicts elicited by the Stroop Color-Word task does not appear to be a single brain region. Rather, a network of brain regions is implicated, with separate regions within this system supporting distinct functions.