Differentiating allocation of resources and conflict detection within attentional control processing
Differentiating allocation of resources and conflict detection within attentional control processing
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DOI：
10.1111/j.1460-9568.2007.05283.x
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发表时间：
2007-01-01
影响因子：
3.4
通讯作者：
Mattay, Venkata S.
中科院分区：
文献类型：
--
作者：
Blasi, Giuseppe;Goldberg, Terry E.;Mattay, Venkata S.
对冲突检测和注意力资源分配的需求不断增加，这就增加了对注意力控制的需求。虽然先前的证据表明，不同的皮层区域优先从事这两个注意力过程，冲突检测和/或分配的注意力资源的需求增加的影响一直相对未被探索。我们设计了一个新的任务（“可变注意力控制”-VAC任务），通过增加冲突检测和分配的注意力资源在相同的刺激不同的注意力控制的需求。我们研究了34名在执行VAC任务时接受事件相关功能磁共振成像的受试者。对注意力控制的需求增加，反映在反应时间延长和准确性降低，与背外侧前额叶皮层，顶叶皮层和背扣带回的更大激活有关。此外，增加冲突检测与更大的背扣带回活动，而增加的需求分配的注意力资源意味着更大的激活背外侧前额叶和顶叶皮层。从本质上讲，除了允许探索对注意力控制需求增加的整体影响外，我们的新任务还允许将注意力控制的神经成分解析为与注意力资源分配相关的神经成分和与冲突检测相关的神经成分。
Increasing demands for conflict detection and for allocation of attentional resources increase the need for attentional control. While prior evidence suggests that different cortical regions are preferentially engaged by these two attentional processes, the effect of increasing demand for conflict detection and/or allocation of attentional resources has been relatively unexplored. We designed a novel task (the 'variable attentional control'-VAC-task) that varies the demand for attentional control by increasing conflict detection and allocation of attentional resources within the same stimuli. We studied 34 subjects who underwent event-related functional magnetic resonance imaging while performing the VAC task. Increasing demand for attentional control, as reflected by longer reaction time and reduced accuracy, was associated with greater activation in the dorsolateral prefrontal cortex, parietal cortex and dorsal cingulate. Furthermore, an increase in conflict detection was associated with greater dorsal cingulate activity, whereas an increase in demand for allocation of attentional resources implied greater activation in the dorsolateral prefrontal and parietal cortices. In essence, in addition to allowing the exploration of the overall effects of increasing demand for attentional control, our novel task also allowed parsing of the neural components of attentional control into those related to allocation of attentional resources and those related to conflict detection.