Separate conflict-specific cognitive control mechanisms in the human brain
Separate conflict-specific cognitive control mechanisms in the human brain
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DOI：
10.1016/j.neuroimage.2006.11.061
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发表时间：
2007-04-01
期刊：
影响因子：
5.7
通讯作者：
Hirsch, Joy
中科院分区：
文献类型：
--
作者：
Egner, Tobias;Delano, Margaret;Hirsch, Joy
为了确保最佳的任务表现，人脑通过认知控制系统检测并解决信息处理中的冲突。然而，尚不清楚冲突解决是否依赖于认知控制的单一中央资源，还是依赖于处理不同类型冲突的独立控制机制的集合。为了。为了解决这个问题，我们在修改后的颜色命名斯特鲁普任务中同时检测和解决两个冲突源期间评估了行为和血氧水平依赖性（BOLD）反应：由于任务相关和不相关的刺激特征（基于刺激或斯特鲁普冲突）之间的不兼容而产生的冲突，以及由于不相关的刺激特征和响应特征（基于响应或基于响应的响应）之间的不兼容而产生的冲突。 西蒙冲突）。结果表明，基于刺激的冲突所招募的控制机制解决了基于刺激的冲突，但不影响基于响应的冲突的解决，反之亦然。基于反应的冲突的解决通过前运动皮层的活动调节来区分，而基于刺激的冲突的解决通过顶叶皮层的活动调节来区分。这些结果表明，人脑灵活地采用并独立控制特定于冲突的解决策略，偏向运动编程以解决基于响应的冲突，并偏向刺激表征以解决基于刺激的冲突。我们提出了一种非集中式、模块化的认知控制架构，其中单独的控制资源并行运行，并以上下文敏感的方式进行招募。 (c) 2006 Elsevier Inc. 保留所有权利。
To ensure optimal task performance, the human brain detects and resolves conflict in information processing via a cognitive control system. However, it is not known whether conflict resolution relies on a single central resource of cognitive control, or on a collection of independent control mechanisms that deal with different types of conflict. In order to. p address this question, we assessed behavioral and blood-oxygen-level-dependent (BOLD) responses during the simultaneous detection and resolution of two sources of conflict in a modified color-naming Stroop task: conflict stemming from incompatibility between the task-relevant and an irrelevant stimulus feature (stimulus-based or Stroop conflict), and conflict stemming from incompatibility between an irrelevant stimulus feature and response features (response-based or Simon conflict). Results show that control mechanisms recruited by stimulus-based conflict resolve stimulus-based conflict, but do not affect the resolution of response-based conflict, and vice versa. The resolution of response-based conflict was distinguished by modulation of activity in premotor cortex, whereas resolution of stimulus-based conflict was distinguished by the modulation of activity in parietal cortex. These results suggest that the human brain flexibly adopts, and independently controls, conflict-specific resolution strategies, biasing motor programming to resolve response-based conflict, and biasing stimulus representations to resolve stimulus-based conflict. We propose a non-centralized, modular architecture of cognitive control, where separate control resources operate in parallel, and are recruited in a context-sensitive manner. (c) 2006 Elsevier Inc. All rights reserved.