Cognitive and brain consequences of conflict
Cognitive and brain consequences of conflict
复制标题
DOI：
10.1006/nimg.2002.1319
复制
发表时间：
2003-01-01
期刊：
影响因子：
5.7
通讯作者：
Posner, MI
中科院分区：
文献类型：
--
作者：
Fan, J;Flombaum, JI;Posner, MI
涉及刺激维度之间冲突的任务已被证明可以激活背侧前扣带回和前额叶区域。有人提出，背侧前扣带回参与了监控冲突的域一般过程，而前额叶区参与了解决冲突。我们研究了三个任务，都需要人们响应的基础上，一个刺激的尺寸，而忽略另一个冲突的尺寸，但不同的冲突的来源。其中一个任务使用语言刺激（Stroop效应），两个任务使用适合儿童和非人类动物的非语言空间冲突。在实验1中，12名参与者在执行三个任务中的每一个任务时进行了事件相关功能磁共振成像（fMRI）研究。三个任务中的每一个的反应曲调显着较长的不一致的条件下相比，一致的条件下，表明每个任务elders的冲突。通过在同一个阶段研究同一个人，我们验证了这样一个假设，即冲突在三个任务中激活了一个相似的大脑网络。在所有三个冲突任务中，前扣带回和左前额叶皮层都有显著的激活。在这些区域内，冲突的组成部分表现出显着的共同激活在三个任务的证据，虽然峰值激活点和空间范围是不相同的。其他区域表现出每项任务特有的激活。实验2-4提供了行为证据，表明任务中涉及的冲突操作之间具有相当大的独立性。行为和功能磁共振成像的结果似乎反对一个单一的统一网络处理冲突，而是支持不同的网络为每个冲突任务或一个单一的网络，监测冲突与不同的网站用于解决冲突。(C)2002 Elsevier Science（美国）。
Tasks involving conflict between stimulus dimensions have been shown to activate dorsal anterior cingulate and prefrontal areas. It has been proposed that the dorsal anterior cingulate is involved a domain general process of monitoring conflict, while prefrontal areas are involved in resolving conflict. We examine three tasks that all require people to respond based on one stimulus dimension while ignoring another con flicting dimension, but which vary in the source of conflict. One of the tasks uses Language stimuli (Stroop effect) and two use nonlanguage spatial conflicts appropriate for children and nonhuman animals In Experiment 1, 12 participants were studied with event-related functional magnetic resonance imaging (fMRI) while performing each of the three tasks. Reaction tunes for each of the three tasks were significantly longer in the incongruent condition compared with the congruent condition, demonstrating that each task elicits a conflict. By studying the same people in the same session, we test the hypothesis that conflict activates a similar brain network in the three tasks. Significant activations were found in the anterior cingulate and left prefrontal cortex for all three conflict tasks. Within these regions, the conflict component demonstrated evidence for significant common activation across the three tasks, although the peak activation point and spatial extent were not identical. Other areas demonstrated activation unique to each task. Experiments 2-4 provide behavioral evidence indicating considerable independence between conflict operations involved in the tasks. The behavioral and fMRI results taken together seem to argue against a single unified network for processing conflict, but instead support either distinct networks for each conflict task or a single network that monitors conflict with different sites used to resolve the conflict. (C) 2002 Elsevier Science (USA).