Automaticity and reestablishment of executive control -: An fMRI study
Automaticity and reestablishment of executive control -: An fMRI study
复制标题
DOI：
10.1162/jocn.2006.18.8.1331
复制
发表时间：
2006-08-01
影响因子：
3.2
通讯作者：
Garavan, Hugh
中科院分区：
文献类型：
--
作者：
Kuebler, Andrea;Dixon, Veronica;Garavan, Hugh
对自动行为施加控制的能力特别重要，因为它允许我们在自动反应不再足够甚至危险时中断我们的行为。然而，尽管存在关于练习对大脑激活的影响的文献，但对重建对先前自动化行为的执行控制所涉及的神经解剖学知之甚少。我们提出了一个视觉搜索任务，使参与者自动化，根据定义的标准在约3小时的实践，然后要求他们重申控制，而不改变刺激集。我们发现在早期的实践中广泛的皮层激活。所有额叶区域和顶下小叶的激活随着练习而显著降低。当需要执行控制时，只有特定的前额叶（布罗德曼区[BA] 9/46/8）和顶叶区（BA 39/40）被特别激活，强调背外侧前额叶皮层在执行控制中的关键作用，以指导我们的行为。
The ability to exert control over automatic behavior is of particular importance as it allows us to interrupt our behavior when the automatic response is no longer adequate or even dangerous. However, despite the literature that exists on the effects of practice on brain activation, little is known about the neuroanatomy involved in reestablishing executive control over previously automatized behavior. We present a visual search task that enabled participants to automatize according to defined criteria within about 3 hr of practice and then required them to reassert control without changing the stimulus set. We found widespread cortical activation early in practice. Activation in all frontal areas and in the inferior parietal lobule decreased significantly with practice. Only selected prefrontal (Brodmann's areas [BAs] 9/46/8) and parietal areas (BAs 39/40) were specifically reactivated when executive control was required, underlining the crucial role of the dorsolateral prefrontal cortex in executive control to guide our behavior.