The neurophysiology of response competition: Motor cortex activation and inhibition following subliminal response priming
The neurophysiology of response competition: Motor cortex activation and inhibition following subliminal response priming
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DOI：
10.1162/0898929053279513
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发表时间：
2005-03-01
影响因子：
3.2
通讯作者：
Seiss, E
中科院分区：
文献类型：
--
作者：
Praamstra, P;Seiss, E
认知神经科学中一些广泛使用的任务依赖于选择选项之间反应冲突的诱发，包括在发出正确反应之前部分激活不正确的反应。尽管此类“冲突任务”通常用于研究基于额叶的冲突监控过程，但尚不清楚运动皮层中的反应竞争如何演变。为了研究反应竞争期间运动皮层激活的动态，我们使用了阈下启动任务来诱导反应竞争，同时绕过反应前阶段的处理冲突。对运动相关脑电图电位的分析支持以相互抑制为特征的竞争反应之间的相互作用。响应通道之间的抑制性相互作用有助于解决响应冲突。然而，运动皮层水平的相互抑制似乎独立于较高水平的冲突监测过程而运作，而较高水平的冲突监测过程对阈下启动引起的反应冲突相对不敏感。这些结果阐明了响应冲突如何引起干扰，以及基于额叶的干扰控制过程的参与条件。
Some widely used tasks in cognitive neuroscience depend oil the induction of a response conflict between choice alternatives, involving partial activation of the incorrect response before the correct response is emitted. Although Such "conflict tasks" are often used to investigate frontal-lobe-based conflict-monitoring processes, it is not known how response competition evolves in the motor cortex. To investigate the dynamics of motor cortex activation during response competition, we used a subliminal priming task that induced response competition while bypassing preresponse stage processing conflict. Analyses of movement-related EEG potentials supported an interaction between competing responses characterized by reciprocal inhibition. Inhibitory interactions between response channels contribute to the resolution of response conflict. However, the reciprocal inhibition at motor cortex level seemed to operate independent of higher level conflict-monitoring processes, which were relatively insensitive to response conflict induced by subliminal priming. These results elucidate how response conflict causes interference as well as the conditions under which Frontal-lobe-based interference control processes are engaged.