The interaction of stimulus- and response-related processes measured by event-related lateralizations of the EEG
The interaction of stimulus- and response-related processes measured by event-related lateralizations of the EEG
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DOI：
10.1016/0013-4694(96)95602-3
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发表时间：
1996-08-01
期刊：
影响因子：
--
通讯作者：
Wauschkuhn, B
中科院分区：
文献类型：
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作者：
Wascher, E;Wauschkuhn, B
本研究的重点是运动和刺激相关的脑电图（EEG）的不对称性之间的关系。在七个任务中，相同的双边刺激包含不对称信息，但反应要求不同。发现了三种功能上不同的不对称性：（1）单手运动前运动皮层的不对称性，（2）运动开始后约20 ms开始的后皮层的不对称性，和（3）对侧相关刺激的负性早期增加（刺激开始后200-300 ms），这是最大的颞顶叶网站，但也可见在中央网站。虽然有关的刺激侧，这种不对称性调制的反应要求：它在很大程度上被废除与简单的反应，小与nogo比去刺激，发生两次时，需要一系列的简单和选择的反应。因此，早期颞顶叶不对称很可能反映了感觉和运动相关过程之间的界面。
The present study focused on the relationship between movement- and stimulus-related asymmetries of the electroencephalogram (EEG). In seven tasks the same bilateral stimuli containing asymmetric information were presented but response requirements differed. Three functionally distinct asymmetries were found: (1) an asymmetry over the motor cortex prior to unimanual movements, (2) an asymmetry over the posterior cortex beginning about 20 ms after the start of the movement, and (3) an early increase of negativity contralateral to a relevant stimulus (200-300 ms after stimulus onset) that was maximal at temporo-parietal sites but was also visible at central sites. Although related to stimulus side, this asymmetry was modulated by response requirements: it was largely abolished with simple responses, smaller with nogo than with Go stimuli and occurred twice when a sequence of simple and choice responses was required. Therefore, the early temporo-parietal asymmetry most probably reflects an interface between sensory and movement-related processes.