Manual response preparation disrupts spatial attention: An electrophysiological investigation of links between action and attention
Manual response preparation disrupts spatial attention: An electrophysiological investigation of links between action and attention
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DOI：
10.1016/j.neuropsychologia.2009.11.017
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发表时间：
2010-03-01
期刊：
影响因子：
2.6
通讯作者：
Eimer, Martin
中科院分区：
文献类型：
--
作者：
Gherri, Elena;Eimer, Martin
先前的行为和神经科学研究表明，参与控制注意力和行动的系统在功能上和解剖学上是相互联系的。我们使用行为和事件相关的脑电位措施，以调查这种联系是强制性的还是仅仅是可选的。在每次试验开始时呈现的提示指示参与者将注意力转移到左侧或右侧，并同时准备用左手或右手移动手指。在不同的试验中，线索之后是中央围棋信号，需要执行准备好的手动响应（运动任务），或由外围视觉刺激，这需要一个目标-非目标歧视时，只有在提示侧（注意力任务）。当注意力和动作指向同一侧（同侧条件）时，发现表明内隐注意力转移的偏侧化ERP成分，但当注意力和动作指向相反侧（相反侧条件）时，发现不存在。同样，空间注意对周边视觉刺激加工的影响仅在注意和动作指向同侧时才存在，而在对侧条件下则不存在。这些结果表明，在一侧准备手动响应严重扰乱了对另一侧视觉刺激的注意力选择，并表明不可能同时将注意力和动作引导到空间中的不同位置。他们支持这样的假设，即空间注意力和行动的控制是由共享的大脑回路实现的，因此以强制的方式联系在一起。(C)2009爱思唯尔有限公司保留所有权利。
Previous behavioural and neuroscience studies have shown that the systems involved in the control of attention and action are functionally and anatomically linked. We used behavioural and event-related brain potential measures to investigate whether such links are mandatory or merely optional. Cues presented at the start of each trial instructed participants to shift attention to the left or right side and to simultaneously prepare to a finger movement with their left or right hand. In different trials, cues were followed by a central Go signal, requiring execution of the prepared manual response (motor task), or by a peripheral visual stimulus, which required a target-non-target discrimination only when presented on the cued side (attention task). Lateralised ERP components indicative of covert attention shifts were found when attention and action were directed to the same side (same side condition), but not when attention and action were directed to opposite sides (opposite sides condition). Likewise, effects of spatial attention on the processing of peripheral visual stimuli were present only when attention and action were directed to the same side, but not in the opposite sides condition. These results demonstrate that preparing a manual response on one side severely disrupts the attentional selection of visual stimuli on the other side, and suggest that it is not possible to simultaneously direct attention and action to different locations in space. They support the hypothesis that the control of spatial attention and action are implemented by shared brain circuits, and are therefore linked in a mandatory fashion. (C) 2009 Elsevier Ltd. All rights reserved.