Contextual movement constraints of others modulate motor preparation in the observer
Contextual movement constraints of others modulate motor preparation in the observer
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DOI：
10.1016/j.neuropsychologia.2008.07.008
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发表时间：
2009-01-01
期刊：
影响因子：
2.6
通讯作者：
Brass, Marcel
中科院分区：
文献类型：
--
作者：
Liepelt, Roman;Ullsperger, Markus;Brass, Marcel
先前的研究表明，观察一个动作似乎会自动激活观察者相应的运动表征。有人认为，观察到的执行动作的这种直接匹配是受上下文因素调节的。一个悬而未决的问题是，观察另一个人受到身体约束是否会对观察者的行动执行产生影响。通过性能测量，我们发现当感知到他人的手受到物理限制时，反应时间会变慢（实验 1）。当参与者用脚做出反应时，我们没有发现减缓效应，排除了对当前发现的一般感知解释（实验 2）。为了进一步检验我们的假设，我们测量了事件相关的大脑电位（ERP）。 ERP 结果表明，观察到的减慢效应反映在运动相关 ERP 成分的减少（实验 3）。感知到他人的手受到身体限制会损害观察者的运动准备。我们的研究结果表明，观察到的环境限制会自动映射到观察者的运动系统上。这种运动限制的映射可能有助于理解动作。 (C) 2008 Elsevier Ltd. 保留所有权利。
Previous research demonstrated that observing an action seems to automatically activate a corresponding motor representation in the observer. It has been argued that this direct matching of observed on executed actions is modulated by contextual factors. An open question is whether observing another person being physically restrained has an influence on action execution in the observer. Using performance measures we found a slowing of response times when perceiving others' hands being physically restrained (Experiment 1). We did not find a slowing effect when participants responded with their feet ruling out a general perceptual interpretation of the present findings (Experiment 2). To further test our hypothesis, we measured event-related brain potentials (ERPs). The ERP results demonstrate that the observed slowing effect is reflected in a decrease of motor-related ERP components (Experiment 3). Perceiving others' hands physically restrained impairs motor preparation in the observer. Our findings suggest that observed environmental constraints are automatically mapped onto the observer's motor system. Such a mapping of motor restraints might facilitate action understanding. (C) 2008 Elsevier Ltd. All rights reserved.