Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen, Nijmegen, The Netherlands.
J Neurophysiol. 2010 Aug;104(2):972-83. doi: 10.1152/jn.01079.2009. Epub 2010 Jun 10.
The present study investigated the selection for action hypothesis, according to which a subject's action intention to perform a movement influences the way in which visual information is being processed. Subjects were instructed in separate blocks either to grasp or to point to a three-dimensional target-object and event-related potentials were recorded relative to stimulus onset. It was found that grasping compared with pointing resulted in a stronger N1 component and a subsequent selection negativity, which were localized to the lateral occipital complex. These effects suggest that the intention to grasp influences the processing of action-relevant features in ventral stream areas already at an early stage (e.g., enhanced processing of object orientation for grasping). These findings provide new insight in the neural and temporal dynamics underlying perception-action coupling and provide neural evidence for a selection for action principle in early human visual processing.
本研究调查了动作选择假说，根据该假说，主体执行运动的动作意图会影响视觉信息的处理方式。在不同的分组中，受试者被指示抓握或指向一个三维目标物体，并且相对于刺激开始记录事件相关电位。结果发现，与指向相比，抓握导致更强的 N1 成分和随后的选择负性，这些成分定位于外侧枕叶复合体。这些效应表明，抓握的意图已经在早期阶段影响了腹侧流区域中与动作相关的特征的处理（例如，增强了抓握的物体方向的处理）。这些发现为感知-动作耦合的神经和时间动态提供了新的见解，并为早期人类视觉处理中的动作选择原则提供了神经证据。
