Tracking the Time Course of Action Priming on Object Recognition: Evidence for Fast and Slow Influences of Action on Perception
Tracking the Time Course of Action Priming on Object Recognition: Evidence for Fast and Slow Influences of Action on Perception
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DOI：
10.1162/jocn.2010.21543
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发表时间：
2011-08-01
影响因子：
3.2
通讯作者：
Graf, Markus
中科院分区：
文献类型：
--
作者：
Kiefer, Markus;Sim, Eun-Jin;Graf, Markus
感知和行动被经典地认为是由功能和神经解剖学上不同的机制支持的。然而，最近使用动作启动范式的行为研究挑战了这一观点，并表明动作表征可以促进物体识别。这项研究确定了在视觉加工的早期阶段，即在最初的150毫秒内，动作表征是否会影响物体识别。为此，通过记录事件相关电位，研究了这种动作启动效应背后的大脑激活的时间进程。按顺序向受试者呈现两个必须命名的可操作对象(例如，工具)。在一致条件下，两个客体提供了相似的动作，而在不一致条件下提供了不同的动作。为了检验启动通道对动作启动的影响，第一个物体(启动)被呈现为图片或文字。我们发现，早在目标启动后100毫秒，图片刺激就会在头皮中央产生事件相关电位效应，而言语启动则不然。对N400事件相关事件相关成分的动作启动效应在图片和单词启动下均被获得，这是已知的索引语义整合过程。早期效应在额顶运动网络中产生，而晚期效应反映了前颞区的活动。本研究结果表明，动作启动通过快、慢两种途径影响物体再认：动作启动只在图画启动刺激下影响快速视觉运动过程。然而，它也调节了相对较慢的概念整合过程，而不依赖于主要通道。
Perception and action are classically thought to be supported by functionally and neuroanatomically distinct mechanisms. However, recent behavioral studies using an action priming paradigm challenged this view and showed that action representations can facilitate object recognition. This study determined whether action representations influence object recognition during early visual processing stages, that is, within the first 150 msec. To this end, the time course of brain activation underlying such action priming effects was examined by recording ERPs. Subjects were sequentially presented with two manipulable objects (e. g., tools), which had to be named. In the congruent condition, both objects afforded similar actions, whereas dissimilar actions were afforded in the incongruent condition. In order to test the influence of the prime modality on action priming, the first object (prime) was presented either as picture or as word. We found an ERP effect of action priming over the central scalp as early as 100 msec after target onset for pictorial, but not for verbal primes. A later action priming effect on the N400 ERP component known to index semantic integration processes was obtained for both picture and word primes. The early effect was generated in a fronto-parietal motor network, whereas the late effect reflected activity in anterior temporal areas. The present results indicate that action priming influences object recognition through both fast and slow pathways: Action priming affects rapid visuomotor processes only when elicited by pictorial prime stimuli. However, it alsomodulates comparably slow conceptual integration processes independent of the prime modality.