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当动作观察促进视觉感知时:视觉运动区域的激活有助于物体识别。

When Action Observation Facilitates Visual Perception: Activation in Visuo-Motor Areas Contributes to Object Recognition.

作者信息

Sim Eun-Jin, Helbig Hannah B, Graf Markus, Kiefer Markus

机构信息

Department of Psychiatry, University of Ulm, Ulm, Germany.

Max-Planck-Institute for Biological Cybernetics, Tübingen, Germany.

出版信息

Cereb Cortex. 2015 Sep;25(9):2907-18. doi: 10.1093/cercor/bhu087. Epub 2014 May 2.

Abstract

Recent evidence suggests an interaction between the ventral visual-perceptual and dorsal visuo-motor brain systems during the course of object recognition. However, the precise function of the dorsal stream for perception remains to be determined. The present study specified the functional contribution of the visuo-motor system to visual object recognition using functional magnetic resonance imaging and event-related potential (ERP) during action priming. Primes were movies showing hands performing an action with an object with the object being erased, followed by a manipulable target object, which either afforded a similar or a dissimilar action (congruent vs. incongruent condition). Participants had to recognize the target object within a picture-word matching task. Priming-related reductions of brain activity were found in frontal and parietal visuo-motor areas as well as in ventral regions including inferior and anterior temporal areas. Effective connectivity analyses suggested functional influences of parietal areas on anterior temporal areas. ERPs revealed priming-related source activity in visuo-motor regions at about 120 ms and later activity in the ventral stream at about 380 ms. Hence, rapidly initiated visuo-motor processes within the dorsal stream functionally contribute to visual object recognition in interaction with ventral stream processes dedicated to visual analysis and semantic integration.

摘要

最近的证据表明,在物体识别过程中,腹侧视觉感知和背侧视觉运动脑系统之间存在相互作用。然而,背侧通路在感知方面的确切功能仍有待确定。本研究使用功能磁共振成像和动作启动期间的事件相关电位(ERP),明确了视觉运动系统对视觉物体识别的功能贡献。启动刺激是一些电影,展示了手对一个物体执行动作,然后该物体被擦除,接着出现一个可操作的目标物体,该目标物体要么提供相似的动作,要么提供不同的动作(一致与不一致条件)。参与者必须在图片-单词匹配任务中识别目标物体。在额叶和顶叶视觉运动区域以及包括颞下回和颞前区在内的腹侧区域发现了与启动相关的脑活动减少。有效连接性分析表明顶叶区域对颞前区域有功能影响。ERP显示,在大约120毫秒时,视觉运动区域出现与启动相关的源活动,在大约380毫秒时,腹侧通路出现后期活动。因此,背侧通路中快速启动的视觉运动过程在功能上有助于视觉物体识别,与专门用于视觉分析和语义整合的腹侧通路过程相互作用。

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