The role of the extrastriate body area in action perception
The role of the extrastriate body area in action perception
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DOI：
10.1080/17470910600668854
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发表时间：
2006-03-01
影响因子：
2
通讯作者：
Tew, Bryn D.
中科院分区：
文献类型：
--
作者：
Downing, Paul E.;Peelen, Marius V.;Tew, Bryn D.
许多皮质区域对人体形态及其行为的各个方面作出反应。外体面积（EBA）对这个网络的贡献是什么？特别是，EBA是否参与构建观察到的动作的动态表示？我们用功能磁共振成像扫描了16名参与者，同时他们观看了两种刺激序列。在相干条件下，从一个单一的，非及物的全身动作电影的静态帧以正确的顺序呈现。在非相干条件下，呈现一系列来自多个动作（涉及一个参与者）的帧。ROI分析显示，与MT+区和颞后上沟不同，EBA对非相干条件的响应大于对相干条件的响应。全脑分析显示，与观察和控制运动有关的顶叶和额叶区域的相干序列激活增加。我们认为，当后续图像描述相对相似的姿势（连贯条件）与相对不同的姿势（不连贯条件）时，EBA响应会发生变化。我们认为EBA在动作感知中发挥着独特的作用，它代表了人体形态的静态结构，而不是动态方面。
Numerous cortical regions respond to aspects of the human form and its actions. What is the contribution of the extrastriate body area (EBA) to this network? In particular, is the EBA involved in constructing a dynamic representation of observed actions? We scanned 16 participants with fMRI while they viewed two kinds of stimulus sequences. In the coherent condition, static frames from a movie of a single, intransitive whole-body action were presented in the correct order. In the incoherent condition, a series of frames from multiple actions (involving one actor) were presented. ROI analyses showed that the EBA, unlike area MT+and the posterior superior temporal sulcus, responded more to the incoherent than to the coherent conditions. Whole brain analyses revealed increased activation to the coherent sequences in parietal and frontal regions that have been implicated in the observation and control of movement. We suggest that the EBA response adapts when succeeding images depict relatively similar postures (coherent condition) compared to relatively different postures (incoherent condition). We propose that the EBA plays a unique role in the perception of action, by representing the static structure, rather than dynamic aspects, of the human form.