The neurophysiology of human biological motion processing: a high-density electrical mapping study.
The neurophysiology of human biological motion processing: a high-density electrical mapping study.
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DOI：
10.1016/j.neuroimage.2011.01.058
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发表时间：
2011-05-01
期刊：
影响因子：
5.7
通讯作者：
Foxe JJ
中科院分区：
文献类型：
--
作者：
Krakowski AI;Ross LA;Snyder AC;Sehatpour P;Kelly SP;Foxe JJ
生物运动（BM）的神经处理具有深远的实验意义，因为我们通常通过另一个人的运动来解释他们的直接意图。神经影像学指出了一个专门的大脑皮层网络来处理生物运动。在这里，高密度电映射和源分析技术被用来询问这个网络中信息处理的时间。参与者观看描绘标准身体运动（例如跳跃）的点光显示器，同时记录事件相关电位（ERP），并将其与杂乱运动控制刺激的ERP进行比较。在一对实验中，确定了BM特异性加工的三个主要阶段：1）BM敏感性调制的最早阶段的特征在于刺激开始后100和200 ms之间的ERP的正移。这种调制仅在右半球观察到，源分析表明可能发生器靠近与一般运动处理（KO/hMT）相关的区域。2)BM敏感性的第二阶段发生在200至350毫秒，其特征在于一个强大的负向ERP调制后中颞区双边。源分析指出双侧发生器位于或靠近后上级颞沟（STS）。3)第三个阶段的处理是明显的，只有在我们的第二个实验中，参与者积极参加BM方面的刺激，并表现为一个中央-顶叶积极ERP偏转，可能与后来的认知过程。这些结果指出，非常早期的感觉登记的生物运动，并强调互动的作用，后STS在分析其他生物体的运动。
The neural processing of biological motion (BM) is of profound experimental interest since it is often through the movement of another that we interpret their immediate intentions. Neuroimaging points to a specialized cortical network for processing biological motion. Here, high-density electrical mapping and source-analysis techniques were employed to interrogate the timing of information processing across this network. Participants viewed point-light-displays depicting standard body movements (e.g. jumping), while event-related potentials (ERPs) were recorded and compared to ERPs to scrambled motion control stimuli. In a pair of experiments, three major phases of BM-specific processing were identified: 1) The earliest phase of BM-sensitive modulation was characterized by a positive shift of the ERP between 100 and 200 ms after stimulus onset. This modulation was observed exclusively over the right hemisphere and source-analysis suggested a likely generator in close proximity to regions associated with general motion processing (KO/hMT). 2) The second phase of BM-sensitivity occurred from 200 to 350 ms, characterized by a robust negative-going ERP modulation over posterior middle temporal regions bilaterally. Source-analysis pointed to bilateral generators at or near the posterior superior temporal sulcus (STS). 3) A third phase of processing was evident only in our second experiment, where participants actively attended the BM aspect of the stimuli, and was manifest as a centro-parietal positive ERP deflection, likely related to later cognitive processes. These results point to very early sensory registration of biological motion, and highlight the interactive role of the posterior STS in analyzing the movements of other living organisms.
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影响因子：
3.4
作者：
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通讯作者：
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DOI：
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