Communication with emblematic gestures: Shared and distinct neural correlates of expression and reception
Communication with emblematic gestures: Shared and distinct neural correlates of expression and reception
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DOI：
10.1002/hbm.21258
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发表时间：
2012-04-01
影响因子：
4.8
通讯作者：
Seitz, Ruediger J.
中科院分区：
文献类型：
--
作者：
Lindenberg, Robert;Uhlig, Marie;Seitz, Ruediger J.
象征性的（或象征性的）手势允许个人传达各种想法和情绪，从赞同到敌意。这些手势的使用涉及到说话者执行一个编码的运动动作，以及听话者对其的感知和解码。为了研究潜在的共同和不同的神经相关性，我们使用了功能磁共振成像任务，其中受试者观看了象征性的单手手势的视频剪辑。他们被要求（1）站在说话人的角度，想象自己正在做这些手势（表达条件）;（2）站在说话人的角度，想象自己正面对这些手势（接受条件）。共同的激活区域被发现在下额叶，内侧额叶，后颞叶皮质与左半球的优势，以及在小脑。具体参与表达或接收条件的区域之间的区别部分类似于视觉处理的背侧和腹侧流二分法，其在下额叶和内侧前额叶皮质中具有连接。手势表达的表象涉及背侧视觉流和高阶运动区。相比之下，手势接收包括与语义处理相关的区域，以及已知参与理解他人意图的内侧前额叶区域。总之，我们的研究结果提供了证据的象征性的手势处理的表征之间的地址和收件人之间的分离，除了在语言相关领域的共享组件。^Brain Mapp，2012. (c)2011 Wiley Periodicals，Inc.
Emblematic (or symbolic) gestures allow individuals to convey a variety of thoughts and emotions ranging from approval to hostility. The use of such gestures involves the execution of a codified motor act by the addresser and its perception and decoding by the addressee. To examine underlying common and distinct neural correlates, we used fMRI tasks in which subjects viewed video clips of emblematic one-hand gestures. They were asked to (1) take the perspective of the addresser and imagine executing the gestures (expression condition), and to (2) take the perspective of the addressee and imagine being confronted with the gestures (reception condition). Common areas of activation were found in inferior frontal, medial frontal, and posterior temporal cortices with left-hemispheric predominance as well as in the cerebellum. The distinction between regions specifically involved in the expression or reception condition partly resembled the dorsal and ventral stream dichotomy of visual processing with junctions in inferior frontal and medial prefrontal cortices. Imagery of gesture expression involved the dorsal visual stream as well as higher-order motor areas. In contrast, gesture reception encompassed regions related to semantic processing, and medial prefrontal areas known to be involved in the process of understanding the intentions of others. In conclusion, our results provide evidence for a dissociation in representations of emblematic gesture processing between addresser and addressee in addition to shared components in language-related areas. Hum Brain Mapp, 2012. (c) 2011 Wiley Periodicals, Inc.