Observing social gestures: an fMRI study
Observing social gestures: an fMRI study
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DOI：
10.1007/s00221-008-1352-6
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发表时间：
2008-06-01
影响因子：
2
通讯作者：
Grafman, Jordan
中科院分区：
文献类型：
--
作者：
Knutson, Kristine M.;McClellan, Erin M.;Grafman, Jordan
我们调查了手势的社交内容对大脑激活模式的影响。我们在与事件相关的功能磁共振成像实验中使用了3x3x3的析因设计，参与者观察了不同类型(法西斯式敬礼、挥手或手臂抬起)、一次显示的图像数量和面部频率的手势。我们试图确定，增加手势的社交内容是否会将激活从参与镜像神经元活动的传统感觉运动区扩散到与社交行为有关的前额叶区域。结果表明，与不那么挑衅性但仍具有社会意义的手势(WAVE)相比，观看高度挑衅性的手势(法西斯式敬礼)会显示出前额叶和边缘区域的激活。此外，正如预期的那样，当参与者观察到更多的手势参与者时，会有更多的额叶下回激活。此外，羞愧和失败的心理特征影响了顶叶下叶的激活，这是镜像神经系统的一部分，与波形对比相比，法西斯敬礼。我们的结论是，观察社交手势会激活大脑的社交和情绪处理区域，激活程度取决于观察者的心理特征。
We investigated the effects of social content of gestures on brain activation patterns. We used a 3 x 3 x 3 factorial design in an event-related functional magnetic resonance imaging experiment with participants observing gestures varied by type (fascist salute, wave, or arm lift), number of images shown at a time, and face frequency. We sought to determine whether increasing the social content of the gesture spreads activation from traditional sensorimotor regions engaged in mirror neuron activity to prefrontal regions concerned with social behavior. Results indicate that viewing a highly provocative gesture (fascist salute) compared to a less provocative but still socially meaningful gesture (wave) reveals activation in prefrontal and limbic areas. In addition, as expected there was more inferior frontal gyrus activation when participants observed a greater number of gesturing actors. Additionally, the psychological characteristics of shame and defeat affected activation in the inferior parietal lobe, which is part of the mirror neuron system, for the fascist salute compared to the wave contrast. We conclude that observing social gestures activates social- and emotion-processing areas of the brain, and the activation varies depending on the observer's psychological characteristics.