Developmental Cognitive and Social Neuroscience Unit, Department of Paediatric Neurology and Child Development, Children's Hospital, University of Tübingen Medical School, University of Tübingen, D-72076 Tübingen, Germany.
Cereb Cortex. 2010 Oct;20(10):2361-7. doi: 10.1093/cercor/bhp304. Epub 2010 Jan 21.
Perception of dispositions of others revealed by movement is an essential ingredient of adaptive daily-life social behavior. Brain imaging points to several brain regions involved in visual processing of social interaction represented by motion of geometric shapes. However, temporal interrelations among these regions remain unknown. Keeping in mind that successful visual social perception depends on intact communication throughout the brain, we focus here on analysis of the induced gamma neuromagnetic response to social interaction revealed by motion. A peak of induced gamma activity of 62 Hz was found at 1 s from the stimulus onset over the right parieto-temporal junction. Two further enhancements in gamma response of lower frequency of 44 Hz occurred at 1.4 s over the medial prefrontal and posterior temporal cortices in the right hemisphere. Subsequent boosts of 44 Hz were found at 1.6 s over the left temporal and right posterior temporal cortices. For the first time, the findings identify the cortical network engaged in visual processing of social interaction revealed by motion and help to better understand proper functioning of the social brain circuitry.
对他人动作所揭示的性格倾向的感知，是适应日常生活中社会行为的一个重要组成部分。大脑成像指向几个参与代表几何形状运动的社会互动视觉处理的脑区。然而，这些区域之间的时间相互关系尚不清楚。考虑到成功的视觉社会感知依赖于大脑中完整的交流，我们在这里关注的是对运动所揭示的社会互动的诱导伽马神经磁响应的分析。在刺激开始后 1 秒，在右顶颞交界处发现了一个 62 Hz 的诱导伽马活动峰值。在右半球的内侧前额叶和后颞叶皮质，44 Hz 的伽马反应进一步增强，发生在 1.4 秒。随后，在 1.6 秒时，在左颞叶和右后颞叶皮质发现了 44 Hz 的增强。这些发现首次确定了参与运动所揭示的社会互动视觉处理的皮质网络，并有助于更好地理解社会大脑回路的正常功能。
