School of Life & Health Sciences, Aston Brain Centre, Aston University, UK.
J Cogn Neurosci. 2012 Feb;24(2):507-20. doi: 10.1162/jocn_a_00120. Epub 2011 Aug 23.
Very little is known about the neural structures involved in the perception of realistic dynamic facial expressions. In the present study, a unique set of naturalistic dynamic facial emotional expressions was created. Through fMRI and connectivity analysis, a dynamic face perception network was identified, which is demonstrated to extend Haxby et al.'s [Haxby, J. V., Hoffman, E. A., & Gobbini, M. I. The distributed human neural system for face perception. Trends in Cognitive Science, 4, 223-233, 2000] distributed neural system for face perception. This network includes early visual regions, such as the inferior occipital gyrus, which is identified as insensitive to motion or affect but sensitive to the visual stimulus, the STS, identified as specifically sensitive to motion, and the amygdala, recruited to process affect. Measures of effective connectivity between these regions revealed that dynamic facial stimuli were associated with specific increases in connectivity between early visual regions, such as the inferior occipital gyrus and the STS, along with coupling between the STS and the amygdala, as well as the inferior frontal gyrus. These findings support the presence of a distributed network of cortical regions that mediate the perception of different dynamic facial expressions.
关于感知逼真动态面部表情所涉及的神经结构，人们知之甚少。在本研究中，我们创建了一组独特的自然主义动态面部情感表达。通过 fMRI 和连接分析，我们确定了一个动态面部感知网络，该网络证明扩展了 Haxby 等人的[Haxby, J. V., Hoffman, E. A., & Gobbini, M. I. 分布式人类面部感知神经网络。趋势认知科学，4, 223-233, 2000]的面部感知分布式神经网络。该网络包括早期视觉区域，例如下枕叶，其被确定为对运动或情感不敏感，但对视觉刺激敏感，STS 被确定为对运动敏感，杏仁核被招募来处理情感。这些区域之间的有效连接测量表明，动态面部刺激与早期视觉区域（例如下枕叶和 STS）之间的特定连接增加有关，同时还与 STS 和杏仁核之间以及额下回之间的耦合有关。这些发现支持了存在一个分布式皮质区域网络，该网络介导了不同动态面部表情的感知。
