Zhang Hui, Tian Jie, Liu Jiangang, Li Jun, Lee Kang
Institute of Automation Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences. Beijing, 100190, China.
Neurosci Lett. 2009 Apr 17;454(1):1-5. doi: 10.1016/j.neulet.2009.02.054. Epub 2009 Feb 28.
We investigated 0.01-0.08Hz low-frequency fluctuations of BOLD-fMRI signals in the face and object-responsive regions during the resting-state and during face or object viewing tasks. By comparing the effects of the face-responsive regions of interest with those of the object-responsive regions of interest, we observed a distributed cortical network of face perception during the resting-state among posterior fusiform gyrus, inferior occipital gyrus, and superior temporal sulcus. This network was also significantly activated during the face perception task. The face perception task also activated additional areas in the frontal and parietal regions. Our results suggest that the "core" but not the "extended" network for face processing is already in some form of activation during the resting-state. A possible function of the resting-state face perception network is perhaps to prepare the brain to process faces that individuals are highly likely to encounter in their environment.
我们研究了静息状态以及面部或物体观察任务期间，面部和物体反应区域中血氧水平依赖性功能磁共振成像（BOLD-fMRI）信号的0.01-0.08Hz低频波动。通过比较感兴趣的面部反应区域与感兴趣的物体反应区域的效应，我们观察到在静息状态下，梭状回后部、枕下回和颞上沟之间存在一个分布式的面部感知皮质网络。在面部感知任务期间，该网络也被显著激活。面部感知任务还激活了额叶和顶叶区域的其他区域。我们的结果表明，用于面部处理的“核心”而非“扩展”网络在静息状态下已经以某种形式被激活。静息状态下面部感知网络的一个可能功能可能是使大脑做好处理个体在其环境中极有可能遇到的面部的准备。
