McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, 02139 MA, USA.
Science. 2014 Apr 25;344(6182):424-7. doi: 10.1126/science.1247003. Epub 2014 Apr 10.
How we attend to objects and their features that cannot be separated by location is not understood. We presented two temporally and spatially overlapping streams of objects, faces versus houses, and used magnetoencephalography and functional magnetic resonance imaging to separate neuronal responses to attended and unattended objects. Attention to faces versus houses enhanced the sensory responses in the fusiform face area (FFA) and parahippocampal place area (PPA), respectively. The increases in sensory responses were accompanied by induced gamma synchrony between the inferior frontal junction, IFJ, and either FFA or PPA, depending on which object was attended. The IFJ appeared to be the driver of the synchrony, as gamma phases were advanced by 20 ms in IFJ compared to FFA or PPA. Thus, the IFJ may direct the flow of visual processing during object-based attention, at least in part through coupled oscillations with specialized areas such as FFA and PPA.
我们对于那些不能通过位置分开的物体及其特征的注意方式还没有被理解。我们呈现了两个时间和空间上重叠的物体流，人脸对房屋，并用磁共振成像和功能磁共振成像来分离注意和不注意的物体的神经元反应。相对于房屋，对面孔的注意分别增强了梭状回面孔区（FFA）和旁海马区位置区（PPA）的感觉反应。感觉反应的增加伴随着下额联合（IFJ）与 FFA 或 PPA 之间的诱导伽马同步，具体取决于注意哪个物体。IFJ 似乎是同步的驱动者，因为与 FFA 或 PPA 相比，IFJ 的伽马相位提前了 20 毫秒。因此，IFJ 可能在基于对象的注意过程中引导视觉处理的流动，至少部分通过与 FFA 和 PPA 等专门区域的耦合振荡来实现。
