Neural Mechanisms of Object-Based Attention
Neural Mechanisms of Object-Based Attention
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DOI：
10.1126/science.1247003
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发表时间：
2014-04-25
期刊：
影响因子：
56.9
通讯作者：
Desimone, Robert
中科院分区：
文献类型：
--
作者：
Baldauf, Daniel;Desimone, Robert
我们如何注意那些不能被位置分开的物体和它们的特征还不为人所知。我们呈现了两个在时间和空间上重叠的物体流，脸和房子，并使用脑磁图和功能性磁共振成像来分离神经元对有人看管和无人看管物体的反应。对面孔和房屋的注意分别增强了梭状面区和海马旁位区的感觉反应。感觉反应的增加伴随着下额叶交界处、IFJ和FFA或PPA之间的诱导伽马同步，这取决于参与的对象。IFJ似乎是同步的驱动因素，因为与FFA或PPA相比，IFJ的伽马相提前了20毫秒。因此，在基于对象的注意过程中，IFJ至少在一定程度上通过与FFA和PPA等专门区域的耦合振荡来指导视觉处理流程。
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.