Orienting attention to locations in perceptual versus mental representations
Orienting attention to locations in perceptual versus mental representations
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DOI：
10.1162/089892904322926700
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发表时间：
2004-04-01
影响因子：
3.2
通讯作者：
Mesulam, MM
中科院分区：
文献类型：
--
作者：
Nobre, AC;Coull, JT;Mesulam, MM
广泛的临床和影像学研究的特点是神经网络介导的空间注意力的自适应分布。在日常行为中，注意力的分配不仅受外在的纹身的指导，而且受其空间布局的心理表征的指导。我们使用事件相关功能磁共振成像来识别参与将注意力引导到作为心理表征的阵列中的位置的神经系统，并将其与将空间注意力引导到外部世界中的位置的系统进行比较。我们发现，空间认知的这两个关键方面受到广泛重叠的网络的支持。然而，我们也发现，右顶叶皮层的区域选择性地参与定向注意到个人以外的空间，而几个额叶区域选择性地参与定向注意线内的心理表征。
Extensive clinical and imaging research has characterized the neural networks mediating the adaptive distribution of spatial attention. In everyday behavior, the distribution of attention is guided not only by extrapersonal tat-gets but also by mental representations of their spatial layout. We used event-related functional magnetic resonance imaging to identify the neural system involved in directing attention to locations in arrays held as mental representations, and to compare it with the system for directing spatial attention to locations in the external world. We found that these two crucial aspects of spatial cognition are subserved by extensively overlapping networks. However, we also found that a region of right parietal cortex selectively participated in orienting attention to the extrapersonal space, whereas several frontal lobe regions selectively participated in orienting attention within on-line mental representations.