期刊
CEREBRAL CORTEX
卷 26, 期 5, 页码 2059-2073出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/cercor/bhv028
关键词
change detection; functional connectivity; functional MRI; long-term memory; posterior parietal cortex
资金
- National Institute of Health [R01EY022229]
- National Science Foundation [BCS-0726061, SMA-0835976]
Visual attentional capacity is severely limited, but humans excel in familiar visual contexts, in part because long-term memories guide efficient deployment of attention. To investigate the neural substrates that support memory-guided visual attention, we performed a set of functional MRI experiments that contrast long-term, memory-guided visuospatial attention with stimulus-guided visuospatial attention in a change detection task. Whereas the dorsal attention network was activated for both forms of attention, the cognitive control network (CCN) was preferentially activated during memory-guided attention. Three posterior nodes in the CCN, posterior precuneus, posterior callosal sulcus/mid-cingulate, and lateral intraparietal sulcus exhibited the greatest specificity for memory-guided attention. These 3 regions exhibit functional connectivity at rest, and we propose that they form a subnetwork within the broader CCN. Based on the task activation patterns, we conclude that the nodes of this subnetwork are preferentially recruited for long-term memory guidance of visuospatial attention.
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