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Top-down modulation: bridging selective attention and working memory
DOI:10.1016/j.tics.2011.11.014.png)
Abstract
En 中文
Selective attention, the ability to focus our cognitive resources on information relevant to our goals, influences working memory (WM) performance. Indeed, attention and working memory are increasingly viewed as overlapping constructs. Here, we review recent evidence from human neurophysiological studies demonstrating that top-down modulation serves as a common neural mechanism underlying these two cognitive operations. The core features include activity modulation in stimulus-selective sensory cortices with concurrent engagement of prefrontal and parietal control regions that function as sources of top-down signals. Notably, top-down modulation is engaged during both stimulus-present and stimulus-absent stages of WM tasks; that is, expectation of an ensuing stimulus to be remembered, selection and encoding of stimuli, maintenance of relevant information in mind and memory retrieval.
Keywords:
SHORT-TERM-MEMORY
HUMAN VISUAL-CORTEX
PREFRONTAL CORTEX
ORIENTING ATTENTION
MENTAL REPRESENTATIONS
DIRECTED ATTENTION
SPATIAL ATTENTION
IRRELEVANT INFORMATION
INDIVIDUAL-DIFFERENCES
EXTERNAL INTERFERENCE
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