Automatic top-down processes mediate selective attention
نویسندگان
چکیده
منابع مشابه
Top-Down Signals in Visual Selective Attention
This thesis describes experimental work on the brain mechanisms underlying human visual selective attention, with a focus on top-down activity changes in visual cortex. Using a combination of methods, the experiments addressed related questions concerning the functional significance and putative origins of such activity modulations due to selective attention. More specifically, the experiment d...
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Allocation of attentional resources to portions of the available sensory input can be regulated by bottom-up processes, i.e., spontaneous orientation towards an oncoming stimulus (stimulus-driven attention), and by top-down processes, i.e., intentionally and driven by knowledge, expectation and goals. The present study aimed at advancing the understanding of brain networks mediating bottom-up a...
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Selective attention involves top-down modulation of sensory cortical areas, such that responses to relevant information are enhanced whereas responses to irrelevant information are suppressed. Suppression of irrelevant information, unlike enhancement of relevant information, has been shown to be deficient in aging. Although these attentional mechanisms have been well characterized within the vi...
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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...
متن کاملSequential recognition of superimposed patterns with top-down selective attention
Top–down attention is a cognitive mechanism to ,lter out irrelevant information from sensory input. Unlike bottom–up attention based on the sensory signal itself the top–down attention process is originated from the higher brain, which consists of previous knowledge about the sensory signals. A simple computational model is developed for the top–down attention. In this model an attention gain c...
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ژورنال
عنوان ژورنال: Journal of Vision
سال: 2013
ISSN: 1534-7362
DOI: 10.1167/13.9.137