Layer-Dependent Attentional Processing by Top-down Signals in a Visual Cortical Microcircuit Model
نویسندگان
چکیده
منابع مشابه
Layer-Dependent Attentional Processing by Top-down Signals in a Visual Cortical Microcircuit Model
A vast amount of information about the external world continuously flows into the brain, whereas its capacity to process such information is limited. Attention enables the brain to allocate its resources of information processing to selected sensory inputs for reducing its computational load, and effects of attention have been extensively studied in visual information processing. However, how t...
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Theeuwes (2010) summarizes an impressive number of studies demonstrating interference by irrelevant visual singletons in computer experiments with humans. In these studies, if participants search for a relevant singleton target, such as the single diamond among circles (i.e., a shape singleton), an irrelevant singleton distractor, such as the single red circle among the green stimuli (i.e., a c...
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Visual perception is not only based on incoming visual signals but also on information about a multimodal reference frame that incorporates vestibulo-proprioceptive input and motor signals. In addition, top-down modulation of visual processing has previously been demonstrated during cognitive operations including selective attention and working memory tasks. In the absence of a stable gravitati...
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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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Selective attention is a fundamental cognitive function that uses top-down signals to orient and prioritize information processing in the brain. Single-cell recordings from behaving monkeys have revealed a number of attention-induced effects on sensory neurons, and have given rise to contrasting viewpoints about the neural underpinning of attentive processing. Moreover, there is evidence that a...
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ژورنال
عنوان ژورنال: Frontiers in Computational Neuroscience
سال: 2011
ISSN: 1662-5188
DOI: 10.3389/fncom.2011.00031