Top-down influences on visual processing

Re-entrant or feedback pathways between cortical areas carry rich and varied information about behavioural context, including attention, expectation, perceptual tasks, working memory and motor commands. Neurons receiving such inputs effectively function as adaptive processors that are able to assume...

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Bibliographic Details
Published inNature reviews. Neuroscience Vol. 14; no. 5; pp. 350 - 363
Main Authors Gilbert, Charles D, Li, Wu
Format Journal Article
LanguageEnglish
Published England Nature Publishing Group 01.05.2013
Subjects
Animals
Attention
Humans
Neurons
Nonlinear Dynamics
Physiological aspects
Vision, Ocular - physiology
Visual Cortex - cytology
Visual Cortex - physiology
Visual Pathways - physiology
Visual perception
Visual Perception - physiology
United States
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Summary:Re-entrant or feedback pathways between cortical areas carry rich and varied information about behavioural context, including attention, expectation, perceptual tasks, working memory and motor commands. Neurons receiving such inputs effectively function as adaptive processors that are able to assume different functional states according to the task being executed. Recent data suggest that the selection of particular inputs, representing different components of an association field, enable neurons to take on different functional roles. In this Review, we discuss the various top-down influences exerted on the visual cortical pathways and highlight the dynamic nature of the receptive field, which allows neurons to carry information that is relevant to the current perceptual demands.
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ISSN:1471-003X
1471-0048
1469-3178
DOI:10.1038/nrn3476