| A theory of the visual motion coding in the primary visual cortex. | |
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MedLine Citation:
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PMID: 8624959 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This paper demonstrates that much of visual motion coding in the primary visual cortex can be understood from a theory of efficient motion coding in a multiscale representation. The theory predicts that cortical cells can have a spectrum of directional indices, be tuned to different directions of motion, and have spatiotemporally separable or inseparable receptive fields (RF). The predictions also include the following correlations between motion coding and spatial, chromatic, and stereo codings: the preferred speed is greater when the cell receptive field size is larger, the color channel prefers lower speed than the luminance channel, and both the optimal speeds and the preferred directions of motion can be different for inputs from different eyes to the same neuron. These predictions agree with experimental observations. In addition, this theory makes predictions that have not been experimentally investigated systematically and provides a testing ground for an efficient multiscale coding framework. These predictions are as follows: (1) if nearby cortical cells of a given preferred orientation and scale prefer opposite directions of motion and have a quadrature RF phase relationship with each other, then they will have the same directional index, (2) a single neuron can have different optimal motion speeds for opposite motion directions of monocular stimuli, and (3) a neuron's ocular dominance may change with motion direction if the neuron prefers opposite directions for inputs from different eyes. |
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Authors:
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Z Li |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Neural computation Volume: 8 ISSN: 0899-7667 ISO Abbreviation: Neural Comput Publication Date: 1996 May |
Date Detail:
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Created Date: 1996-06-26 Completed Date: 1996-06-26 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9426182 Medline TA: Neural Comput Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 705-30 Citation Subset: IM; S |
Affiliation:
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Computer Science Department, Hong Kong University of Science and Technology, Kowloon, Hong Kong. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Color Perception
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physiology Models, Neurological* Motion Perception / physiology* Neurons / physiology Space Perception / physiology Vision, Binocular / physiology Visual Cortex / cytology, physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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