| Fast-scale adaptive changes of directional tuning in fly tangential cells are explained by a static nonlinearity. | |
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MedLine Citation:
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PMID: 17766297 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The response of vertebrate motion-sensitive neurons to a directional stimulus is affected by the direction of the stimulus that immediately preceded it. These nonlinear effects are also observed for orientation tuning and are typically interpreted as fast-scale adaptive changes. We verified that similar effects are observed for spiking tangential cells in the fly lobula plate. We also investigated the spatial selectivity of these effects by presenting multiple patches at different positions within the receptive field, and found that the effects are strictly local. We modelled the data using elementary operators (linear filters and threshold nonlinearities). A satisfactory account of the results is obtained when an early static nonlinearity acts on the outputs of multiple front-end filters that are subsequently pooled in a spatially restricted manner by the tangential cell. In line with recent studies, these findings emphasize the importance of testing simple nonlinear models before attempting more elaborate interpretations of fast-scale adaptive phenomena in single neurons. We discuss a potential neural implementation of the model based on medullar projections to the lobula plate. |
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Authors:
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Peter Neri |
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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: The Journal of experimental biology Volume: 210 ISSN: 0022-0949 ISO Abbreviation: J. Exp. Biol. Publication Date: 2007 Sep |
Date Detail:
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Created Date: 2007-09-03 Completed Date: 2007-12-27 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0243705 Medline TA: J Exp Biol Country: England |
Other Details:
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Languages: eng Pagination: 3199-208 Citation Subset: IM |
Affiliation:
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Applied Vision Research Centre, City University, Northampton Square, London EC1V 0HB, UK. pn@white.stanford.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Brain Mapping* Diptera / physiology* Electrophysiology Flight, Animal / physiology Models, Biological Motion Neurons / physiology* Nonlinear Dynamics Spatial Behavior / physiology |
| Grant Support | |
ID/Acronym/Agency:
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//Wellcome Trust |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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