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Spatial and temporal proximity as factors in shape recognition

Prior research from this laboratory examined minimal stimulus conditions that allow for recognition of objects. Using briefly flashed dots that marked the outer border of objects, it was found that timing differentials within and among successive dot pairs affected recognition, with significant decl...

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Detalles Bibliográficos
Autor principal: Greene, Ernest
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2007
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1894631/
https://www.ncbi.nlm.nih.gov/pubmed/17550614
http://dx.doi.org/10.1186/1744-9081-3-27
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author Greene, Ernest
author_facet Greene, Ernest
author_sort Greene, Ernest
collection PubMed
description Prior research from this laboratory examined minimal stimulus conditions that allow for recognition of objects. Using briefly flashed dots that marked the outer border of objects, it was found that timing differentials within and among successive dot pairs affected recognition, with significant declines being seen by the addition of temporal separations in the millisecond range. These experiments were done with dot pairs that had close spatial proximity, which leaves open the possibility that the effects could be attributed to strictly local neural encoding processes. The present research reports that spatial separation of pair members resulted in declines in recognition that were similar to those produced with close spacing of pair members. Both for close and separated dot pairs, recognition was best when they were displayed with near simultaneity, which likely generated synchronized spikes in the retina. These results provide cognitive evidence in support of proposals that synchronous neural activity is part of the image encoding process. The physiological literature is surveyed and discussed in an effort to delineate the issues, and a tentative model of retinal response to these stimulus conditions is offered.
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spelling pubmed-18946312007-06-19 Spatial and temporal proximity as factors in shape recognition Greene, Ernest Behav Brain Funct Research Prior research from this laboratory examined minimal stimulus conditions that allow for recognition of objects. Using briefly flashed dots that marked the outer border of objects, it was found that timing differentials within and among successive dot pairs affected recognition, with significant declines being seen by the addition of temporal separations in the millisecond range. These experiments were done with dot pairs that had close spatial proximity, which leaves open the possibility that the effects could be attributed to strictly local neural encoding processes. The present research reports that spatial separation of pair members resulted in declines in recognition that were similar to those produced with close spacing of pair members. Both for close and separated dot pairs, recognition was best when they were displayed with near simultaneity, which likely generated synchronized spikes in the retina. These results provide cognitive evidence in support of proposals that synchronous neural activity is part of the image encoding process. The physiological literature is surveyed and discussed in an effort to delineate the issues, and a tentative model of retinal response to these stimulus conditions is offered. BioMed Central 2007-06-05 /pmc/articles/PMC1894631/ /pubmed/17550614 http://dx.doi.org/10.1186/1744-9081-3-27 Text en Copyright © 2007 Greene; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( (http://creativecommons.org/licenses/by/2.0) ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research
Greene, Ernest
Spatial and temporal proximity as factors in shape recognition
title Spatial and temporal proximity as factors in shape recognition
title_full Spatial and temporal proximity as factors in shape recognition
title_fullStr Spatial and temporal proximity as factors in shape recognition
title_full_unstemmed Spatial and temporal proximity as factors in shape recognition
title_short Spatial and temporal proximity as factors in shape recognition
title_sort spatial and temporal proximity as factors in shape recognition
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1894631/
https://www.ncbi.nlm.nih.gov/pubmed/17550614
http://dx.doi.org/10.1186/1744-9081-3-27
work_keys_str_mv AT greeneernest spatialandtemporalproximityasfactorsinshaperecognition