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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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Formato: | Texto |
Lenguaje: | English |
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BioMed Central
2007
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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. |
format | Text |
id | pubmed-1894631 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2007 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
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 |