Continuous spatial representations in the olfactory bulb may reflect perceptual categories

In sensory processing of odors, the olfactory bulb is an important relay station, where odor representations are noise-filtered, sharpened, and possibly re-organized. An organization by perceptual qualities has been found previously in the piriform cortex, however several recent studies indicate tha...

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Detalles Bibliográficos
Autores: Auffarth, Benjamin, Gutiérrez Gálvez, Agustín, Marco Colás, Santiago
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2011
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/138038
Acceso en línea:https://hdl.handle.net/2445/138038
Access Level:acceso abierto
Palabra clave:Olfacte
Olors
Smell
Odors
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spelling Continuous spatial representations in the olfactory bulb may reflect perceptual categoriesAuffarth, BenjaminGutiérrez Gálvez, AgustínMarco Colás, SantiagoOlfacteOlorsSmellOdorsIn sensory processing of odors, the olfactory bulb is an important relay station, where odor representations are noise-filtered, sharpened, and possibly re-organized. An organization by perceptual qualities has been found previously in the piriform cortex, however several recent studies indicate that the olfactory bulb code reflects behaviorally relevant dimensions spatially as well as at the population level. We apply a statistical analysis on 2-deoxyglucose images, taken over the entire bulb of glomerular layer of the rat, in order to see how the recognition of odors in the nose is translated into a map of odor quality in the brain. We first confirm previous studies that the first principal component could be related to pleasantness, however the next higher principal components are not directly clear. We then find mostly continuous spatial representations for perceptual categories. We compare the space spanned by spatial and population codes to human reports of perceptual similarity between odors and our results suggest that perceptual categories could be already embedded in glomerular activations and that spatial representations give a better match than population codes. This suggests that human and rat perceptual dimensions of odorant coding are related and indicates that perceptual qualities could be represented as continuous spatial codes of the olfactory bulb glomerulus populationFrontiers Media2011info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/138038Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.3389/fnsys.2011.00082Frontiers in systems Neuroscience, 2011, vol. 5, num. 82, p. 1-8https://doi.org/10.3389/fnsys.2011.00082cc-by (c) Auffarth, Benjamin et al., 2011http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1380382026-05-27T06:46:51Z
dc.title.none.fl_str_mv Continuous spatial representations in the olfactory bulb may reflect perceptual categories
title Continuous spatial representations in the olfactory bulb may reflect perceptual categories
spellingShingle Continuous spatial representations in the olfactory bulb may reflect perceptual categories
Auffarth, Benjamin
Olfacte
Olors
Smell
Odors
title_short Continuous spatial representations in the olfactory bulb may reflect perceptual categories
title_full Continuous spatial representations in the olfactory bulb may reflect perceptual categories
title_fullStr Continuous spatial representations in the olfactory bulb may reflect perceptual categories
title_full_unstemmed Continuous spatial representations in the olfactory bulb may reflect perceptual categories
title_sort Continuous spatial representations in the olfactory bulb may reflect perceptual categories
dc.creator.none.fl_str_mv Auffarth, Benjamin
Gutiérrez Gálvez, Agustín
Marco Colás, Santiago
author Auffarth, Benjamin
author_facet Auffarth, Benjamin
Gutiérrez Gálvez, Agustín
Marco Colás, Santiago
author_role author
author2 Gutiérrez Gálvez, Agustín
Marco Colás, Santiago
author2_role author
author
dc.subject.none.fl_str_mv Olfacte
Olors
Smell
Odors
topic Olfacte
Olors
Smell
Odors
description In sensory processing of odors, the olfactory bulb is an important relay station, where odor representations are noise-filtered, sharpened, and possibly re-organized. An organization by perceptual qualities has been found previously in the piriform cortex, however several recent studies indicate that the olfactory bulb code reflects behaviorally relevant dimensions spatially as well as at the population level. We apply a statistical analysis on 2-deoxyglucose images, taken over the entire bulb of glomerular layer of the rat, in order to see how the recognition of odors in the nose is translated into a map of odor quality in the brain. We first confirm previous studies that the first principal component could be related to pleasantness, however the next higher principal components are not directly clear. We then find mostly continuous spatial representations for perceptual categories. We compare the space spanned by spatial and population codes to human reports of perceptual similarity between odors and our results suggest that perceptual categories could be already embedded in glomerular activations and that spatial representations give a better match than population codes. This suggests that human and rat perceptual dimensions of odorant coding are related and indicates that perceptual qualities could be represented as continuous spatial codes of the olfactory bulb glomerulus population
publishDate 2011
dc.date.none.fl_str_mv 2011
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/138038
url https://hdl.handle.net/2445/138038
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.3389/fnsys.2011.00082
Frontiers in systems Neuroscience, 2011, vol. 5, num. 82, p. 1-8
https://doi.org/10.3389/fnsys.2011.00082
dc.rights.none.fl_str_mv cc-by (c) Auffarth, Benjamin et al., 2011
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Auffarth, Benjamin et al., 2011
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Frontiers Media
publisher.none.fl_str_mv Frontiers Media
dc.source.none.fl_str_mv Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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