Cortical response to subjectively unconscious danger

Cortical involvement in the evolution-favored automatic reaction to danger was studied. Electrical neural activity was recorded from 31 subjects, reporting fear of spiders, at 60 scalp locations. Visual stimuli containing spiders (negative elements) or, alternatively, nonnegative elements were prese...

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Detalhes bibliográficos
Autores: Carretié, Luis, Hinojosa, José Antonio, Mercado, Francisco, Tapia, Manuel
Formato: artículo
Fecha de publicación:2005
País:España
Recursos:Universidad Rey Juan Carlos
Repositorio:BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
OAI Identifier:oai:burjcdigital.urjc.es:10115/3085
Acesso em linha:http://hdl.handle.net/10115/3085
Access Level:acceso abierto
Palavra-chave:Aeronáutica
3205.07 Neurología
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spelling Cortical response to subjectively unconscious dangerCarretié, LuisHinojosa, José AntonioMercado, FranciscoTapia, ManuelAeronáutica3205.07 NeurologíaCortical involvement in the evolution-favored automatic reaction to danger was studied. Electrical neural activity was recorded from 31 subjects, reporting fear of spiders, at 60 scalp locations. Visual stimuli containing spiders (negative elements) or, alternatively, nonnegative elements were presented to subjects, though they were unaware of their presence: a concurrent visual detection task using consciously perceived targets was administered. Spatial and temporal principal component analyses were employed to define and quantify, in a reliable manner, the main components of the neuroelectrical response to unconscious stimuli, and a source localization algorithm provided information on their neural origin. Results indicated that around 150 ms after stimulus onset,ventromedial prefrontal areas previously reported as responding rapidly to danger-related (conscious) stimuli were activated by unconsciously perceived spiders more markedly than by nonnegative unconscious stimuli. Subsequently, around 500 ms after stimulus onset, activation of the posterior cingulate and visual association cortices increased in this same direction. These data support previous results indicating that the ventromedial prefrontal cortex is involved in the topdown regulation of attention (through its capability to modulate the activity of posterior cortices in charge of visual processing) and that it automatically facilitates danger processing.PsicologíaNeuroimage201020102005info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10115/3085reponame:BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlosinstname:Universidad Rey Juan CarlosInglésinfo:eu-repo/semantics/openAccessoai:burjcdigital.urjc.es:10115/30852026-06-24T12:48:17Z
dc.title.none.fl_str_mv Cortical response to subjectively unconscious danger
title Cortical response to subjectively unconscious danger
spellingShingle Cortical response to subjectively unconscious danger
Carretié, Luis
Aeronáutica
3205.07 Neurología
title_short Cortical response to subjectively unconscious danger
title_full Cortical response to subjectively unconscious danger
title_fullStr Cortical response to subjectively unconscious danger
title_full_unstemmed Cortical response to subjectively unconscious danger
title_sort Cortical response to subjectively unconscious danger
dc.creator.none.fl_str_mv Carretié, Luis
Hinojosa, José Antonio
Mercado, Francisco
Tapia, Manuel
author Carretié, Luis
author_facet Carretié, Luis
Hinojosa, José Antonio
Mercado, Francisco
Tapia, Manuel
author_role author
author2 Hinojosa, José Antonio
Mercado, Francisco
Tapia, Manuel
author2_role author
author
author
dc.subject.none.fl_str_mv Aeronáutica
3205.07 Neurología
topic Aeronáutica
3205.07 Neurología
description Cortical involvement in the evolution-favored automatic reaction to danger was studied. Electrical neural activity was recorded from 31 subjects, reporting fear of spiders, at 60 scalp locations. Visual stimuli containing spiders (negative elements) or, alternatively, nonnegative elements were presented to subjects, though they were unaware of their presence: a concurrent visual detection task using consciously perceived targets was administered. Spatial and temporal principal component analyses were employed to define and quantify, in a reliable manner, the main components of the neuroelectrical response to unconscious stimuli, and a source localization algorithm provided information on their neural origin. Results indicated that around 150 ms after stimulus onset,ventromedial prefrontal areas previously reported as responding rapidly to danger-related (conscious) stimuli were activated by unconsciously perceived spiders more markedly than by nonnegative unconscious stimuli. Subsequently, around 500 ms after stimulus onset, activation of the posterior cingulate and visual association cortices increased in this same direction. These data support previous results indicating that the ventromedial prefrontal cortex is involved in the topdown regulation of attention (through its capability to modulate the activity of posterior cortices in charge of visual processing) and that it automatically facilitates danger processing.
publishDate 2005
dc.date.none.fl_str_mv 2005
2010
2010
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10115/3085
url http://hdl.handle.net/10115/3085
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Neuroimage
publisher.none.fl_str_mv Neuroimage
dc.source.none.fl_str_mv reponame:BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
instname:Universidad Rey Juan Carlos
instname_str Universidad Rey Juan Carlos
reponame_str BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
collection BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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