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Facial thermal variations: A new marker of emotional arousal

Functional infrared thermal imaging (fITI) is considered a promising method to measure emotional autonomic responses through facial cutaneous thermal variations. However, the facial thermal response to emotions still needs to be investigated within the framework of the dimensional approach to emotio...

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Autores principales: Kosonogov, Vladimir, De Zorzi, Lucas, Honoré, Jacques, Martínez-Velázquez, Eduardo S., Nandrino, Jean-Louis, Martinez-Selva, José M., Sequeira, Henrique
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5603162/
https://www.ncbi.nlm.nih.gov/pubmed/28922392
http://dx.doi.org/10.1371/journal.pone.0183592
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author Kosonogov, Vladimir
De Zorzi, Lucas
Honoré, Jacques
Martínez-Velázquez, Eduardo S.
Nandrino, Jean-Louis
Martinez-Selva, José M.
Sequeira, Henrique
author_facet Kosonogov, Vladimir
De Zorzi, Lucas
Honoré, Jacques
Martínez-Velázquez, Eduardo S.
Nandrino, Jean-Louis
Martinez-Selva, José M.
Sequeira, Henrique
author_sort Kosonogov, Vladimir
collection PubMed
description Functional infrared thermal imaging (fITI) is considered a promising method to measure emotional autonomic responses through facial cutaneous thermal variations. However, the facial thermal response to emotions still needs to be investigated within the framework of the dimensional approach to emotions. The main aim of this study was to assess how the facial thermal variations index the emotional arousal and valence dimensions of visual stimuli. Twenty-four participants were presented with three groups of standardized emotional pictures (unpleasant, neutral and pleasant) from the International Affective Picture System. Facial temperature was recorded at the nose tip, an important region of interest for facial thermal variations, and compared to electrodermal responses, a robust index of emotional arousal. Both types of responses were also compared to subjective ratings of pictures. An emotional arousal effect was found on the amplitude and latency of thermal responses and on the amplitude and frequency of electrodermal responses. The participants showed greater thermal and dermal responses to emotional than to neutral pictures with no difference between pleasant and unpleasant ones. Thermal responses correlated and the dermal ones tended to correlate with subjective ratings. Finally, in the emotional conditions compared to the neutral one, the frequency of simultaneous thermal and dermal responses increased while both thermal or dermal isolated responses decreased. Overall, this study brings convergent arguments to consider fITI as a promising method reflecting the arousal dimension of emotional stimulation and, consequently, as a credible alternative to the classical recording of electrodermal activity. The present research provides an original way to unveil autonomic implication in emotional processes and opens new perspectives to measure them in touchless conditions.
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spelling pubmed-56031622017-09-22 Facial thermal variations: A new marker of emotional arousal Kosonogov, Vladimir De Zorzi, Lucas Honoré, Jacques Martínez-Velázquez, Eduardo S. Nandrino, Jean-Louis Martinez-Selva, José M. Sequeira, Henrique PLoS One Research Article Functional infrared thermal imaging (fITI) is considered a promising method to measure emotional autonomic responses through facial cutaneous thermal variations. However, the facial thermal response to emotions still needs to be investigated within the framework of the dimensional approach to emotions. The main aim of this study was to assess how the facial thermal variations index the emotional arousal and valence dimensions of visual stimuli. Twenty-four participants were presented with three groups of standardized emotional pictures (unpleasant, neutral and pleasant) from the International Affective Picture System. Facial temperature was recorded at the nose tip, an important region of interest for facial thermal variations, and compared to electrodermal responses, a robust index of emotional arousal. Both types of responses were also compared to subjective ratings of pictures. An emotional arousal effect was found on the amplitude and latency of thermal responses and on the amplitude and frequency of electrodermal responses. The participants showed greater thermal and dermal responses to emotional than to neutral pictures with no difference between pleasant and unpleasant ones. Thermal responses correlated and the dermal ones tended to correlate with subjective ratings. Finally, in the emotional conditions compared to the neutral one, the frequency of simultaneous thermal and dermal responses increased while both thermal or dermal isolated responses decreased. Overall, this study brings convergent arguments to consider fITI as a promising method reflecting the arousal dimension of emotional stimulation and, consequently, as a credible alternative to the classical recording of electrodermal activity. The present research provides an original way to unveil autonomic implication in emotional processes and opens new perspectives to measure them in touchless conditions. Public Library of Science 2017-09-18 /pmc/articles/PMC5603162/ /pubmed/28922392 http://dx.doi.org/10.1371/journal.pone.0183592 Text en © 2017 Kosonogov et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Kosonogov, Vladimir
De Zorzi, Lucas
Honoré, Jacques
Martínez-Velázquez, Eduardo S.
Nandrino, Jean-Louis
Martinez-Selva, José M.
Sequeira, Henrique
Facial thermal variations: A new marker of emotional arousal
title Facial thermal variations: A new marker of emotional arousal
title_full Facial thermal variations: A new marker of emotional arousal
title_fullStr Facial thermal variations: A new marker of emotional arousal
title_full_unstemmed Facial thermal variations: A new marker of emotional arousal
title_short Facial thermal variations: A new marker of emotional arousal
title_sort facial thermal variations: a new marker of emotional arousal
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5603162/
https://www.ncbi.nlm.nih.gov/pubmed/28922392
http://dx.doi.org/10.1371/journal.pone.0183592
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