Corticospinal Excitability Preceding the Grasping of Emotion-Laden Stimuli

Evolutionary theories posit that emotions prime organisms for action. This study examined whether corticospinal excitability (CSE) is modulated by the emotional valence of a to-be-grasped stimulus. CSE was estimated based on the amplitude of motor evoked potentials (MEPs) elicited using transcranial...

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Main Authors:	Nogueira-Campos, Anaelli Aparecida, de Oliveira, Laura Alice Santos, Della-Maggiore, Valeria, Esteves, Paula Oliveira, Rodrigues, Erika de Carvalho, D. Vargas, Claudia
Format:	Online
Language:	English
Published:	Public Library of Science 2014
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3986344/

id	pubmed-3986344
recordtype	oai_dc
spelling	pubmed-39863442014-04-15 Corticospinal Excitability Preceding the Grasping of Emotion-Laden Stimuli Nogueira-Campos, Anaelli Aparecida de Oliveira, Laura Alice Santos Della-Maggiore, Valeria Esteves, Paula Oliveira Rodrigues, Erika de Carvalho D. Vargas, Claudia Research Article Evolutionary theories posit that emotions prime organisms for action. This study examined whether corticospinal excitability (CSE) is modulated by the emotional valence of a to-be-grasped stimulus. CSE was estimated based on the amplitude of motor evoked potentials (MEPs) elicited using transcranial magnetic stimulation (TMS) and recorded on the first dorsal interosseous (FDI) muscle. Participants were instructed to grasp (ACTION condition) or just look at (NO-ACTION condition) unpleasant, pleasant and neutral stimuli. TMS pulses were applied randomly at 500 or 250 ms before a go signal. MEP amplitudes were normalized within condition by computing a ratio for the emotion-laden stimuli by reference to the neutral stimuli. A divergent valence effect was observed in the ACTION condition, where the CSE ratio was higher during the preparation to grasp unpleasant compared to pleasant stimuli. In addition, the CSE ratio was lower for pleasant stimuli during the ACTION condition compared to the NO-ACTION condition. Altogether, these results indicate that motor preparation is selectively modulated by the valence of the stimulus to be grasped. The lower CSE for pleasant stimuli may result from the need to refrain from executing an imminent action. Public Library of Science 2014-04-14 /pmc/articles/PMC3986344/ /pubmed/24732961 http://dx.doi.org/10.1371/journal.pone.0094824 Text en © 2014 Nogueira-Campos 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, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Nogueira-Campos, Anaelli Aparecida de Oliveira, Laura Alice Santos Della-Maggiore, Valeria Esteves, Paula Oliveira Rodrigues, Erika de Carvalho D. Vargas, Claudia
spellingShingle	Nogueira-Campos, Anaelli Aparecida de Oliveira, Laura Alice Santos Della-Maggiore, Valeria Esteves, Paula Oliveira Rodrigues, Erika de Carvalho D. Vargas, Claudia Corticospinal Excitability Preceding the Grasping of Emotion-Laden Stimuli
author_facet	Nogueira-Campos, Anaelli Aparecida de Oliveira, Laura Alice Santos Della-Maggiore, Valeria Esteves, Paula Oliveira Rodrigues, Erika de Carvalho D. Vargas, Claudia
author_sort	Nogueira-Campos, Anaelli Aparecida
title	Corticospinal Excitability Preceding the Grasping of Emotion-Laden Stimuli
title_short	Corticospinal Excitability Preceding the Grasping of Emotion-Laden Stimuli
title_full	Corticospinal Excitability Preceding the Grasping of Emotion-Laden Stimuli
title_fullStr	Corticospinal Excitability Preceding the Grasping of Emotion-Laden Stimuli
title_full_unstemmed	Corticospinal Excitability Preceding the Grasping of Emotion-Laden Stimuli
title_sort	corticospinal excitability preceding the grasping of emotion-laden stimuli
description	Evolutionary theories posit that emotions prime organisms for action. This study examined whether corticospinal excitability (CSE) is modulated by the emotional valence of a to-be-grasped stimulus. CSE was estimated based on the amplitude of motor evoked potentials (MEPs) elicited using transcranial magnetic stimulation (TMS) and recorded on the first dorsal interosseous (FDI) muscle. Participants were instructed to grasp (ACTION condition) or just look at (NO-ACTION condition) unpleasant, pleasant and neutral stimuli. TMS pulses were applied randomly at 500 or 250 ms before a go signal. MEP amplitudes were normalized within condition by computing a ratio for the emotion-laden stimuli by reference to the neutral stimuli. A divergent valence effect was observed in the ACTION condition, where the CSE ratio was higher during the preparation to grasp unpleasant compared to pleasant stimuli. In addition, the CSE ratio was lower for pleasant stimuli during the ACTION condition compared to the NO-ACTION condition. Altogether, these results indicate that motor preparation is selectively modulated by the valence of the stimulus to be grasped. The lower CSE for pleasant stimuli may result from the need to refrain from executing an imminent action.
publisher	Public Library of Science
publishDate	2014
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3986344/
_version_	1612077933327810560

Corticospinal Excitability Preceding the Grasping of Emotion-Laden Stimuli

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