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Effect of hypnotic suggestion on knee extensor neuromuscular properties in resting and fatigued states
PURPOSE: The aim of this study was to investigate whether hypnotic suggestions can alter knee extensor neuromuscular function at rest and during exercise. METHODS: Thirteen healthy volunteers (8 men and 5 women, 27 ± 3 years old) took part in this counterbalanced, crossover study including two exper...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5912755/ https://www.ncbi.nlm.nih.gov/pubmed/29684047 http://dx.doi.org/10.1371/journal.pone.0195437 |
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author | Dittrich, Naiandra Agostino, Daniel Antonini Philippe, Roberta Guglielmo, Luiz Guilherme A. Place, Nicolas |
author_facet | Dittrich, Naiandra Agostino, Daniel Antonini Philippe, Roberta Guglielmo, Luiz Guilherme A. Place, Nicolas |
author_sort | Dittrich, Naiandra |
collection | PubMed |
description | PURPOSE: The aim of this study was to investigate whether hypnotic suggestions can alter knee extensor neuromuscular function at rest and during exercise. METHODS: Thirteen healthy volunteers (8 men and 5 women, 27 ± 3 years old) took part in this counterbalanced, crossover study including two experimental (hypnosis and control) sessions. Knee extensor neuromuscular function was tested before and after hypnosis suggestion by using a combination of voluntary contraction, transcutaneous femoral nerve electrical stimulation and transcranial magnetic stimulation (TMS). A fatiguing exercise (sustained submaximal contraction at 20% maximal voluntary contraction (MVC) force) was also performed to evaluate the potential influence of hypnosis on the extent and origin of neuromuscular adjustments. RESULTS: Hypnosis did not (p>0.05) alter MVC force or knee extensor neural properties. Corticospinal excitability, assessed with the amplitude of knee extensor motor evoked potentials, was also unchanged (p>0.05), as was the level of intracortical inhibition assessed with paired pulse TMS (short-interval intracortical inhibition, SICI). Time to task failure (~300 s) was not different (p>0.05) between the two sessions; accordingly, hypnosis did not influence neuromuscular adjustments measured during exercise and at task failure (p>0.05). CONCLUSION: Hypnotic suggestions did not alter neuromuscular properties of the knee extensor muscles under resting condition or during/after exercise, suggesting that hypnosis-induced improvement in exercise performance and enhanced corticospinal excitability might be limited to highly susceptible participants. |
format | Online Article Text |
id | pubmed-5912755 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-59127552018-05-05 Effect of hypnotic suggestion on knee extensor neuromuscular properties in resting and fatigued states Dittrich, Naiandra Agostino, Daniel Antonini Philippe, Roberta Guglielmo, Luiz Guilherme A. Place, Nicolas PLoS One Research Article PURPOSE: The aim of this study was to investigate whether hypnotic suggestions can alter knee extensor neuromuscular function at rest and during exercise. METHODS: Thirteen healthy volunteers (8 men and 5 women, 27 ± 3 years old) took part in this counterbalanced, crossover study including two experimental (hypnosis and control) sessions. Knee extensor neuromuscular function was tested before and after hypnosis suggestion by using a combination of voluntary contraction, transcutaneous femoral nerve electrical stimulation and transcranial magnetic stimulation (TMS). A fatiguing exercise (sustained submaximal contraction at 20% maximal voluntary contraction (MVC) force) was also performed to evaluate the potential influence of hypnosis on the extent and origin of neuromuscular adjustments. RESULTS: Hypnosis did not (p>0.05) alter MVC force or knee extensor neural properties. Corticospinal excitability, assessed with the amplitude of knee extensor motor evoked potentials, was also unchanged (p>0.05), as was the level of intracortical inhibition assessed with paired pulse TMS (short-interval intracortical inhibition, SICI). Time to task failure (~300 s) was not different (p>0.05) between the two sessions; accordingly, hypnosis did not influence neuromuscular adjustments measured during exercise and at task failure (p>0.05). CONCLUSION: Hypnotic suggestions did not alter neuromuscular properties of the knee extensor muscles under resting condition or during/after exercise, suggesting that hypnosis-induced improvement in exercise performance and enhanced corticospinal excitability might be limited to highly susceptible participants. Public Library of Science 2018-04-23 /pmc/articles/PMC5912755/ /pubmed/29684047 http://dx.doi.org/10.1371/journal.pone.0195437 Text en © 2018 Dittrich 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 Dittrich, Naiandra Agostino, Daniel Antonini Philippe, Roberta Guglielmo, Luiz Guilherme A. Place, Nicolas Effect of hypnotic suggestion on knee extensor neuromuscular properties in resting and fatigued states |
title | Effect of hypnotic suggestion on knee extensor neuromuscular properties in resting and fatigued states |
title_full | Effect of hypnotic suggestion on knee extensor neuromuscular properties in resting and fatigued states |
title_fullStr | Effect of hypnotic suggestion on knee extensor neuromuscular properties in resting and fatigued states |
title_full_unstemmed | Effect of hypnotic suggestion on knee extensor neuromuscular properties in resting and fatigued states |
title_short | Effect of hypnotic suggestion on knee extensor neuromuscular properties in resting and fatigued states |
title_sort | effect of hypnotic suggestion on knee extensor neuromuscular properties in resting and fatigued states |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5912755/ https://www.ncbi.nlm.nih.gov/pubmed/29684047 http://dx.doi.org/10.1371/journal.pone.0195437 |
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