Emotions alter muscle proprioceptive coding of movements in humans

Abstract Emotions can evoke strong reactions that have profound influences, from gross changes in our internal environment to small fluctuations in facial muscles, and reveal our feelings overtly. Muscles contain proprioceptive afferents, informing us about our movements and regulating motor activit...

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Autores principales:	Rochelle Ackerley, Jean-Marc Aimonetti, Edith Ribot-Ciscar
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d3718d2b823a45eab8c53a39c0b3599b
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spelling	oai:doaj.org-article:d3718d2b823a45eab8c53a39c0b3599b2021-12-02T15:05:08ZEmotions alter muscle proprioceptive coding of movements in humans10.1038/s41598-017-08721-42045-2322https://doaj.org/article/d3718d2b823a45eab8c53a39c0b3599b2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-08721-4https://doaj.org/toc/2045-2322Abstract Emotions can evoke strong reactions that have profound influences, from gross changes in our internal environment to small fluctuations in facial muscles, and reveal our feelings overtly. Muscles contain proprioceptive afferents, informing us about our movements and regulating motor activities. Their firing reflects changes in muscle length, yet their sensitivity can be modified by the fusimotor system, as found in animals. In humans, the sensitivity of muscle afferents is modulated by cognitive processes, such as attention; however, it is unknown if emotional processes can modulate muscle feedback. Presently, we explored whether muscle afferent sensitivity adapts to the emotional situation. We recorded from single muscle afferents in the leg, using microneurography, and moved the ankle joint of participants, while they listened to evocative classical music to induce sad, neutral, or happy emotions, or sat passively (no music). We further monitored their physiological responses using skin conductance, heart rate, and electromyography measures. We found that muscle afferent firing was modified by the emotional context, especially for sad emotions, where the muscle spindle dynamic response increased. We suggest that this allows us to prime movements, where the emotional state prepares the body for consequent behaviour-appropriate reactions.Rochelle AckerleyJean-Marc AimonettiEdith Ribot-CiscarNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Rochelle Ackerley Jean-Marc Aimonetti Edith Ribot-Ciscar Emotions alter muscle proprioceptive coding of movements in humans
description	Abstract Emotions can evoke strong reactions that have profound influences, from gross changes in our internal environment to small fluctuations in facial muscles, and reveal our feelings overtly. Muscles contain proprioceptive afferents, informing us about our movements and regulating motor activities. Their firing reflects changes in muscle length, yet their sensitivity can be modified by the fusimotor system, as found in animals. In humans, the sensitivity of muscle afferents is modulated by cognitive processes, such as attention; however, it is unknown if emotional processes can modulate muscle feedback. Presently, we explored whether muscle afferent sensitivity adapts to the emotional situation. We recorded from single muscle afferents in the leg, using microneurography, and moved the ankle joint of participants, while they listened to evocative classical music to induce sad, neutral, or happy emotions, or sat passively (no music). We further monitored their physiological responses using skin conductance, heart rate, and electromyography measures. We found that muscle afferent firing was modified by the emotional context, especially for sad emotions, where the muscle spindle dynamic response increased. We suggest that this allows us to prime movements, where the emotional state prepares the body for consequent behaviour-appropriate reactions.
format	article
author	Rochelle Ackerley Jean-Marc Aimonetti Edith Ribot-Ciscar
author_facet	Rochelle Ackerley Jean-Marc Aimonetti Edith Ribot-Ciscar
author_sort	Rochelle Ackerley
title	Emotions alter muscle proprioceptive coding of movements in humans
title_short	Emotions alter muscle proprioceptive coding of movements in humans
title_full	Emotions alter muscle proprioceptive coding of movements in humans
title_fullStr	Emotions alter muscle proprioceptive coding of movements in humans
title_full_unstemmed	Emotions alter muscle proprioceptive coding of movements in humans
title_sort	emotions alter muscle proprioceptive coding of movements in humans
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/d3718d2b823a45eab8c53a39c0b3599b
work_keys_str_mv	AT rochelleackerley emotionsaltermuscleproprioceptivecodingofmovementsinhumans AT jeanmarcaimonetti emotionsaltermuscleproprioceptivecodingofmovementsinhumans AT edithribotciscar emotionsaltermuscleproprioceptivecodingofmovementsinhumans
_version_	1718388924483633152

Emotions alter muscle proprioceptive coding of movements in humans

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