Electromyographic activation patterns during swallowing in older adults

Abstract Age-related weakness due to atrophy and fatty infiltration in oropharyngeal muscles may be related to dysphagia in older adults. However, little is known about changes in the oropharyngeal muscle activation pattern in older adults. This was a prospective and experimental study. Forty health...

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Autores principales:	Jin Young Ko, Hayoung Kim, Joonyoung Jang, Jun Chang Lee, Ju Seok Ryu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/eabe93879b1f4f87bd7aecf74673205c
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spelling	oai:doaj.org-article:eabe93879b1f4f87bd7aecf74673205c2021-12-02T13:33:52ZElectromyographic activation patterns during swallowing in older adults10.1038/s41598-021-84972-62045-2322https://doaj.org/article/eabe93879b1f4f87bd7aecf74673205c2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84972-6https://doaj.org/toc/2045-2322Abstract Age-related weakness due to atrophy and fatty infiltration in oropharyngeal muscles may be related to dysphagia in older adults. However, little is known about changes in the oropharyngeal muscle activation pattern in older adults. This was a prospective and experimental study. Forty healthy participants (20 older [> 60 years] and 20 young [< 60 years] adults) were enrolled. Six channel surface electrodes were placed over the bilateral suprahyoid (SH), bilateral retrohyoid (RH), thyrohyoid (TH), and sternothyroid (StH) muscles. Electromyography signals were then recorded twice for each patient during swallowing of 2 cc of water, 5 cc of water, and 5 cc of a highly viscous fluid. Latency, duration, and peak amplitude were measured. The activation patterns were the same, in the order of SH, TH, and StH, in both groups. The muscle activation patterns were classified as type I and II; the type I pattern was characterized by a monophasic shape, and the type II comprised a pre-reflex phase and a main phase. The oropharyngeal muscles and SH muscles were found to develop a pre-reflex phase specifically with increasing volume and viscosity of the swallowed fluid. Type I showed a different response to the highly viscous fluid in the older group compared to that in the younger group. However, type II showed concordant changes in the groups. Therefore, healthy older people were found to compensate for swallowing with a pre-reflex phase of muscle activation in response to increased liquid volume and viscosity, to adjust for age-related muscle weakness.Jin Young KoHayoung KimJoonyoung JangJun Chang LeeJu Seok RyuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jin Young Ko Hayoung Kim Joonyoung Jang Jun Chang Lee Ju Seok Ryu Electromyographic activation patterns during swallowing in older adults
description	Abstract Age-related weakness due to atrophy and fatty infiltration in oropharyngeal muscles may be related to dysphagia in older adults. However, little is known about changes in the oropharyngeal muscle activation pattern in older adults. This was a prospective and experimental study. Forty healthy participants (20 older [> 60 years] and 20 young [< 60 years] adults) were enrolled. Six channel surface electrodes were placed over the bilateral suprahyoid (SH), bilateral retrohyoid (RH), thyrohyoid (TH), and sternothyroid (StH) muscles. Electromyography signals were then recorded twice for each patient during swallowing of 2 cc of water, 5 cc of water, and 5 cc of a highly viscous fluid. Latency, duration, and peak amplitude were measured. The activation patterns were the same, in the order of SH, TH, and StH, in both groups. The muscle activation patterns were classified as type I and II; the type I pattern was characterized by a monophasic shape, and the type II comprised a pre-reflex phase and a main phase. The oropharyngeal muscles and SH muscles were found to develop a pre-reflex phase specifically with increasing volume and viscosity of the swallowed fluid. Type I showed a different response to the highly viscous fluid in the older group compared to that in the younger group. However, type II showed concordant changes in the groups. Therefore, healthy older people were found to compensate for swallowing with a pre-reflex phase of muscle activation in response to increased liquid volume and viscosity, to adjust for age-related muscle weakness.
format	article
author	Jin Young Ko Hayoung Kim Joonyoung Jang Jun Chang Lee Ju Seok Ryu
author_facet	Jin Young Ko Hayoung Kim Joonyoung Jang Jun Chang Lee Ju Seok Ryu
author_sort	Jin Young Ko
title	Electromyographic activation patterns during swallowing in older adults
title_short	Electromyographic activation patterns during swallowing in older adults
title_full	Electromyographic activation patterns during swallowing in older adults
title_fullStr	Electromyographic activation patterns during swallowing in older adults
title_full_unstemmed	Electromyographic activation patterns during swallowing in older adults
title_sort	electromyographic activation patterns during swallowing in older adults
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/eabe93879b1f4f87bd7aecf74673205c
work_keys_str_mv	AT jinyoungko electromyographicactivationpatternsduringswallowinginolderadults AT hayoungkim electromyographicactivationpatternsduringswallowinginolderadults AT joonyoungjang electromyographicactivationpatternsduringswallowinginolderadults AT junchanglee electromyographicactivationpatternsduringswallowinginolderadults AT juseokryu electromyographicactivationpatternsduringswallowinginolderadults
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Electromyographic activation patterns during swallowing in older adults

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