Effects of low occlusal loading on the neuromuscular behavioral development of cortically-elicited jaw movements in growing rats

Abstract The effect of altered occlusal force on masticatory-related neuromuscular control, which projects from the anterior part of the cortical masticatory area (A-CMA), during growth remains unclear. This study sought to evaluate the effect of occlusal hypofunction on neuromuscular development of...

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Autores principales:	Phyo Thura Aung, Chiho Kato, Akiyo Fujita, Yasunori Abe, Takuya Ogawa, Hideyuki Ishidori, Hidemasa Okihara, Satoshi Kokai, Takashi Ono
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/243ae29ca2464717b43dd043a45ed341
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spelling	oai:doaj.org-article:243ae29ca2464717b43dd043a45ed3412021-12-02T13:26:37ZEffects of low occlusal loading on the neuromuscular behavioral development of cortically-elicited jaw movements in growing rats10.1038/s41598-021-86581-92045-2322https://doaj.org/article/243ae29ca2464717b43dd043a45ed3412021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86581-9https://doaj.org/toc/2045-2322Abstract The effect of altered occlusal force on masticatory-related neuromuscular control, which projects from the anterior part of the cortical masticatory area (A-CMA), during growth remains unclear. This study sought to evaluate the effect of occlusal hypofunction on neuromuscular development of jaw muscle activities and cortically-induced rhythmic jaw movements (RJMs) in growing rats. Sixty-four 2-week-old male albino Wistar rats were divided into the control (fed normal diet) and experimental (fed soft diet) groups soon after weaning. Electromyographic activity was recorded at 5, 7, 9, and 11 weeks from the right masseter and anterior digastric along with RJMs. We found a significantly longer onset latency and smaller peak-to-peak amplitude in the experimental group than that in the control group. The RJMs showed an increase in gape size and lateral excursion until up to 9 weeks in both groups. However, both the average gape size and lateral excursion were significantly smaller in the experimental group than that in the control group after 9 weeks. The jaw movement pattern also showed a significant decrease at the maximum opening period in the experimental group. Our findings indicate that inadequate occlusal function during growth alters neuromuscular control of masticatory behaviors and impairs the pattern of RJMs.Phyo Thura AungChiho KatoAkiyo FujitaYasunori AbeTakuya OgawaHideyuki IshidoriHidemasa OkiharaSatoshi KokaiTakashi OnoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Phyo Thura Aung Chiho Kato Akiyo Fujita Yasunori Abe Takuya Ogawa Hideyuki Ishidori Hidemasa Okihara Satoshi Kokai Takashi Ono Effects of low occlusal loading on the neuromuscular behavioral development of cortically-elicited jaw movements in growing rats
description	Abstract The effect of altered occlusal force on masticatory-related neuromuscular control, which projects from the anterior part of the cortical masticatory area (A-CMA), during growth remains unclear. This study sought to evaluate the effect of occlusal hypofunction on neuromuscular development of jaw muscle activities and cortically-induced rhythmic jaw movements (RJMs) in growing rats. Sixty-four 2-week-old male albino Wistar rats were divided into the control (fed normal diet) and experimental (fed soft diet) groups soon after weaning. Electromyographic activity was recorded at 5, 7, 9, and 11 weeks from the right masseter and anterior digastric along with RJMs. We found a significantly longer onset latency and smaller peak-to-peak amplitude in the experimental group than that in the control group. The RJMs showed an increase in gape size and lateral excursion until up to 9 weeks in both groups. However, both the average gape size and lateral excursion were significantly smaller in the experimental group than that in the control group after 9 weeks. The jaw movement pattern also showed a significant decrease at the maximum opening period in the experimental group. Our findings indicate that inadequate occlusal function during growth alters neuromuscular control of masticatory behaviors and impairs the pattern of RJMs.
format	article
author	Phyo Thura Aung Chiho Kato Akiyo Fujita Yasunori Abe Takuya Ogawa Hideyuki Ishidori Hidemasa Okihara Satoshi Kokai Takashi Ono
author_facet	Phyo Thura Aung Chiho Kato Akiyo Fujita Yasunori Abe Takuya Ogawa Hideyuki Ishidori Hidemasa Okihara Satoshi Kokai Takashi Ono
author_sort	Phyo Thura Aung
title	Effects of low occlusal loading on the neuromuscular behavioral development of cortically-elicited jaw movements in growing rats
title_short	Effects of low occlusal loading on the neuromuscular behavioral development of cortically-elicited jaw movements in growing rats
title_full	Effects of low occlusal loading on the neuromuscular behavioral development of cortically-elicited jaw movements in growing rats
title_fullStr	Effects of low occlusal loading on the neuromuscular behavioral development of cortically-elicited jaw movements in growing rats
title_full_unstemmed	Effects of low occlusal loading on the neuromuscular behavioral development of cortically-elicited jaw movements in growing rats
title_sort	effects of low occlusal loading on the neuromuscular behavioral development of cortically-elicited jaw movements in growing rats
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/243ae29ca2464717b43dd043a45ed341
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Effects of low occlusal loading on the neuromuscular behavioral development of cortically-elicited jaw movements in growing rats

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