Muscle Fiber Type Composition, Fiber Diameter, Capillary Density in Temporalis and Masseter Muscles and Correlation with Bite Force

The jaw muscles are essential components in the stomatognatic system. Their complex architecture allows them to execute several motor tasks. One of the structural peculiarities is the presence of hybrid and neonatal fibers.We studied the differences of the fiber-type in masseter and temporalis muscl...

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Autores principales:	Guimarães,Thatiana Bastos, Ferreira,Mariana Brandão, Wakamatsu,Alda, Oliveira,Stanley Reis, Guimarães,Antonio Sergio, Suazo Galdames,Iván, Marie,Suely Nagahashi
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2013
Materias:	Masseter temporalis Muscle fiber type Capillary density Bite force
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000200064
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spelling	oai:scielo:S0717-950220130002000642014-09-09Muscle Fiber Type Composition, Fiber Diameter, Capillary Density in Temporalis and Masseter Muscles and Correlation with Bite ForceGuimarães,Thatiana BastosFerreira,Mariana BrandãoWakamatsu,AldaOliveira,Stanley ReisGuimarães,Antonio SergioSuazo Galdames,IvánMarie,Suely Nagahashi Masseter temporalis Muscle fiber type Capillary density Bite force The jaw muscles are essential components in the stomatognatic system. Their complex architecture allows them to execute several motor tasks. One of the structural peculiarities is the presence of hybrid and neonatal fibers.We studied the differences of the fiber-type in masseter and temporalis muscles along the first to nineth decades in both genders. Seventy-four (74) samples were analyzed by immunohistochemistry. Slow and fast muscle fibers distribution was similar in both muscles in both genders. Hybrid fiber was observed in all decades, and its frequency decreased significantly (p<0.001) with aging in masseter. Neonatal myosin expression was observed in all decades, its expression was more frequent in masseter (p=0.01), and males in temporalis (p=0.025). Decrease of the cross sectional area of fast and slow fibers, and decrease of capillary density were detected with aging. These morpho-immunohistochemical alterations on masseter and temporalis muscles correlated to the decrease in bite force with aging.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.31 n.2 20132013-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000200064en10.4067/S0717-95022013000200064
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Masseter temporalis Muscle fiber type Capillary density Bite force
spellingShingle	Masseter temporalis Muscle fiber type Capillary density Bite force Guimarães,Thatiana Bastos Ferreira,Mariana Brandão Wakamatsu,Alda Oliveira,Stanley Reis Guimarães,Antonio Sergio Suazo Galdames,Iván Marie,Suely Nagahashi Muscle Fiber Type Composition, Fiber Diameter, Capillary Density in Temporalis and Masseter Muscles and Correlation with Bite Force
description	The jaw muscles are essential components in the stomatognatic system. Their complex architecture allows them to execute several motor tasks. One of the structural peculiarities is the presence of hybrid and neonatal fibers.We studied the differences of the fiber-type in masseter and temporalis muscles along the first to nineth decades in both genders. Seventy-four (74) samples were analyzed by immunohistochemistry. Slow and fast muscle fibers distribution was similar in both muscles in both genders. Hybrid fiber was observed in all decades, and its frequency decreased significantly (p<0.001) with aging in masseter. Neonatal myosin expression was observed in all decades, its expression was more frequent in masseter (p=0.01), and males in temporalis (p=0.025). Decrease of the cross sectional area of fast and slow fibers, and decrease of capillary density were detected with aging. These morpho-immunohistochemical alterations on masseter and temporalis muscles correlated to the decrease in bite force with aging.
author	Guimarães,Thatiana Bastos Ferreira,Mariana Brandão Wakamatsu,Alda Oliveira,Stanley Reis Guimarães,Antonio Sergio Suazo Galdames,Iván Marie,Suely Nagahashi
author_facet	Guimarães,Thatiana Bastos Ferreira,Mariana Brandão Wakamatsu,Alda Oliveira,Stanley Reis Guimarães,Antonio Sergio Suazo Galdames,Iván Marie,Suely Nagahashi
author_sort	Guimarães,Thatiana Bastos
title	Muscle Fiber Type Composition, Fiber Diameter, Capillary Density in Temporalis and Masseter Muscles and Correlation with Bite Force
title_short	Muscle Fiber Type Composition, Fiber Diameter, Capillary Density in Temporalis and Masseter Muscles and Correlation with Bite Force
title_full	Muscle Fiber Type Composition, Fiber Diameter, Capillary Density in Temporalis and Masseter Muscles and Correlation with Bite Force
title_fullStr	Muscle Fiber Type Composition, Fiber Diameter, Capillary Density in Temporalis and Masseter Muscles and Correlation with Bite Force
title_full_unstemmed	Muscle Fiber Type Composition, Fiber Diameter, Capillary Density in Temporalis and Masseter Muscles and Correlation with Bite Force
title_sort	muscle fiber type composition, fiber diameter, capillary density in temporalis and masseter muscles and correlation with bite force
publisher	Sociedad Chilena de Anatomía
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000200064
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Muscle Fiber Type Composition, Fiber Diameter, Capillary Density in Temporalis and Masseter Muscles and Correlation with Bite Force

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