Skeletal Muscles with Antagonistic Muscular Actions: Morphological, Contractile and Metabolic Characteristics

The muscles can perform the same function in a specific segment (muscles of fast and slow contraction), and at the same time be antagonistic in relation to muscular action (flexors or extensors). The present research aimed to study the morphology, frequency and metabolism of fiber types and the cont...

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Autores principales:	de Freitas,Carlos Eduardo A, Freitas,Selma de Bastos Zambelli, Lopes,Francis da Silva, Pai-Silva,Maeli Dal, Piçarro,Ivan da Cruz
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2009
Materias:	Contractile ability Metabolic Morphologic Skeletal muscle
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000400034
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spelling	oai:scielo:S0717-950220090004000342010-05-18Skeletal Muscles with Antagonistic Muscular Actions: Morphological, Contractile and Metabolic Characteristicsde Freitas,Carlos Eduardo AFreitas,Selma de Bastos ZambelliLopes,Francis da SilvaPai-Silva,Maeli DalPiçarro,Ivan da Cruz Contractile ability Metabolic Morphologic Skeletal muscle The muscles can perform the same function in a specific segment (muscles of fast and slow contraction), and at the same time be antagonistic in relation to muscular action (flexors or extensors). The present research aimed to study the morphology, frequency and metabolism of fiber types and the contractile characteristics of extensor and flexors muscles of rabbit. We studied muscles anterior tibialis (AT), flexor digitorum supeficialis (FDS), extensor digitorum longus (EDL) and posterior tibialis (PT). The muscles were submitted to the techniques HE, NADH-TR and myofibrillar ATPase. In EDL and PT extensor muscles, the frequencies of red (SO + FOG) and white fibers (FG) were 68.77% and 31.23% versus 58.87% and 41.13%, respectively. In the AT and FDS flexor muscles, these frequencies were 75.14% and 24.86% versus 73.89% and 26.11%, respectively. In extensor muscles, the percentage of slow contraction fibers was 8.05% in EDL and 9.74% in PT, and in fast contraction, 91.95% in EDL and 90.26% in PT. In flexors, the slow contraction frequencies were 12.35% in AT and 8.17% in FDS, and in fast contraction, 87.65% and 91.83%, respectively. Skeletal muscles with antagonistic muscular actions (flexors and extensors) the morphological, contractile and metabolic characteristics are identical.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.27 n.4 20092009-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000400034en10.4067/S0717-95022009000400034
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Contractile ability Metabolic Morphologic Skeletal muscle
spellingShingle	Contractile ability Metabolic Morphologic Skeletal muscle de Freitas,Carlos Eduardo A Freitas,Selma de Bastos Zambelli Lopes,Francis da Silva Pai-Silva,Maeli Dal Piçarro,Ivan da Cruz Skeletal Muscles with Antagonistic Muscular Actions: Morphological, Contractile and Metabolic Characteristics
description	The muscles can perform the same function in a specific segment (muscles of fast and slow contraction), and at the same time be antagonistic in relation to muscular action (flexors or extensors). The present research aimed to study the morphology, frequency and metabolism of fiber types and the contractile characteristics of extensor and flexors muscles of rabbit. We studied muscles anterior tibialis (AT), flexor digitorum supeficialis (FDS), extensor digitorum longus (EDL) and posterior tibialis (PT). The muscles were submitted to the techniques HE, NADH-TR and myofibrillar ATPase. In EDL and PT extensor muscles, the frequencies of red (SO + FOG) and white fibers (FG) were 68.77% and 31.23% versus 58.87% and 41.13%, respectively. In the AT and FDS flexor muscles, these frequencies were 75.14% and 24.86% versus 73.89% and 26.11%, respectively. In extensor muscles, the percentage of slow contraction fibers was 8.05% in EDL and 9.74% in PT, and in fast contraction, 91.95% in EDL and 90.26% in PT. In flexors, the slow contraction frequencies were 12.35% in AT and 8.17% in FDS, and in fast contraction, 87.65% and 91.83%, respectively. Skeletal muscles with antagonistic muscular actions (flexors and extensors) the morphological, contractile and metabolic characteristics are identical.
author	de Freitas,Carlos Eduardo A Freitas,Selma de Bastos Zambelli Lopes,Francis da Silva Pai-Silva,Maeli Dal Piçarro,Ivan da Cruz
author_facet	de Freitas,Carlos Eduardo A Freitas,Selma de Bastos Zambelli Lopes,Francis da Silva Pai-Silva,Maeli Dal Piçarro,Ivan da Cruz
author_sort	de Freitas,Carlos Eduardo A
title	Skeletal Muscles with Antagonistic Muscular Actions: Morphological, Contractile and Metabolic Characteristics
title_short	Skeletal Muscles with Antagonistic Muscular Actions: Morphological, Contractile and Metabolic Characteristics
title_full	Skeletal Muscles with Antagonistic Muscular Actions: Morphological, Contractile and Metabolic Characteristics
title_fullStr	Skeletal Muscles with Antagonistic Muscular Actions: Morphological, Contractile and Metabolic Characteristics
title_full_unstemmed	Skeletal Muscles with Antagonistic Muscular Actions: Morphological, Contractile and Metabolic Characteristics
title_sort	skeletal muscles with antagonistic muscular actions: morphological, contractile and metabolic characteristics
publisher	Sociedad Chilena de Anatomía
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000400034
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Skeletal Muscles with Antagonistic Muscular Actions: Morphological, Contractile and Metabolic Characteristics

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