Morphological Analysis of Articularis Genus and Involvement in Muscle Synchronicity with Vastus Intermedius

SUMMARY: The articularis genus, which lies under the vastus intermedius, has been regarded as part of the quadriceps femoris. However, they are well known to have different function because their respective origins and insertions are mutually distinct. These muscles are considered to work almost sim...

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Autores principales:	Kobayashi,Hiroto, Takano,Yuta, Yuri,Takuma, Yoshida,Saori, Suzuki,Katsuhiko, Kiyoshige,Yoshiro, Naito,Akira
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2018
Materias:	Articularis genus Vastus intermedius Muscle fiber type Cadaver Immunohistochemistry
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022018000300859
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spelling	oai:scielo:S0717-950220180003008592019-09-16Morphological Analysis of Articularis Genus and Involvement in Muscle Synchronicity with Vastus IntermediusKobayashi,HirotoTakano,YutaYuri,TakumaYoshida,SaoriSuzuki,KatsuhikoKiyoshige,YoshiroNaito,Akira Articularis genus Vastus intermedius Muscle fiber type Cadaver Immunohistochemistry SUMMARY: The articularis genus, which lies under the vastus intermedius, has been regarded as part of the quadriceps femoris. However, they are well known to have different function because their respective origins and insertions are mutually distinct. These muscles are considered to work almost simultaneously when the knee is extended. The electromyogram has been used to demonstrate muscle co-contraction. However, the articularis genus is deeper than other muscles. Moreover, it is difficult to analyze it by surface electromyogram. The relative proportions of muscle fiber types and the characteristics of these fiber types are important determinants of the surface electromyogram. Furthermore, biomechanical analysis of AG has remained unclear. This study investigated the ratio of muscle fiber types in these muscles. Muscle samples from seven human cadaveric specimens were used with application of immunofluorescence double staining. Results show that in the vastus intermedius and articularis genus, the percentage of Type I fibers was significantly higher than that of Type II fibers. No significant difference was found in the mean percentages of Type I and Type II fiber types. The percentages of Type I and Type II fibers in articularis genus muscle were correlated positively to the percentage in the vastus intermedius. These results suggest that similar muscle fiber compositions of these muscles might reflect their contraction during the same active phase of knee extension, despite their different functions.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.36 n.3 20182018-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022018000300859en10.4067/S0717-95022018000300859
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Articularis genus Vastus intermedius Muscle fiber type Cadaver Immunohistochemistry
spellingShingle	Articularis genus Vastus intermedius Muscle fiber type Cadaver Immunohistochemistry Kobayashi,Hiroto Takano,Yuta Yuri,Takuma Yoshida,Saori Suzuki,Katsuhiko Kiyoshige,Yoshiro Naito,Akira Morphological Analysis of Articularis Genus and Involvement in Muscle Synchronicity with Vastus Intermedius
description	SUMMARY: The articularis genus, which lies under the vastus intermedius, has been regarded as part of the quadriceps femoris. However, they are well known to have different function because their respective origins and insertions are mutually distinct. These muscles are considered to work almost simultaneously when the knee is extended. The electromyogram has been used to demonstrate muscle co-contraction. However, the articularis genus is deeper than other muscles. Moreover, it is difficult to analyze it by surface electromyogram. The relative proportions of muscle fiber types and the characteristics of these fiber types are important determinants of the surface electromyogram. Furthermore, biomechanical analysis of AG has remained unclear. This study investigated the ratio of muscle fiber types in these muscles. Muscle samples from seven human cadaveric specimens were used with application of immunofluorescence double staining. Results show that in the vastus intermedius and articularis genus, the percentage of Type I fibers was significantly higher than that of Type II fibers. No significant difference was found in the mean percentages of Type I and Type II fiber types. The percentages of Type I and Type II fibers in articularis genus muscle were correlated positively to the percentage in the vastus intermedius. These results suggest that similar muscle fiber compositions of these muscles might reflect their contraction during the same active phase of knee extension, despite their different functions.
author	Kobayashi,Hiroto Takano,Yuta Yuri,Takuma Yoshida,Saori Suzuki,Katsuhiko Kiyoshige,Yoshiro Naito,Akira
author_facet	Kobayashi,Hiroto Takano,Yuta Yuri,Takuma Yoshida,Saori Suzuki,Katsuhiko Kiyoshige,Yoshiro Naito,Akira
author_sort	Kobayashi,Hiroto
title	Morphological Analysis of Articularis Genus and Involvement in Muscle Synchronicity with Vastus Intermedius
title_short	Morphological Analysis of Articularis Genus and Involvement in Muscle Synchronicity with Vastus Intermedius
title_full	Morphological Analysis of Articularis Genus and Involvement in Muscle Synchronicity with Vastus Intermedius
title_fullStr	Morphological Analysis of Articularis Genus and Involvement in Muscle Synchronicity with Vastus Intermedius
title_full_unstemmed	Morphological Analysis of Articularis Genus and Involvement in Muscle Synchronicity with Vastus Intermedius
title_sort	morphological analysis of articularis genus and involvement in muscle synchronicity with vastus intermedius
publisher	Sociedad Chilena de Anatomía
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022018000300859
work_keys_str_mv	AT kobayashihiroto morphologicalanalysisofarticularisgenusandinvolvementinmusclesynchronicitywithvastusintermedius AT takanoyuta morphologicalanalysisofarticularisgenusandinvolvementinmusclesynchronicitywithvastusintermedius AT yuritakuma morphologicalanalysisofarticularisgenusandinvolvementinmusclesynchronicitywithvastusintermedius AT yoshidasaori morphologicalanalysisofarticularisgenusandinvolvementinmusclesynchronicitywithvastusintermedius AT suzukikatsuhiko morphologicalanalysisofarticularisgenusandinvolvementinmusclesynchronicitywithvastusintermedius AT kiyoshigeyoshiro morphologicalanalysisofarticularisgenusandinvolvementinmusclesynchronicitywithvastusintermedius AT naitoakira morphologicalanalysisofarticularisgenusandinvolvementinmusclesynchronicitywithvastusintermedius
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Morphological Analysis of Articularis Genus and Involvement in Muscle Synchronicity with Vastus Intermedius

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