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Statements

Subject Item
n2:RIV%2F67985823%3A_____%2F12%3A00386556%21RIV13-AV0-67985823
rdf:type
skos:Concept n5:Vysledek
dcterms:description
The sternocleidomastoid (SCM) muscle is one of the neck muscles responsible for head posture and control of head movement. It functions in rotation, inclination, rotraction, extension and flexion of the head, whilst chewing and in exerting ncreased respiratory efforts. This study is the first one describing the myosin heavy chain (MyHC) isoform composition of the SCM muscle of presumably healthy young males for the purpose of better understanding the contractile properties of the muscle as well as to help in evaluation of pathologically altered structure of the muscle. Autopsy samples were processed immunohistochemically to reveal the MyHC isoform composition. The muscle fibres expressed MyHC-1 (31.5%), -2a (29.7%) and -2x (4.3%) or co-expressed MyHC-2a with MyHC-2x (26.8%), MyHC-1 with MyHC-2a (4.1%) and/or MyHC-1, -2a with -2x (1.1%). In addition to the MyHC isoforms, characteristic of adult limb muscles, a very low percentage of muscle fibres (0.2–2.7%) expressed MyHC-neo, which is normally not found in adult limb muscles. Only two samples exhibited MyHC-neo at a rather higher percentage (6.3% and 7.5%) of muscle fibres. The high share of hybrid fibres and the presence of MyHC-neo in the SCM muscle differ from that of adult limb muscles where hybrid fibres are rare and the expression of immature MyHC isoforms occurs only in pathological or experimental conditions. Since the SCM muscle shares the same embryogenic potential as limb muscles, its distinct MyHC expression appears to be associated with twin innervation and with the intrinsic specialisation to perform multiple functions The sternocleidomastoid (SCM) muscle is one of the neck muscles responsible for head posture and control of head movement. It functions in rotation, inclination, rotraction, extension and flexion of the head, whilst chewing and in exerting ncreased respiratory efforts. This study is the first one describing the myosin heavy chain (MyHC) isoform composition of the SCM muscle of presumably healthy young males for the purpose of better understanding the contractile properties of the muscle as well as to help in evaluation of pathologically altered structure of the muscle. Autopsy samples were processed immunohistochemically to reveal the MyHC isoform composition. The muscle fibres expressed MyHC-1 (31.5%), -2a (29.7%) and -2x (4.3%) or co-expressed MyHC-2a with MyHC-2x (26.8%), MyHC-1 with MyHC-2a (4.1%) and/or MyHC-1, -2a with -2x (1.1%). In addition to the MyHC isoforms, characteristic of adult limb muscles, a very low percentage of muscle fibres (0.2–2.7%) expressed MyHC-neo, which is normally not found in adult limb muscles. Only two samples exhibited MyHC-neo at a rather higher percentage (6.3% and 7.5%) of muscle fibres. The high share of hybrid fibres and the presence of MyHC-neo in the SCM muscle differ from that of adult limb muscles where hybrid fibres are rare and the expression of immature MyHC isoforms occurs only in pathological or experimental conditions. Since the SCM muscle shares the same embryogenic potential as limb muscles, its distinct MyHC expression appears to be associated with twin innervation and with the intrinsic specialisation to perform multiple functions
dcterms:title
Myosin heavy chain composition of the human sternocleidomastoid muscle Myosin heavy chain composition of the human sternocleidomastoid muscle
skos:prefLabel
Myosin heavy chain composition of the human sternocleidomastoid muscle Myosin heavy chain composition of the human sternocleidomastoid muscle
skos:notation
RIV/67985823:_____/12:00386556!RIV13-AV0-67985823
n5:predkladatel
n12:ico%3A67985823
n3:aktivita
n13:P n13:Z
n3:aktivity
P(LC06063), P(MEB090910), Z(AV0Z50110509)
n3:cisloPeriodika
5
n3:dodaniDat
n11:2013
n3:domaciTvurceVysledku
n16:1413201
n3:druhVysledku
n14:J
n3:duvernostUdaju
n19:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
152626
n3:idVysledku
RIV/67985823:_____/12:00386556
n3:jazykVysledku
n9:eng
n3:klicovaSlova
immunohistochemistry; MyHC isoforms; muscle fibre types; sternocleidomastoid muscle
n3:klicoveSlovo
n10:sternocleidomastoid%20muscle n10:muscle%20fibre%20types n10:MyHC%20isoforms n10:immunohistochemistry
n3:kodStatuVydavatele
DE - Spolková republika Německo
n3:kontrolniKodProRIV
[A95397C1E4AA]
n3:nazevZdroje
Annals of Anatomy-Anatomischer Anzeiger
n3:obor
n15:FH
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
3
n3:projekt
n6:LC06063 n6:MEB090910
n3:rokUplatneniVysledku
n11:2012
n3:svazekPeriodika
194
n3:tvurceVysledku
Cvetko, E. Karen, Petr Eržen, I.
n3:wos
000310099300010
n3:zamer
n20:AV0Z50110509
s:issn
0940-9602
s:numberOfPages
6
n18:doi
10.1016/j.aanat.2012.05.001