Muscle shear elastic modulus is linearly related to muscle torque over the entire range of isometric contraction intensity.
Identifieur interne : 002B13 ( Main/Exploration ); précédent : 002B12; suivant : 002B14Muscle shear elastic modulus is linearly related to muscle torque over the entire range of isometric contraction intensity.
Auteurs : Filiz Ate [France] ; François Hug [Australie] ; Killian Bouillard [France] ; Marc Jubeau [France] ; Thomas Frappart [France] ; Mathieu Couade [France] ; Jeremy Bercoff [France] ; Antoine Nordez [France]Source :
- Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology [ 1873-5711 ] ; 2015.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- MESH :
- methods : Elasticity Imaging Techniques, Ergometry.
- physiology : Elastic Modulus, Fingers, Isometric Contraction, Muscle, Skeletal.
- Adult, Humans, Male, Torque.
Abstract
Muscle shear elastic modulus is linearly related to muscle torque during low-level contractions (<60% of Maximal Voluntary Contraction, MVC). This measurement can therefore be used to estimate changes in individual muscle force. However, it is not known if this relationship remains valid for higher intensities. The aim of this study was to determine: (i) the relationship between muscle shear elastic modulus and muscle torque over the entire range of isometric contraction and (ii) the influence of the size of the region of interest (ROI) used to average the shear modulus value. Ten healthy males performed two incremental isometric little finger abductions. The joint torque produced by Abductor Digiti Minimi was considered as an index of muscle torque and elastic modulus. A high coefficient of determination (R(2)) (range: 0.86-0.98) indicated that the relationship between elastic modulus and torque can be accurately modeled by a linear regression over the entire range (0% to 100% of MVC). The changes in shear elastic modulus as a function of torque were highly repeatable. Lower R(2) values (0.89±0.13 for 1/16 of ROI) and significantly increased absolute errors were observed when the shear elastic modulus was averaged over smaller ROI, half, 1/4 and 1/16 of the full ROI) than the full ROI (mean size: 1.18±0.24cm(2)). It suggests that the ROI should be as large as possible for accurate measurement of muscle shear modulus.
DOI: 10.1016/j.jelekin.2015.02.005
PubMed: 25956546
Affiliations:
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xml:lang="en">Muscle shear elastic modulus is linearly related to muscle torque over the entire range of isometric contraction intensity.</title><author><name sortKey="Ate, Filiz" sort="Ate, Filiz" uniqKey="Ate F" first="Filiz" last="Ate">Filiz Ate</name><affiliation wicri:level="3"><nlm:affiliation>EA 4334 "Motricité, Interactions, Performance", UFR STAPS, University of Nantes, Nantes, France. 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d'Azur</region><region type="old region">Provence-Alpes-Côte d'Azur</region><settlement type="city">Aix-en-Provence</settlement></placeName></affiliation></author><author><name sortKey="Couade, Mathieu" sort="Couade, Mathieu" uniqKey="Couade M" first="Mathieu" last="Couade">Mathieu Couade</name><affiliation wicri:level="3"><nlm:affiliation>Supersonic Imagine, Aix en Provence, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Supersonic Imagine, Aix en Provence</wicri:regionArea><placeName><region type="region">Provence-Alpes-Côte d'Azur</region><region type="old region">Provence-Alpes-Côte d'Azur</region><settlement type="city">Aix-en-Provence</settlement></placeName></affiliation></author><author><name sortKey="Bercoff, Jeremy" sort="Bercoff, Jeremy" uniqKey="Bercoff J" first="Jeremy" last="Bercoff">Jeremy Bercoff</name><affiliation wicri:level="3"><nlm:affiliation>Supersonic Imagine, Aix en Provence, France.</nlm:affiliation><country 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level="j">Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology</title><idno type="eISSN">1873-5711</idno><imprint><date when="2015" type="published">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adult</term><term>Elastic Modulus (physiology)</term><term>Elasticity Imaging Techniques (methods)</term><term>Ergometry (methods)</term><term>Fingers (physiology)</term><term>Humans</term><term>Isometric Contraction (physiology)</term><term>Male</term><term>Muscle, Skeletal (physiology)</term><term>Torque</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Adulte</term><term>Contraction isométrique (physiologie)</term><term>Doigts (physiologie)</term><term>Ergométrie ()</term><term>Humains</term><term>Imagerie d'élasticité tissulaire ()</term><term>Module d'élasticité (physiologie)</term><term>Moment de torsion</term><term>Muscles squelettiques (physiologie)</term><term>Mâle</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Elasticity Imaging Techniques</term><term>Ergometry</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Contraction isométrique</term><term>Doigts</term><term>Module d'élasticité</term><term>Muscles squelettiques</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Elastic Modulus</term><term>Fingers</term><term>Isometric Contraction</term><term>Muscle, Skeletal</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Adult</term><term>Humans</term><term>Male</term><term>Torque</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Adulte</term><term>Ergométrie</term><term>Humains</term><term>Imagerie d'élasticité tissulaire</term><term>Moment de torsion</term><term>Mâle</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Muscle shear elastic modulus is linearly related to muscle torque during low-level contractions (<60% of Maximal Voluntary Contraction, MVC). This measurement can therefore be used to estimate changes in individual muscle force. However, it is not known if this relationship remains valid for higher intensities. The aim of this study was to determine: (i) the relationship between muscle shear elastic modulus and muscle torque over the entire range of isometric contraction and (ii) the influence of the size of the region of interest (ROI) used to average the shear modulus value. Ten healthy males performed two incremental isometric little finger abductions. The joint torque produced by Abductor Digiti Minimi was considered as an index of muscle torque and elastic modulus. A high coefficient of determination (R(2)) (range: 0.86-0.98) indicated that the relationship between elastic modulus and torque can be accurately modeled by a linear regression over the entire range (0% to 100% of MVC). The changes in shear elastic modulus as a function of torque were highly repeatable. Lower R(2) values (0.89±0.13 for 1/16 of ROI) and significantly increased absolute errors were observed when the shear elastic modulus was averaged over smaller ROI, half, 1/4 and 1/16 of the full ROI) than the full ROI (mean size: 1.18±0.24cm(2)). It suggests that the ROI should be as large as possible for accurate measurement of muscle shear modulus.</div></front></TEI><affiliations><list><country><li>Australie</li><li>France</li></country><region><li>Pays de la Loire</li><li>Provence-Alpes-Côte d'Azur</li></region><settlement><li>Aix-en-Provence</li><li>Nantes</li></settlement></list><tree><country name="France"><region name="Pays de la Loire"><name sortKey="Ate, Filiz" sort="Ate, Filiz" uniqKey="Ate F" first="Filiz" last="Ate">Filiz Ate</name></region><name sortKey="Bercoff, Jeremy" sort="Bercoff, Jeremy" uniqKey="Bercoff J" first="Jeremy" last="Bercoff">Jeremy Bercoff</name><name sortKey="Bouillard, Killian" sort="Bouillard, Killian" uniqKey="Bouillard K" first="Killian" last="Bouillard">Killian Bouillard</name><name sortKey="Couade, Mathieu" sort="Couade, Mathieu" uniqKey="Couade M" first="Mathieu" last="Couade">Mathieu Couade</name><name sortKey="Frappart, Thomas" sort="Frappart, Thomas" uniqKey="Frappart T" first="Thomas" last="Frappart">Thomas Frappart</name><name sortKey="Jubeau, Marc" sort="Jubeau, Marc" uniqKey="Jubeau M" first="Marc" last="Jubeau">Marc Jubeau</name><name sortKey="Nordez, Antoine" sort="Nordez, Antoine" uniqKey="Nordez A" first="Antoine" last="Nordez">Antoine Nordez</name></country><country name="Australie"><noRegion><name sortKey="Hug, Francois" sort="Hug, Francois" uniqKey="Hug F" first="François" last="Hug">François Hug</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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