Stiffness mapping of lower leg muscles during passive dorsiflexion.
Identifieur interne : 000349 ( Main/Exploration ); précédent : 000348; suivant : 000350Stiffness mapping of lower leg muscles during passive dorsiflexion.
Auteurs : Guillaume Le Sant [France] ; Antoine Nordez [France] ; Ricardo Andrade [France] ; François Hug [France] ; Sandro Freitas [Portugal] ; Raphaël Gross [France]Source :
- Journal of anatomy [ 1469-7580 ] ; 2017.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- MESH :
- methods : Elasticity Imaging Techniques, Ergometry.
- physiology : Knee Joint, Leg, Muscle, Skeletal, Range of Motion, Articular.
- Female, Humans, Male, Young Adult.
Abstract
It is challenging to differentiate the mechanical properties of synergist muscles in vivo. Shear wave elastography can be used to quantify the shear modulus (i.e. an index of stiffness) of a specific muscle. This study assessed the passive behavior of lower leg muscles during passive dorsiflexion performed with the knee fully extended (experiment 1, n = 22) or with the knee flexed at 90° (experiment 2, n = 20). The shear modulus measurements were repeated twice during experiment 1 to assess the inter-day reliability. During both experiments, the shear modulus of the following plantar flexors was randomly measured: gastrocnemii medialis (GM) and lateralis (GL), soleus (SOL), peroneus longus (PL), and the deep muscles flexor digitorum longus (FDL), flexor hallucis longus (FHL), tibialis posterior (TP). Two antagonist muscles tibialis anterior (TA), and extensor digitorum longus (EDL) were also recorded. Measurements were performed in different proximo-distal regions for GM, GL and SOL. Inter-day reliability was adequate for all muscles (coefficient of variation < 15%), except for TP. In experiment 1, GM exhibited the highest shear modulus at 80% of the maximal range of motion (128.5 ± 27.3 kPa) and was followed by GL (67.1 ± 24.1 kPa). In experiment 2, SOL exhibited the highest shear modulus (55.1 ± 18.0 kPa). The highest values of shear modulus were found for the distal locations of both the GM (80% of participants in experiment 1) and the SOL (100% of participants in experiment 2). For both experiments, deep muscles and PL exhibited low levels of stiffness during the stretch in young asymptomatic adults, which was unknown until now. These results provide a deeper understanding of passive mechanical properties and the distribution of stiffness between and within the plantar flexor muscles during stretching between them and thus could be relevant to study the effects of aging, disease progression, and rehabilitation on stiffness.
DOI: 10.1111/joa.12589
PubMed: 28251615
Affiliations:
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sort="Nordez, Antoine" uniqKey="Nordez A" first="Antoine" last="Nordez">Antoine Nordez</name><affiliation wicri:level="3"><nlm:affiliation>University of Nantes, Laboratory 'Movement, Interactions, Performance' (EA 4334), Faculty of Sport Sciences, Nantes, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>University of Nantes, Laboratory 'Movement, Interactions, Performance' (EA 4334), Faculty of Sport Sciences, Nantes</wicri:regionArea><placeName><region type="region">Pays de la Loire</region><region type="old region">Pays de la Loire</region><settlement type="city">Nantes</settlement></placeName></affiliation></author><author><name sortKey="Andrade, Ricardo" sort="Andrade, Ricardo" uniqKey="Andrade R" first="Ricardo" last="Andrade">Ricardo Andrade</name><affiliation wicri:level="3"><nlm:affiliation>University of Nantes, Laboratory 'Movement, Interactions, Performance' (EA 4334), Faculty of Sport Sciences, Nantes, France.</nlm:affiliation><country 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type="city">Nantes</settlement></placeName></affiliation></author><author><name sortKey="Freitas, Sandro" sort="Freitas, Sandro" uniqKey="Freitas S" first="Sandro" last="Freitas">Sandro Freitas</name><affiliation wicri:level="1"><nlm:affiliation>Faculdade de Motricidade Humana, CIPER, Universidade de Lisboa, Lisbon, Portugal.</nlm:affiliation><country xml:lang="fr">Portugal</country><wicri:regionArea>Faculdade de Motricidade Humana, CIPER, Universidade de Lisboa, Lisbon</wicri:regionArea><wicri:noRegion>Lisbon</wicri:noRegion></affiliation></author><author><name sortKey="Gross, Raphael" sort="Gross, Raphael" uniqKey="Gross R" first="Raphaël" last="Gross">Raphaël Gross</name><affiliation wicri:level="3"><nlm:affiliation>University of Nantes, Laboratory 'Movement, Interactions, Performance' (EA 4334), Faculty of Sport Sciences, Nantes, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>University of Nantes, Laboratory 'Movement, Interactions, Performance' (EA 4334), Faculty of Sport Sciences, Nantes</wicri:regionArea><placeName><region type="region">Pays de la Loire</region><region type="old region">Pays de la Loire</region><settlement type="city">Nantes</settlement></placeName></affiliation></author></analytic><series><title level="j">Journal of anatomy</title><idno type="eISSN">1469-7580</idno><imprint><date when="2017" type="published">2017</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Elasticity Imaging Techniques (methods)</term><term>Ergometry (methods)</term><term>Female</term><term>Humans</term><term>Knee Joint (physiology)</term><term>Leg (physiology)</term><term>Male</term><term>Muscle, Skeletal (physiology)</term><term>Range of Motion, Articular (physiology)</term><term>Young Adult</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Amplitude articulaire (physiologie)</term><term>Articulation du genou (physiologie)</term><term>Ergométrie ()</term><term>Femelle</term><term>Humains</term><term>Imagerie d'élasticité tissulaire ()</term><term>Jambe (physiologie)</term><term>Jeune adulte</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>Amplitude articulaire</term><term>Articulation du genou</term><term>Jambe</term><term>Muscles squelettiques</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Knee Joint</term><term>Leg</term><term>Muscle, Skeletal</term><term>Range of Motion, Articular</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Female</term><term>Humans</term><term>Male</term><term>Young Adult</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Ergométrie</term><term>Femelle</term><term>Humains</term><term>Imagerie d'élasticité tissulaire</term><term>Jeune adulte</term><term>Mâle</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">It is challenging to differentiate the mechanical properties of synergist muscles in vivo. Shear wave elastography can be used to quantify the shear modulus (i.e. an index of stiffness) of a specific muscle. This study assessed the passive behavior of lower leg muscles during passive dorsiflexion performed with the knee fully extended (experiment 1, n = 22) or with the knee flexed at 90° (experiment 2, n = 20). The shear modulus measurements were repeated twice during experiment 1 to assess the inter-day reliability. During both experiments, the shear modulus of the following plantar flexors was randomly measured: gastrocnemii medialis (GM) and lateralis (GL), soleus (SOL), peroneus longus (PL), and the deep muscles flexor digitorum longus (FDL), flexor hallucis longus (FHL), tibialis posterior (TP). Two antagonist muscles tibialis anterior (TA), and extensor digitorum longus (EDL) were also recorded. Measurements were performed in different proximo-distal regions for GM, GL and SOL. Inter-day reliability was adequate for all muscles (coefficient of variation < 15%), except for TP. In experiment 1, GM exhibited the highest shear modulus at 80% of the maximal range of motion (128.5 ± 27.3 kPa) and was followed by GL (67.1 ± 24.1 kPa). In experiment 2, SOL exhibited the highest shear modulus (55.1 ± 18.0 kPa). The highest values of shear modulus were found for the distal locations of both the GM (80% of participants in experiment 1) and the SOL (100% of participants in experiment 2). For both experiments, deep muscles and PL exhibited low levels of stiffness during the stretch in young asymptomatic adults, which was unknown until now. These results provide a deeper understanding of passive mechanical properties and the distribution of stiffness between and within the plantar flexor muscles during stretching between them and thus could be relevant to study the effects of aging, disease progression, and rehabilitation on stiffness.</div></front></TEI><affiliations><list><country><li>France</li><li>Portugal</li></country><region><li>Pays de la Loire</li></region><settlement><li>Nantes</li></settlement></list><tree><country name="France"><region name="Pays de la Loire"><name sortKey="Le Sant, Guillaume" sort="Le Sant, Guillaume" uniqKey="Le Sant G" first="Guillaume" last="Le Sant">Guillaume Le Sant</name></region><name sortKey="Andrade, Ricardo" sort="Andrade, Ricardo" uniqKey="Andrade R" first="Ricardo" last="Andrade">Ricardo Andrade</name><name sortKey="Gross, Raphael" sort="Gross, Raphael" uniqKey="Gross R" first="Raphaël" last="Gross">Raphaël Gross</name><name sortKey="Hug, Francois" sort="Hug, Francois" uniqKey="Hug F" first="François" last="Hug">François Hug</name><name sortKey="Nordez, Antoine" sort="Nordez, Antoine" uniqKey="Nordez A" first="Antoine" last="Nordez">Antoine Nordez</name></country><country name="Portugal"><noRegion><name sortKey="Freitas, Sandro" sort="Freitas, Sandro" uniqKey="Freitas S" first="Sandro" last="Freitas">Sandro Freitas</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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