Nature of the coupling between neural drive and force-generating capacity in the human quadriceps muscle
Identifieur interne : 000221 ( Pmc/Corpus ); précédent : 000220; suivant : 000222Nature of the coupling between neural drive and force-generating capacity in the human quadriceps muscle
Auteurs : François Hug ; Clément Goupille ; Daniel Baum ; Brent J. Raiteri ; Paul W. Hodges ; Kylie TuckerSource :
- Proceedings of the Royal Society B: Biological Sciences [ 0962-8452 ] ; 2015.
Abstract
The force produced by a muscle depends on both the neural drive it receives and several biomechanical factors. When multiple muscles act on a single joint, the nature of the relationship between the neural drive and force-generating capacity of the synergistic muscles is largely unknown. This study aimed to determine the relationship between the ratio of neural drive and the ratio of muscle force-generating capacity between two synergist muscles (vastus lateralis (VL) and vastus medialis (VM)) in humans. Twenty-one participants performed isometric knee extensions at 20 and 50% of maximal voluntary contractions (MVC). Myoelectric activity (surface electromyography (EMG)) provided an index of neural drive. Physiological cross-sectional area (PCSA) was estimated from measurements of muscle volume (magnetic resonance imaging) and muscle fascicle length (three-dimensional ultrasound imaging) to represent the muscles' force-generating capacities. Neither PCSA nor neural drive was balanced between VL and VM. There was a large (
Url:
DOI: 10.1098/rspb.2015.1908
PubMed: 26609085
PubMed Central: 4685812
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PMC:4685812Le document en format XML
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<affiliation><nlm:aff id="af2"><addr-line>Laboratory EA 4334 ‘Movement, Interactions, Performance’</addr-line>
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<front><div type="abstract" xml:lang="en"><p>The force produced by a muscle depends on both the neural drive it receives and several biomechanical factors. When multiple muscles act on a single joint, the nature of the relationship between the neural drive and force-generating capacity of the synergistic muscles is largely unknown. This study aimed to determine the relationship between the ratio of neural drive and the ratio of muscle force-generating capacity between two synergist muscles (vastus lateralis (VL) and vastus medialis (VM)) in humans. Twenty-one participants performed isometric knee extensions at 20 and 50% of maximal voluntary contractions (MVC). Myoelectric activity (surface electromyography (EMG)) provided an index of neural drive. Physiological cross-sectional area (PCSA) was estimated from measurements of muscle volume (magnetic resonance imaging) and muscle fascicle length (three-dimensional ultrasound imaging) to represent the muscles' force-generating capacities. Neither PCSA nor neural drive was balanced between VL and VM. There was a large (<italic>r</italic>
= 0.68) and moderate (<italic>r</italic>
= 0.43) correlation between the ratio of VL/VM EMG amplitude and the ratio of VL/VM PCSA at 20 and 50% of MVC, respectively. This study provides evidence that neural drive is biased by muscle force-generating capacity, the greater the force-generating capacity of VL compared with VM, the stronger bias of drive to the VL.</p>
</div>
</front>
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<title-group><article-title>Nature of the coupling between neural drive and force-generating capacity in the human quadriceps muscle</article-title>
<alt-title alt-title-type="short">muscle activation and PCSA</alt-title>
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<contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid" authenticated="false">http://orcid.org/0000-0002-6432-558X</contrib-id>
<name><surname>Hug</surname>
<given-names>François</given-names>
</name>
<xref ref-type="aff" rid="af1">1</xref>
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<contrib contrib-type="author"><name><surname>Goupille</surname>
<given-names>Clément</given-names>
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<xref ref-type="aff" rid="af2">2</xref>
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<contrib contrib-type="author"><name><surname>Baum</surname>
<given-names>Daniel</given-names>
</name>
<xref ref-type="aff" rid="af3">3</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Raiteri</surname>
<given-names>Brent J.</given-names>
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<xref ref-type="aff" rid="af4">4</xref>
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<contrib contrib-type="author"><name><surname>Hodges</surname>
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<xref ref-type="author-notes" rid="AN1">†</xref>
</contrib>
<contrib contrib-type="author"><contrib-id contrib-id-type="orcid" authenticated="false">http://orcid.org/0000-0003-4976-7483</contrib-id>
<name><surname>Tucker</surname>
<given-names>Kylie</given-names>
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<xref ref-type="aff" rid="af1">1</xref>
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,<country>Australia</country>
</aff>
<aff id="af2"><label>2</label>
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<aff id="af3"><label>3</label>
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, and</aff>
<aff id="af4"><label>4</label>
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,<institution>The University of Queensland</institution>
,<addr-line>Brisbane</addr-line>
,<country>Australia</country>
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<author-notes><corresp id="cor1">e-mail: <email>francois.hug@univ-nantes.fr</email>
</corresp>
<fn id="AN1" fn-type="con"><label>†</label>
<p>These authors contributed equally to this work.</p>
</fn>
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<pub-date pub-type="ppub"><day>22</day>
<month>11</month>
<year>2015</year>
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<issue>1819</issue>
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<history><date date-type="received"><day>7</day>
<month>8</month>
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<date date-type="accepted"><day>26</day>
<month>10</month>
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<permissions><copyright-statement>© 2015 The Author(s)</copyright-statement>
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<abstract><p>The force produced by a muscle depends on both the neural drive it receives and several biomechanical factors. When multiple muscles act on a single joint, the nature of the relationship between the neural drive and force-generating capacity of the synergistic muscles is largely unknown. This study aimed to determine the relationship between the ratio of neural drive and the ratio of muscle force-generating capacity between two synergist muscles (vastus lateralis (VL) and vastus medialis (VM)) in humans. Twenty-one participants performed isometric knee extensions at 20 and 50% of maximal voluntary contractions (MVC). Myoelectric activity (surface electromyography (EMG)) provided an index of neural drive. Physiological cross-sectional area (PCSA) was estimated from measurements of muscle volume (magnetic resonance imaging) and muscle fascicle length (three-dimensional ultrasound imaging) to represent the muscles' force-generating capacities. Neither PCSA nor neural drive was balanced between VL and VM. There was a large (<italic>r</italic>
= 0.68) and moderate (<italic>r</italic>
= 0.43) correlation between the ratio of VL/VM EMG amplitude and the ratio of VL/VM PCSA at 20 and 50% of MVC, respectively. This study provides evidence that neural drive is biased by muscle force-generating capacity, the greater the force-generating capacity of VL compared with VM, the stronger bias of drive to the VL.</p>
</abstract>
<kwd-group><kwd>electromyography</kwd>
<kwd>physiological cross-sectional area</kwd>
<kwd>quadriceps</kwd>
</kwd-group>
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