Method to Measure Tone of Axial and Proximal Muscle
Identifieur interne : 001D50 ( Ncbi/Curation ); précédent : 001D49; suivant : 001D51Method to Measure Tone of Axial and Proximal Muscle
Auteurs : Victor S. Gurfinkel ; Timothy W. Cacciatore ; Paul J. Cordo ; Fay B. HorakSource :
- Journal of Visualized Experiments : JoVE [ 1940-087X ] ; 2011.
Abstract
The control of tonic muscular activity remains poorly understood. While abnormal tone is commonly assessed clinically by measuring the passive resistance of relaxed limbs1, no systems are available to study tonic muscle control in a natural, active state of antigravity support. We have developed a device (Twister) to study tonic regulation of axial and proximal muscles during active postural maintenance (i.e. postural tone). Twister rotates axial body regions relative to each other about the vertical axis during stance, so as to twist the neck, trunk or hip regions. This twisting imposes length changes on axial muscles without changing the body's relationship to gravity. Because Twister does not provide postural support, tone must be regulated to counteract gravitational torques. We quantify this tonic regulation by the restive torque to twisting, which reflects the state of all muscles undergoing length changes, as well as by electromyography of relevant muscles. Because tone is characterized by long-lasting low-level muscle activity, tonic control is studied with slow movements that produce "tonic" changes in muscle length, without evoking fast "phasic" responses. Twister can be reconfigured to study various aspects of muscle tone, such as co-contraction, tonic modulation to postural changes, tonic interactions across body segments, as well as perceptual thresholds to slow axial rotation. Twister can also be used to provide a quantitative measurement of the effects of disease on axial and proximal postural tone and assess the efficacy of intervention.
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DOI: 10.3791/3677
PubMed: 22214974
PubMed Central: 3369643
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Victor S. Gurfinkel<affiliation><nlm:aff id="I1481D3415">Department of Biomedical Engineering, Oregon Health and Science University</nlm:aff><wicri:noCountry code="subfield">Oregon Health and Science University</wicri:noCountry></affiliation><affiliation><nlm:aff id="I27190D3416">UCL Institute of Neurology, Queen Square</nlm:aff><wicri:noCountry code="subfield">Queen Square</wicri:noCountry></affiliation><affiliation><nlm:aff id="I1481D3415">Department of Biomedical Engineering, Oregon Health and Science University</nlm:aff><wicri:noCountry code="subfield">Oregon Health and Science University</wicri:noCountry></affiliation><affiliation><nlm:aff id="I1481D3417">Department of Neurology, Oregon Health and Science University</nlm:aff><wicri:noCountry code="subfield">Oregon Health and Science University</wicri:noCountry></affiliation>Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Method to Measure Tone of Axial and Proximal Muscle</title><author><name sortKey="Gurfinkel, Victor S" sort="Gurfinkel, Victor S" uniqKey="Gurfinkel V" first="Victor S." last="Gurfinkel">Victor S. Gurfinkel</name><affiliation><nlm:aff id="I1481D3415">Department of Biomedical Engineering, Oregon Health and Science University</nlm:aff><wicri:noCountry code="subfield">Oregon Health and Science University</wicri:noCountry></affiliation></author><author><name sortKey="Cacciatore, Timothy W" sort="Cacciatore, Timothy W" uniqKey="Cacciatore T" first="Timothy W." last="Cacciatore">Timothy W. Cacciatore</name><affiliation><nlm:aff id="I27190D3416">UCL Institute of Neurology, Queen Square</nlm:aff><wicri:noCountry code="subfield">Queen Square</wicri:noCountry></affiliation></author><author><name sortKey="Cordo, Paul J" sort="Cordo, Paul J" uniqKey="Cordo P" first="Paul J." last="Cordo">Paul J. Cordo</name><affiliation><nlm:aff id="I1481D3415">Department of Biomedical Engineering, Oregon Health and Science University</nlm:aff><wicri:noCountry code="subfield">Oregon Health and Science University</wicri:noCountry></affiliation></author><author><name sortKey="Horak, Fay B" sort="Horak, Fay B" uniqKey="Horak F" first="Fay B." last="Horak">Fay B. Horak</name><affiliation><nlm:aff id="I1481D3417">Department of Neurology, Oregon Health and Science University</nlm:aff><wicri:noCountry code="subfield">Oregon Health and Science University</wicri:noCountry></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">22214974</idno><idno type="pmc">3369643</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3369643</idno><idno type="RBID">PMC:3369643</idno><idno type="doi">10.3791/3677</idno><date when="2011">2011</date><idno type="wicri:Area/Pmc/Corpus">002074</idno><idno type="wicri:Area/Pmc/Curation">002074</idno><idno type="wicri:Area/Pmc/Checkpoint">001A90</idno><idno type="wicri:Area/Ncbi/Merge">001D50</idno><idno type="wicri:Area/Ncbi/Curation">001D50</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Method to Measure Tone of Axial and Proximal Muscle</title><author><name sortKey="Gurfinkel, Victor S" sort="Gurfinkel, Victor S" uniqKey="Gurfinkel V" first="Victor S." last="Gurfinkel">Victor S. Gurfinkel</name><affiliation><nlm:aff id="I1481D3415">Department of Biomedical Engineering, Oregon Health and Science University</nlm:aff><wicri:noCountry code="subfield">Oregon Health and Science University</wicri:noCountry></affiliation></author><author><name sortKey="Cacciatore, Timothy W" sort="Cacciatore, Timothy W" uniqKey="Cacciatore T" first="Timothy W." last="Cacciatore">Timothy W. Cacciatore</name><affiliation><nlm:aff id="I27190D3416">UCL Institute of Neurology, Queen Square</nlm:aff><wicri:noCountry code="subfield">Queen Square</wicri:noCountry></affiliation></author><author><name sortKey="Cordo, Paul J" sort="Cordo, Paul J" uniqKey="Cordo P" first="Paul J." last="Cordo">Paul J. Cordo</name><affiliation><nlm:aff id="I1481D3415">Department of Biomedical Engineering, Oregon Health and Science University</nlm:aff><wicri:noCountry code="subfield">Oregon Health and Science University</wicri:noCountry></affiliation></author><author><name sortKey="Horak, Fay B" sort="Horak, Fay B" uniqKey="Horak F" first="Fay B." last="Horak">Fay B. Horak</name><affiliation><nlm:aff id="I1481D3417">Department of Neurology, Oregon Health and Science University</nlm:aff><wicri:noCountry code="subfield">Oregon Health and Science University</wicri:noCountry></affiliation></author></analytic><series><title level="j">Journal of Visualized Experiments : JoVE</title><idno type="eISSN">1940-087X</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>The control of tonic muscular activity remains poorly understood. While abnormal tone is commonly assessed clinically by measuring the passive resistance of relaxed limbs<sup>1</sup>, no systems are available to study tonic muscle control in a natural, active state of antigravity support. We have developed a device (Twister) to study tonic regulation of axial and proximal muscles during active postural maintenance (i.e. postural tone). Twister rotates axial body regions relative to each other about the vertical axis during stance, so as to twist the neck, trunk or hip regions. This twisting imposes length changes on axial muscles without changing the body's relationship to gravity. Because Twister does not provide postural support, tone must be regulated to counteract gravitational torques. We quantify this tonic regulation by the restive torque to twisting, which reflects the state of all muscles undergoing length changes, as well as by electromyography of relevant muscles. Because tone is characterized by long-lasting low-level muscle activity, tonic control is studied with slow movements that produce "tonic" changes in muscle length, without evoking fast "phasic" responses. Twister can be reconfigured to study various aspects of muscle tone, such as co-contraction, tonic modulation to postural changes, tonic interactions across body segments, as well as perceptual thresholds to slow axial rotation. Twister can also be used to provide a quantitative measurement of the effects of disease on axial and proximal postural tone and assess the efficacy of intervention.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Foster, M" uniqKey="Foster M">M Foster</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Zatsiorsky, Vm" uniqKey="Zatsiorsky V">VM Zatsiorsky</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kumar, S" uniqKey="Kumar S">S Kumar</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kumar, S" uniqKey="Kumar S">S Kumar</name></author><author><name sortKey="Panjabi, Mm" uniqKey="Panjabi M">MM Panjabi</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Lamoth, Cj" uniqKey="Lamoth C">CJ Lamoth</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Gurfinkel, V" uniqKey="Gurfinkel V">V Gurfinkel</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Wright, Wg" uniqKey="Wright W">WG Wright</name></author><author><name sortKey="Gurfinkel, Vs" uniqKey="Gurfinkel V">VS Gurfinkel</name></author><author><name sortKey="Nutt, J" uniqKey="Nutt J">J Nutt</name></author><author><name sortKey="Horak, Fb" uniqKey="Horak F">FB Horak</name></author><author><name sortKey="Cordo, Pj" uniqKey="Cordo P">PJ Cordo</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Cacciatore, Tw" uniqKey="Cacciatore T">TW Cacciatore</name></author><author><name sortKey="Gurfinkel, Vs" uniqKey="Gurfinkel V">VS Gurfinkel</name></author><author><name sortKey="Horak, Fb" uniqKey="Horak F">FB Horak</name></author><author><name sortKey="Cordo, Pj" uniqKey="Cordo P">PJ Cordo</name></author><author><name sortKey="Ames, Ke" uniqKey="Ames K">KE Ames</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Franzen, E" uniqKey="Franzen E">E Franzen</name></author><author><name sortKey="Gurfinkel, Vs" uniqKey="Gurfinkel V">VS Gurfinkel</name></author><author><name sortKey="Wright, Wg" uniqKey="Wright W">WG Wright</name></author><author><name sortKey="Cordo, Pj" uniqKey="Cordo P">PJ Cordo</name></author><author><name sortKey="Horak, Fb" uniqKey="Horak F">FB Horak</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Franzen, E" uniqKey="Franzen E">E Franzen</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Wright, Wg" uniqKey="Wright W">WG Wright</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Sinkjaer, T" uniqKey="Sinkjaer T">T Sinkjaer</name></author><author><name sortKey="Toft, E" uniqKey="Toft E">E Toft</name></author><author><name sortKey="Andreassen, S" uniqKey="Andreassen S">S Andreassen</name></author><author><name sortKey="Hornemann, B" uniqKey="Hornemann B">B Hornemann</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Sherrington, C" uniqKey="Sherrington C">C Sherrington</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Wright, Wg" uniqKey="Wright W">WG Wright</name></author><author><name sortKey="Gurfinkel, V" uniqKey="Gurfinkel V">V Gurfinkel</name></author><author><name sortKey="King, L" uniqKey="King L">L King</name></author><author><name sortKey="Horak, F" uniqKey="Horak F">F Horak</name></author></analytic></biblStruct></listBibl></div1></back></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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