Perturbation-Induced False Starts as a Test of the Jirsa–Kelso Excitator Model
Identifieur interne : 000E25 ( Pmc/Curation ); précédent : 000E24; suivant : 000E26Perturbation-Induced False Starts as a Test of the Jirsa–Kelso Excitator Model
Auteurs : Philip W. Fink [Nouvelle-Zélande] ; J. A. Scott Kelso ; Viktor K. Jirsa [France]Source :
- Journal of Motor Behavior [ 0022-2895 ] ; 2009.
Abstract
One difference between the excitator model and other theoretical models of coordination is the mechanism of discrete movement initiation. In addition to an imperative signal common to all discrete movement initiation, the excitator model proposes that movements are initiated when a threshold element in state space, the so-called
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DOI: 10.3200/JMBR.41.2.147-157
PubMed: 19201685
PubMed Central: 2637459
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Philip W. Fink<affiliation><nlm:aff id="A1">Center for Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton.</nlm:aff><wicri:noCountry code="subfield">Boca Raton.</wicri:noCountry></affiliation><affiliation wicri:level="1"><nlm:aff id="A3">Institute of Food, Nutrition, and Human Health, Massey University, Palmerston North, New Zealand.</nlm:aff><country xml:lang="fr" wicri:curation="lc">Nouvelle-Zélande</country><wicri:regionArea>Institute of Food, Nutrition, and Human Health, Massey University, Palmerston North</wicri:regionArea></affiliation><affiliation><nlm:aff id="A1">Center for Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton.</nlm:aff><wicri:noCountry code="subfield">Boca Raton.</wicri:noCountry></affiliation><affiliation><nlm:aff id="A1">Center for Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton.</nlm:aff><wicri:noCountry code="subfield">Boca Raton.</wicri:noCountry></affiliation><affiliation wicri:level="1"><nlm:aff id="A2">Theoretical Neuroscience Group, UMR6512 Institut Science du Mouvement, Marseille, France.</nlm:aff><country xml:lang="fr" wicri:curation="lc">France</country><wicri:regionArea>Theoretical Neuroscience Group, UMR6512 Institut Science du Mouvement, Marseille</wicri:regionArea></affiliation>Le document en format XML
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Scott Kelso</name><affiliation><nlm:aff id="A1">Center for Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton.</nlm:aff><wicri:noCountry code="subfield">Boca Raton.</wicri:noCountry></affiliation></author><author><name sortKey="Jirsa, Viktor K" sort="Jirsa, Viktor K" uniqKey="Jirsa V" first="Viktor K." last="Jirsa">Viktor K. Jirsa</name><affiliation><nlm:aff id="A1">Center for Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton.</nlm:aff><wicri:noCountry code="subfield">Boca Raton.</wicri:noCountry></affiliation><affiliation wicri:level="1"><nlm:aff id="A2">Theoretical Neuroscience Group, UMR6512 Institut Science du Mouvement, Marseille, France.</nlm:aff><country xml:lang="fr" wicri:curation="lc">France</country><wicri:regionArea>Theoretical Neuroscience Group, UMR6512 Institut Science du Mouvement, Marseille</wicri:regionArea></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">19201685</idno><idno type="pmc">2637459</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2637459</idno><idno type="RBID">PMC:2637459</idno><idno type="doi">10.3200/JMBR.41.2.147-157</idno><date when="2009">2009</date><idno type="wicri:Area/Pmc/Corpus">000E25</idno><idno type="wicri:Area/Pmc/Curation">000E25</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Perturbation-Induced False Starts as a Test of the Jirsa–Kelso Excitator Model</title><author><name sortKey="Fink, Philip W" sort="Fink, Philip W" uniqKey="Fink P" first="Philip W." last="Fink">Philip W. Fink</name><affiliation><nlm:aff id="A1">Center for Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton.</nlm:aff><wicri:noCountry code="subfield">Boca Raton.</wicri:noCountry></affiliation><affiliation wicri:level="1"><nlm:aff id="A3">Institute of Food, Nutrition, and Human Health, Massey University, Palmerston North, New Zealand.</nlm:aff><country xml:lang="fr" wicri:curation="lc">Nouvelle-Zélande</country><wicri:regionArea>Institute of Food, Nutrition, and Human Health, Massey University, Palmerston North</wicri:regionArea></affiliation></author><author><name sortKey="Kelso, J A Scott" sort="Kelso, J A Scott" uniqKey="Kelso J" first="J. A. Scott" last="Kelso">J. A. Scott Kelso</name><affiliation><nlm:aff id="A1">Center for Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton.</nlm:aff><wicri:noCountry code="subfield">Boca Raton.</wicri:noCountry></affiliation></author><author><name sortKey="Jirsa, Viktor K" sort="Jirsa, Viktor K" uniqKey="Jirsa V" first="Viktor K." last="Jirsa">Viktor K. Jirsa</name><affiliation><nlm:aff id="A1">Center for Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton.</nlm:aff><wicri:noCountry code="subfield">Boca Raton.</wicri:noCountry></affiliation><affiliation wicri:level="1"><nlm:aff id="A2">Theoretical Neuroscience Group, UMR6512 Institut Science du Mouvement, Marseille, France.</nlm:aff><country xml:lang="fr" wicri:curation="lc">France</country><wicri:regionArea>Theoretical Neuroscience Group, UMR6512 Institut Science du Mouvement, Marseille</wicri:regionArea></affiliation></author></analytic><series><title level="j">Journal of Motor Behavior</title><idno type="ISSN">0022-2895</idno><imprint><date when="2009">2009</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>One difference between the excitator model and other theoretical models of coordination is the mechanism of discrete movement initiation. In addition to an imperative signal common to all discrete movement initiation, the excitator model proposes that movements are initiated when a threshold element in state space, the so-called <italic>separatrix</italic>, is crossed as a consequence of stimulation or random fluctuations. The existence of a separatrix predicts that false starts will be caused by mechanical perturbations and that they depend on the perturbation's direction. The authors tested this prediction in a reaction-time task to an auditory stimulus. Participants applied perturbations in the direction of motion (i.e., index finger flexion) or opposed to the motion prior to the stimulus on 1/4 of the trials. The authors found false starts in 34% and 9% of trials following flexion perturbations and extension perturbations, respectively, as compared with only 2% of trials without perturbations, confirming a unique prediction of the excitator model.</p></div></front></TEI><pmc article-type="research-article" xml:lang="EN"><pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
<front><journal-meta><journal-id journal-id-type="nlm-ta">J Mot Behav</journal-id><journal-id journal-id-type="publisher-id">jmb</journal-id><journal-title>Journal of Motor Behavior</journal-title><issn pub-type="ppub">0022-2895</issn><publisher><publisher-name>Heldref Publications</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">19201685</article-id><article-id pub-id-type="pmc">2637459</article-id><article-id pub-id-type="doi">10.3200/JMBR.41.2.147-157</article-id><article-categories><subj-group subj-group-type="heading"><subject>Article</subject></subj-group></article-categories><title-group><article-title>Perturbation-Induced False Starts as a Test of the Jirsa–Kelso Excitator Model</article-title><alt-title>Jirsa–Kelso Excitator Model</alt-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Fink</surname><given-names>Philip W.</given-names></name><xref ref-type="aff" rid="A1">1</xref><xref ref-type="aff" rid="A3">3</xref></contrib><contrib contrib-type="author"><name><surname>Kelso</surname><given-names>J. A. Scott</given-names></name><xref ref-type="aff" rid="A1">1</xref></contrib><contrib contrib-type="author"><name><surname>Jirsa</surname><given-names>Viktor K.</given-names></name><xref ref-type="aff" rid="A1">1</xref><xref ref-type="aff" rid="A2">2</xref></contrib></contrib-group><aff id="A1"><label>1</label>Center for Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton.</aff><aff id="A2"><label>2</label>Theoretical Neuroscience Group, UMR6512 Institut Science du Mouvement, Marseille, France.</aff><aff id="A3"><label>3</label>Institute of Food, Nutrition, and Human Health, Massey University, Palmerston North, New Zealand.</aff><author-notes><corresp>Correspondence address: Philip W. Fink, Center for Complex Systems and Brain Sciences, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431, USA. E-mail address: <email>fink@ccs.fau.edu</email></corresp></author-notes><pub-date pub-type="ppub"><month>3</month><year>2009</year></pub-date><volume>41</volume><issue>2</issue><fpage>147</fpage><lpage>157</lpage><history><date date-type="received"><day>30</day><month>4</month><year>2007</year></date><date date-type="rev-recd"><day>21</day><month>12</month><year>2007</year></date><date date-type="accepted"><day>16</day><month>4</month><year>2008</year></date></history><permissions><copyright-statement>Copyright © 2009 Heldref Publications</copyright-statement><copyright-year>2009</copyright-year></permissions><abstract><p>One difference between the excitator model and other theoretical models of coordination is the mechanism of discrete movement initiation. In addition to an imperative signal common to all discrete movement initiation, the excitator model proposes that movements are initiated when a threshold element in state space, the so-called <italic>separatrix</italic>, is crossed as a consequence of stimulation or random fluctuations. The existence of a separatrix predicts that false starts will be caused by mechanical perturbations and that they depend on the perturbation's direction. The authors tested this prediction in a reaction-time task to an auditory stimulus. Participants applied perturbations in the direction of motion (i.e., index finger flexion) or opposed to the motion prior to the stimulus on 1/4 of the trials. The authors found false starts in 34% and 9% of trials following flexion perturbations and extension perturbations, respectively, as compared with only 2% of trials without perturbations, confirming a unique prediction of the excitator model.</p></abstract><kwd-group><kwd>coordination dynamics</kwd><kwd>excitator model</kwd><kwd>false starts</kwd><kwd>model testing</kwd></kwd-group><counts><fig-count count="4"></fig-count><table-count count="1"></table-count><ref-count count="65"></ref-count><page-count count="11"></page-count></counts></article-meta></front></pmc></record>Pour manipuler ce document sous Unix (Dilib)
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