Document Zbl 1308.92023

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Biosci.</a> <a href="/?q=in%3A329590" title="Articles in this Issue">245, No. 1, 86-95 (2013)</a>. </div> <div class="abstract">Summary: Ground reaction force during human quiet stance is modulated synchronously with the cardiac cycle through hemodynamics. This almost periodic hemodynamic force induces a small disturbance torque to the ankle joint, which is considered as a source of endogenous perturbation that induces postural sway. Here we consider postural sway dynamics of an inverted pendulum model with an intermittent control strategy, in comparison with the traditional continuous-time feedback controller. We examine whether each control model can exhibit human-like postural sway, characterized by its power law behavior at the low frequency band 0.1-0.7Hz, when it is weakly perturbed by periodic and/or random forcing mimicking the hemodynamic perturbation. We show that the continuous control model with typical feedback gain parameters hardly exhibits the human-like sway pattern, in contrast with the intermittent control model. Further analyses suggest that deterministic, including chaotic, slow oscillations that characterize the intermittent control strategy, together with the small hemodynamic perturbation, could be a possible mechanism for generating the postural sway.</div> <div class="clear"></div> <br> <div class="citations"><div class="clear"><a href="/?q=rf%3A6260568">Cited in <strong>8</strong> Documents</a></div></div> <div class="classification"> <h3>MSC:</h3> <table><tr> <td> <a class="mono" href="/classification/?q=cc%3A92C35" title="MSC2020">92C35</a> </td> <td class="space"> Physiological flow </td> </tr><tr> <td> <a class="mono" href="/classification/?q=cc%3A92B25" title="MSC2020">92B25</a> </td> <td class="space"> Biological rhythms and synchronization </td> </tr><tr> <td> <a class="mono" href="/classification/?q=cc%3A92C50" title="MSC2020">92C50</a> </td> <td class="space"> Medical applications (general) </td> </tr></table> </div><div class="keywords"> <h3>Keywords:</h3><a href="/?q=ut%3Apostural+sway">postural sway</a>; <a href="/?q=ut%3Aposture+control">posture control</a>; <a href="/?q=ut%3Aintermittent+control">intermittent control</a>; <a href="/?q=ut%3Apower+law">power law</a>; <a href="/?q=ut%3Ahemodynamics">hemodynamics</a>; <a href="/?q=ut%3Anoise">noise</a></div> <div class="software"> <h3>Software:</h3><a href="/software/967">TISEAN</a></div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1308.92023" data-ciurl="/ci/06260568" data-biburl="/bibtex/06260568.bib" data-amsurl="/amsrefs/06260568.bib" data-xmlurl="/xml/06260568.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/06260568.pdf" title="Zbl 1308.92023 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1016/j.mbs.2013.02.002" aria-label="DOI for “Modeling human postural sway using an intermittent control and hemodynamic perturbations”" title="10.1016/j.mbs.2013.02.002">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> <div class="references"> <h3>References:</h3> <table><tr> <td>[1]</td> <td class="space">Conforto, S.; 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