The Concept Of Metastability For One-Legged Standing

POSTER

Abstract

Standing on one foot has been characterized by a continuum between static equilibrium (standing) and dynamic equilibrium (walking). This suggests that sways of the body are important for a person to maintain the upright position and prevent a fall. We examine the center of pressure (COP) changes with and without visual input, and find that the character of the COP dynamics is different on different timescales; it is random (stochastic) on short timescales ($0< t< 20 \, \mbox{ms}$), ballistic (deterministic) on intermediate timescales ($20 \, \mbox{ms} < t < 200 \, \mbox{ms}$), and random on long timescales.

Authors

  • Ulrich Zurcher

    Physics, Cleveland State University

  • Don Anderson

    Univ of Michigan - Ann Arbor, The University of Texas at Dallas, Ball State University, Department of Physics, Kettering University, Institute of Physics, University of Brasilia, Brazil, Department of Chemistry and Biochemistry, Kettering University, Center for Photovoltaics Innovation and Commercialization (PVIC), Department of Physics and Astronomy, University of Toledo, Univ of Toledo, Department of Physics, Sri Venkateswara University,Tirupati-517 502, Universidad de La Habana, Ohio State Univ - Columbus, Miami University, Physical Therapy, Eastern Michigan University, Physics, Cleveland State University, Youngstown State Univ, Department of Mechanical Engineering, Youngstown State University, Student

  • Don Anderson

    Univ of Michigan - Ann Arbor, The University of Texas at Dallas, Ball State University, Department of Physics, Kettering University, Institute of Physics, University of Brasilia, Brazil, Department of Chemistry and Biochemistry, Kettering University, Center for Photovoltaics Innovation and Commercialization (PVIC), Department of Physics and Astronomy, University of Toledo, Univ of Toledo, Department of Physics, Sri Venkateswara University,Tirupati-517 502, Universidad de La Habana, Ohio State Univ - Columbus, Miami University, Physical Therapy, Eastern Michigan University, Physics, Cleveland State University, Youngstown State Univ, Department of Mechanical Engineering, Youngstown State University, Student

  • Don Anderson

    Univ of Michigan - Ann Arbor, The University of Texas at Dallas, Ball State University, Department of Physics, Kettering University, Institute of Physics, University of Brasilia, Brazil, Department of Chemistry and Biochemistry, Kettering University, Center for Photovoltaics Innovation and Commercialization (PVIC), Department of Physics and Astronomy, University of Toledo, Univ of Toledo, Department of Physics, Sri Venkateswara University,Tirupati-517 502, Universidad de La Habana, Ohio State Univ - Columbus, Miami University, Physical Therapy, Eastern Michigan University, Physics, Cleveland State University, Youngstown State Univ, Department of Mechanical Engineering, Youngstown State University, Student