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Related Experiment Videos

Dynamics of pushing.

D Rancourt1, N Hogan

  • 1Department of Mechanical Engineering, Laval University, Pavillon Pouliot, Room 1504, Sainte-Foy, Québec, G1K 7P4, Canada. boloria@gmc.ulaval.ca

Journal of Motor Behavior
|December 6, 2001
PubMed
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Controlling pushing force magnitude is key. A dynamic model shows foot placement significantly impacts force control, with wider stances offering better modulation without counterintuitive force changes.

Area of Science:

  • Biomechanics
  • Human Motor Control
  • Robotics

Background:

  • Individuals employ various strategies to modulate pushing force magnitude.
  • Static models indicate significant variability in the efficacy of these strategies.

Purpose of the Study:

  • Propose a human motor control dynamic model to analyze force modulation transients.
  • Investigate the influence of limb impedance and foot placement on pushing force dynamics.

Main Methods:

  • Development of a dynamic model for human motor control.
  • Analysis of force modulation transients under different postural conditions.

Main Results:

  • Limb impedances (upper and lower) affect the time course of force variations.

Related Experiment Videos

  • Foot placement critically influences pushing force dynamics.
  • A feet-together posture limits the center of pressure range, potentially causing initial force reversals.
  • A feet-apart posture allows a larger center of pressure range, enabling smoother force modulation.

    • Conclusions:

    • Foot placement is a primary factor in effectively controlling hand pushing force.
    • Wider foot stances facilitate more intuitive and efficient force modulation compared to a feet-together stance.