A Balance Control Model of Quiet Upright Stance Based on an Optimal Control Strategy

Details

• Personal Author:
  Madigan ML ; Nussbaum MA ; Qu X
• Description:
  Models of balance control can aid in understanding the mechanisms by which humans maintain balance. A balance control model of quiet upright stance based on an optimal control strategy is presented here. In this model, the human body was represented by a simple single-segment inverted pendulum during upright stance, and the neural controller was assumed to be an optimal controller that generates ankle control torques according to a certain performance criterion. This performance criterion was defined by several physical quantities relevant to sway. In order to accurately simulate existing experimental data, an optimization procedure was used to specify the set of model parameters to minimize the scalar error between experimental and simulated sway measures. Thirty-two independent simulations were performed for both younger and older adults. The model's capabilities, in terms of reflecting sway behaviors and identifying aging effects, were then analyzed based on the simulation results. The model was able to accurately predict center-of-pressure-based sway measures, and identify potential changes in balance control mechanisms caused by aging. Correlations between sway measures and model parameters are also discussed. [Description provided by NIOSH]
• Subjects:
  Age Factors Electrophysiology Ergonomics Musculoskeletal System Occupational Health Safety
• Keywords:
  Age-factors Electrophysiological-measurements Inner-ear Mathematical-models Muscle-tension Muscles Musculoskeletal-system Statistical-analysis
• ISSN:
  0021-9290
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  40
• Issue:
  16
• NIOSHTIC Number:
  nn:20033208
• Citation:
  J Biomech 2007 Jun; 40(16):3590-3597
• Contact Point Address:
  Maury A. Nussbaum, Department of Industrial and Systems Engineering, School of Biomedical Engineering and Sciences, Virginia Tech, 250 Durham Hall (0118), Blacksburg, VA 24061
• Federal Fiscal Year:
  2007
• Performing Organization:
  Virginia Polytechnic Institute and State University
• Peer Reviewed:
  True
• Start Date:
  20000930
• Source Full Name:
  Journal of Biomechanics
• End Date:
  20040929
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:6a30a09d109aec6a2abd520852372534082617ba1bf7dcfbd996988d2fe2f3c96df6e06c7ecbd1d31063e2c17e95c992557343df905871c02fc200d296e72de6
• Download URL:
  https://stacks.cdc.gov/view/cdc/188876/cdc_188876_DS1.pdf
• File Type:
  [PDF - 193.35 KB ]