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Analysis of human postural control during spontaneous sway using an optimal control model.

Authors
Qu-X; Nussbaum-MA; Madigan-ML
Source
Proceedings of the Human Factors and Ergonomics Society 50th Annual Meeting, Oct. 16-20, 2006, San Francisco, California. Santa Monica, CA: Human Factors and Ergonomics Society, 2006 Oct; 50(13):1137-1141
NIOSHTIC No.
20041009
Abstract
Models of human postural control aid in understanding human capabilities and limitations, and may facilitate a reduction in injuries related to loss-of-balance. Such a model is presented here to simulate and interpret the postural control system during spontaneous sway. The human body was represented by a simple inverted pendulum, with the neural controller assumed to be an optimal controller that generates spontaneous sway according to a certain performance criterion. In order to accurately simulate existing experimental data, an optimization procedure was used to specify the set of model parameters. Ten independent simulations were performed for both young and older adults. Aging effects were then analyzed based on the simulation results. The results showed that this model was able to simulate some center-of-pressure measures reported in experimental studies, and indicated potential changes in postural control mechanisms caused by aging.
Keywords
Humans; Men; Women; Posture; Musculoskeletal-system; Muscle-function; Muscles; Physical-capacity; Physiological-function; Physiological-measurements; Physiology; Age-groups; Age-factors
Contact
Michael L. Madigan, Department of Engineering Science and Mechanics, Virginia Tech, Mail Code 0219, Blacksburg, VA 24061
CODEN
PHFSDQ
Publication Date
20061001
Document Type
Conference/Symposia Proceedings
Funding Type
Grant
Fiscal Year
2007
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-007882
Issue of Publication
13
ISSN
1071-1813
Source Name
Proceedings of the Human Factors and Ergonomics Society 50th Annual Meeting, Oct. 16-20, 2006, San Francisco, California
State
VA
Performing Organization
Virginia Polytechnic Institute and State University
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