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Multi-Stimulus Multi-Response Posturography

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Author

Summary, in English

In this study a method for the analysis of simultaneous multiple measurements of kinematics and stabilizing forces related to human postural dynamics is proposed. Each subject in a group of normal subjects (n=10) was tested with eyes-open and eyes-closed with simultaneous but uncorrelated vestibular and proprioceptive stimuli in order to investigate the contributions of individual sensory feedback loops. Statistical analysis was made by means of multi-input multi-output identification of a transfer function from stimuli to stabilizing forces of the feet and the resulting body position, the transfer function being compatible with a biomechanical model formulated as a stabilized segmented inverted pendulum subject to feedback of body sway and position. Each individual model estimated is effective in predicting a subject's response to new stimuli and in describing the interacting effects of stimuli on body kinetics. The proposed methodology responds to the current needs of data analysis of multi-stimulus multi-response experiments.

Publishing year

2001

Language

English

Pages

41-59

Publication/Series

Mathematical Biosciences

Volume

174

Issue

1

Document type

Journal article

Publisher

Elsevier

Topic

  • Control Engineering

Keywords

  • System identification
  • Sensory feedback
  • Postural control
  • Posturography

Status

Published

ISBN/ISSN/Other

  • ISSN: 0025-5564