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Assessing postural stability via the correlation patterns of vertical ground reaction force components.
Chih-Yuan Hong1, Lan-Yuen Guo2, Rong Song3
1Department of Mechanical and Electromechanical Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan.
Biomedical Engineering Online
|August 4, 2016
Summary
This study introduces new methods to assess human postural balance using ground reaction force (GRF) components. These novel features are more sensitive to aging than traditional methods and reduce equipment costs.
Area of Science:
- Biomechanics
- Human postural stability
- Sensorimotor control
Background:
- Assessing human postural balance commonly uses force plate data, focusing on center of pressure (COP) trajectory.
- Existing methods for postural stability analysis often rely on complex force plate measurements.
Purpose of the Study:
- To develop novel stability measures derived from ground reaction force (GRF) components.
- To evaluate the efficacy of these new features in assessing postural control and age-related differences.
Main Methods:
- Proposed three feature sets based on correlation patterns among vertical GRF (VGRF) components.
- Assessed feature strength, changing speed, and stabilizing effects on COP.
- Utilized features to classify young (18-24 years) and older (65-73 years) adults during quiet standing.
Main Results:
- Demonstrated the reliability and sensitivity of the proposed GRF-based features.
- Showed features are more sensitive to aging effects compared to conventional COP and COM features.
- Achieved accurate classification of age groups using the novel features.
Conclusions:
- Three new feature sets derived from VGRF correlation patterns effectively assess human postural stability.
- Proposed features are robust, accurate for age classification, and outperform tested COP/COM features.
- Reduced force sensing requirements from 3D to 1D, significantly lowering system costs.
