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A simple method for determination of gait events.
Andrew H Hansen1, Dudley S Childress, Margrit R Meier
1Department of Veterans Affairs, Lakeside Division, Chicago, IL, USA. a-hansen@northwestern.edu
Journal of Biomechanics
|December 19, 2001
Summary
This study introduces a simple method to identify key gait events like heel-contact and toe-off. It uses center of pressure and ankle marker data for accurate gait analysis.
Area of Science:
- Biomechanics
- Gait Analysis
- Human Movement Science
Background:
- Accurate gait event detection is crucial for analyzing gait data.
- Existing methods may require complex setups or specific equipment.
Purpose of the Study:
- To present a simple and effective method for determining gait events.
- To enable proper normalization and statistical analysis of gait data.
Main Methods:
- Utilized the relative positioning of the overall center of pressure and an ankle marker.
- Focused on the direction of forward progression to identify gait events.
- Compared results against individual force platform data.
Main Results:
- The new method detected heel-contact events an average of 1 sample (0.00833s at 120Hz) earlier than force platforms.
- Toe-off events were detected an average of 2 samples (0.0167s at 120Hz) earlier than force platforms.
- Demonstrated high accuracy and simplicity in event detection.
Conclusions:
- The presented method offers a novel and straightforward approach to gait event determination.
- It is particularly useful when center of pressure and marker trajectory data are available.
- This technique enhances the reliability of gait data analysis.