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Updated: Feb 4, 2026
05:23
Motor Dual-Tasks for Gait Analysis and Evaluation in Post-Stroke Patients
Published on: March 11, 2021
2.9K
Gait Symmetry Assessment with a Low Back 3D Accelerometer in Post-Stroke Patients
Wei Zhang1, Matthew Smuck2,3, Catherine Legault4
1Laboratory of Movement Analysis and Measurement Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland. w.zhang@epfl.ch.
Sensors (Basel, Switzerland)
|October 5, 2018
Summary
A new gait symmetry index (GSI) using a single L3 accelerometer effectively measures post-stroke mobility impairment. This cost-efficient method accurately assesses gait symmetry, aiding research and clinical practice.
Area of Science:
- Biomedical Engineering
- Rehabilitation Science
- Neurology
Background:
- Gait asymmetry is a key indicator of impaired mobility following stroke.
- Current methods for assessing gait symmetry can be complex or require specialized equipment.
Purpose of the Study:
- To introduce and validate a novel gait symmetry index (GSI) using a single 3D accelerometer placed at the L3 vertebra (GSIL3).
- To evaluate the GSIL3's ability to discriminate between post-stroke patients and healthy individuals, and to differentiate between post-stroke patients with and without assistive devices.
Main Methods:
- The GSIL3 was assessed in 16 post-stroke patients and 9 healthy controls during the Six-Minute-Walk-Test (6-MWT).
- Statistical analysis included Wilcoxon tests for discriminative power and Cliff's Delta for effect size (ES) calculation.
- Comparison was made with symmetry indices derived from foot sensors.
Main Results:
- GSIL3 demonstrated comparable and significant effect sizes to existing methods (ES = 0.89, p < 0.001).
- GSIL3 successfully differentiated between post-stroke patients using a cane and those not using one (ES = 0.70, p = 0.02).
- Strong correlations were found between GSIL3 and foot-sensor-derived symmetry indices (|ρ| = [0.82, 0.88], p < 0.05).
Conclusions:
- The proposed GSIL3 is a reliable and cost-efficient tool for assessing gait symmetry in post-stroke individuals.
- This index has significant potential for both research applications and clinical practice in stroke rehabilitation.
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