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Poststroke consequences upon optimization properties of postural sway during upright stance: a cross-sectional study
Flávia A F Oliveira1, Camilla P Martins1, Laura A S de Oliveira2
1Graduate Program in Rehabilitation Sciences, Centro Universitário Augusto Motta - UNISUAM, Rio de Janeiro, Brazil.
Topics in Stroke Rehabilitation
|October 5, 2022
Summary
Post-stroke individuals with asymmetric weight-bearing and poor balance show altered postural control optimization. This impacts dynamic stability and steadiness, highlighting key areas for rehabilitation strategies.
Area of Science:
- Biomechanics
- Neurorehabilitation
- Systems Neuroscience
Background:
- Human postural control research benefits from optimization process modeling.
- Current models lack analytical descriptors of optimization processes.
- A novel direct search algorithm is employed to study postural optimization in post-stroke individuals.
Purpose of the Study:
- Investigate postural stability optimization in post-stroke individuals.
- Analyze how weight-bearing patterns and balance capability influence postural control.
- Characterize alterations in postural dynamic stability and steadiness post-stroke.
Main Methods:
- Cross-sectional study involving 29 post-stroke and 15 healthy individuals.
- Force platform posturography to collect center-of-pressure data during quiet standing.
- Categorization of post-stroke participants based on weight-bearing (WB) pattern and Berg Balance Scale (BBS) scores.
Main Results:
- Asymmetric WB post-stroke group exhibited faster convergence to postural sway minima.
- Individuals with lower balance capability had smaller sway minima compared to high-balance individuals.
- Significant correlations found between BBS scores and sway minima (r=0.378-0.424, P<0.05).
Conclusions:
- Postural control optimization is altered in post-stroke individuals, particularly those with asymmetric WB and low balance.
- Dynamic stability, steadiness, and global reference properties are affected.
- Findings provide insights into the functional deficits in postural control following stroke.
