Development of Visual Feedback Training Using Functional Electrical Stimulation Therapy for Balance Rehabilitation
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Résumé
Individuals with incomplete spinal cord injuries (iSCI) often experience impairments in motor control of lower-limb muscles, causing a lack of balance when standing. These individuals are usually heavily dependent on others, reducing their self-sufficiency and quality of life. Our previous study has shown that visual feedback training (VFT) of tracking an individual’s center of pressure (COP) can improve balance stability of those with iSCI (1). Another of our previous studies demonstrated that functional electrical stimulation (FES) augments therapeutic effects in general (2-8). Thus, VFT in combination with FES is hypothesized to improve the standing balance ability of individuals with iSCI more effectively than a VFT or FES system. The purpose of this study was to develop a novel therapeutic system by combining VFT with FES. We developed this system by utilizing LabVIEW (17.0, National Instruments Corp., Austin, USA). The system hardware consisted of a force plate, an electrical stimulator, and a computer. The COP was calculated using the force plate signals, which was displayed in the monitor in front of the participant. We developed four COP-based games, each forcing the participant to shift their COP in various movement patterns. FES will provide electrical stimulation to participant plantarflexors and dorsiflexors to assist with movements, in which stimulus intensity will be modulated through a proportionalderivative (PD) feedback controller that mimics the physiological control system for standing (9,10). In this study, we tested the practicality of our VFT games with seven able-bodied participants (age 19-24 years). Each participant performed a balance assessment before playing the VFT games to determine their balance ability. Our focus was on developing effective VFT games and assessing each participant’s balance ability against their VFT game scores. Three out of four games showed a significant bivariate correlation between balance ability and VFT scores (r > 0.754 for n=7), indicating that the games were appropriately designed. The validity of the FES controller was demonstrated in another study to be effective. The parameters of the PD controller were optimized so that the stimulation intensity would match the natural muscle contraction of the plantarflexors and dorsiflexors, acquired through electromyography (EMG) signals. It is expected that rehabilitation combining VFT with FES will improve static and dynamic balance stability in a more effective way than isolated therapy techniques. Since this study has shown the validity of our VFT games, we would like to integrate the VFT and FES systems and run clinical trials on patients with iSCI, with the goal of improving their balance ability in the future. Through visual feedback training, the brain improves spatial awareness by visualizing their body displacement and orientation. Applying stimulation to the muscles re-trains the central nervous system and, over time, allows patients with iSCI to partially regain motor control. Thus, the proposed system will help individuals with iSCI improve their balance ability and increase their quality of life.
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Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,001 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
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