Evaluation of postural stability based on a force plate and inertial sensor during static balance measurements
Abstract Background Previous research on balance mostly focused on the assessment, training, and improvements of balance through interventions. We investigated tools commonly used to study static balance. Differences in postural stability were analyzed using multiscale entropy (MSE) and feature anal...
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| Format: | Article |
| Language: | English |
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BMC
2018-12-01
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| Series: | Journal of Physiological Anthropology |
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| Online Access: | http://link.springer.com/article/10.1186/s40101-018-0187-5 |
| _version_ | 1818043471217295360 |
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| author | Chia-Hsuan Lee Tien-Lung Sun |
| author_facet | Chia-Hsuan Lee Tien-Lung Sun |
| author_sort | Chia-Hsuan Lee |
| collection | DOAJ |
| description | Abstract Background Previous research on balance mostly focused on the assessment, training, and improvements of balance through interventions. We investigated tools commonly used to study static balance. Differences in postural stability were analyzed using multiscale entropy (MSE) and feature analysis. Methods A force plate and inertial sensor were used to collect acceleration and center-of-pressure (COP) nonlinear signals. MSE was also used to detect fractal correlations and assess the complexity of univariate data complexity. Fifteen healthy subjects participated in the experiments. Each stood on a force plate and wore a sensor while attempting to maintain postural stability for 30 s in four randomized experiments to evaluate their static balance via a copositive experiment with eyes open/closed and with standing on one foot or both feet. A Wilcoxon-signed rank test was used to confirm that the conditions were significant. Considering the effect of the assessment tools, the influence of the visual and lower limb systems on postural stability was assessed and the results from the inertial sensor and force plate experiments were compared. Results Force plate usage provided more accurate readings when completing static balance tasks based on the visual system, whereas an inertial sensor was preferred for lower-limb tasks. Further, the eyes-open-standing-on-one-foot case involved the highest complexity at the X, Y, and Z axes for acceleration and at the ML axis for COP compared with other conditions, from which the axial directions can be identified. Conclusions The findings suggested investigation of different evaluation tool choices that can be easily adapted to suit different needs. The results for the complexity index and traditional balance indicators were comparable in their implications on different conditions. We used MSE to determine the equipment that measures the postural stability performance. We attempted to generalize the applications of complexity index to tasks and training characteristics and explore different tools to obtain different results. Trial registration This study was approved by the Research Ethics Committee of National Taiwan University and classified as expedited on August 24, 2017. The committee is organized under and operates in accordance with Social and Behavioral Research Ethical Principles and Regulations of National Taiwan University and government laws and regulations. |
| first_indexed | 2024-12-10T09:02:44Z |
| format | Article |
| id | doaj.art-23d2e6efce224bdb87efe3b1fc74d158 |
| institution | Directory Open Access Journal |
| issn | 1880-6805 |
| language | English |
| last_indexed | 2024-12-10T09:02:44Z |
| publishDate | 2018-12-01 |
| publisher | BMC |
| record_format | Article |
| series | Journal of Physiological Anthropology |
| spelling | doaj.art-23d2e6efce224bdb87efe3b1fc74d1582022-12-22T01:55:14ZengBMCJournal of Physiological Anthropology1880-68052018-12-0137111610.1186/s40101-018-0187-5Evaluation of postural stability based on a force plate and inertial sensor during static balance measurementsChia-Hsuan Lee0Tien-Lung Sun1Department of Industrial Management, National Taiwan University of Science and TechnologyDepartment of Industrial Engineering and Management, Yuan Ze UniversityAbstract Background Previous research on balance mostly focused on the assessment, training, and improvements of balance through interventions. We investigated tools commonly used to study static balance. Differences in postural stability were analyzed using multiscale entropy (MSE) and feature analysis. Methods A force plate and inertial sensor were used to collect acceleration and center-of-pressure (COP) nonlinear signals. MSE was also used to detect fractal correlations and assess the complexity of univariate data complexity. Fifteen healthy subjects participated in the experiments. Each stood on a force plate and wore a sensor while attempting to maintain postural stability for 30 s in four randomized experiments to evaluate their static balance via a copositive experiment with eyes open/closed and with standing on one foot or both feet. A Wilcoxon-signed rank test was used to confirm that the conditions were significant. Considering the effect of the assessment tools, the influence of the visual and lower limb systems on postural stability was assessed and the results from the inertial sensor and force plate experiments were compared. Results Force plate usage provided more accurate readings when completing static balance tasks based on the visual system, whereas an inertial sensor was preferred for lower-limb tasks. Further, the eyes-open-standing-on-one-foot case involved the highest complexity at the X, Y, and Z axes for acceleration and at the ML axis for COP compared with other conditions, from which the axial directions can be identified. Conclusions The findings suggested investigation of different evaluation tool choices that can be easily adapted to suit different needs. The results for the complexity index and traditional balance indicators were comparable in their implications on different conditions. We used MSE to determine the equipment that measures the postural stability performance. We attempted to generalize the applications of complexity index to tasks and training characteristics and explore different tools to obtain different results. Trial registration This study was approved by the Research Ethics Committee of National Taiwan University and classified as expedited on August 24, 2017. The committee is organized under and operates in accordance with Social and Behavioral Research Ethical Principles and Regulations of National Taiwan University and government laws and regulations.http://link.springer.com/article/10.1186/s40101-018-0187-5Static balanceForce plateInertial sensorMultiscale entropy |
| spellingShingle | Chia-Hsuan Lee Tien-Lung Sun Evaluation of postural stability based on a force plate and inertial sensor during static balance measurements Journal of Physiological Anthropology Static balance Force plate Inertial sensor Multiscale entropy |
| title | Evaluation of postural stability based on a force plate and inertial sensor during static balance measurements |
| title_full | Evaluation of postural stability based on a force plate and inertial sensor during static balance measurements |
| title_fullStr | Evaluation of postural stability based on a force plate and inertial sensor during static balance measurements |
| title_full_unstemmed | Evaluation of postural stability based on a force plate and inertial sensor during static balance measurements |
| title_short | Evaluation of postural stability based on a force plate and inertial sensor during static balance measurements |
| title_sort | evaluation of postural stability based on a force plate and inertial sensor during static balance measurements |
| topic | Static balance Force plate Inertial sensor Multiscale entropy |
| url | http://link.springer.com/article/10.1186/s40101-018-0187-5 |
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