Change in sensory integration and regularity of postural sway with the suspensory strategy during static standing balance
Background and aimThe suspensory strategy, a method for controlling postural balance in the vertical direction of the center of mass (COM), is considered by the elderly as a means of balance control. The vertical COM control might alter the sensory integration and regularity of postural sway, which...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-10-01
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| Series: | Frontiers in Neurology |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fneur.2023.1290986/full |
| _version_ | 1797644377184534528 |
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| author | Linjing Jiang Satoshi Kasahara Tomoya Ishida Yuta Koshino Ami Chiba Kazumasa Yoshimi Yuting Wei Mina Samukawa Harukazu Tohyama |
| author_facet | Linjing Jiang Satoshi Kasahara Tomoya Ishida Yuta Koshino Ami Chiba Kazumasa Yoshimi Yuting Wei Mina Samukawa Harukazu Tohyama |
| author_sort | Linjing Jiang |
| collection | DOAJ |
| description | Background and aimThe suspensory strategy, a method for controlling postural balance in the vertical direction of the center of mass (COM), is considered by the elderly as a means of balance control. The vertical COM control might alter the sensory integration and regularity of postural sway, which in turn impacts balance. However, to date, this was not confirmed. Thus, this study aimed at investigating the influence of the suspensory strategy achieved through knee flexion on the static standing balance.MethodsNineteen participants were monitored at knee flexion angles of 0°, 15°, and 65°. Time-frequency analysis and sample entropy were employed to analyze the COM data. Time-frequency analysis was utilized to assess the energy content across various frequency bands and corresponding percentage of energy within each frequency band. The outcomes of time-frequency are hypothesized to reflect the balance-related sensory input and sensory weights. Sample entropy was applied to evaluate the regularity of the COM displacement patterns.ResultsKnee flexion led to a decreased COM height. The highest energy content was observed at 65° knee flexion, in contrast with the lowest energy observed at 0° in both the anterior–posterior (AP) and medial-lateral (ML) directions. Additionally, the ultra-low-frequency band was more pronounced at 65° than that at 0° or 15° in the ML direction. Furthermore, the COM amplitudes were notably higher at 65° than those at 0° and 15° in the AP and ML directions, respectively. The sample entropy values were lower at 65° and 15° than those at 0° in the ML direction, with the lowest value observed at 65° in the vertical direction.ConclusionThe suspensory strategy could enhance the sensory input and cause sensory reweighting, culminating in a more regular balance control. Such suspensory strategy-induced postural control modifications may potentially provide balance benefits for people with declining balance-related sensory, central processing, and musculoskeletal system functions. |
| first_indexed | 2024-03-11T14:29:39Z |
| format | Article |
| id | doaj.art-e4950ecae5f947fca155cd62332f1d9d |
| institution | Directory Open Access Journal |
| issn | 1664-2295 |
| language | English |
| last_indexed | 2024-03-11T14:29:39Z |
| publishDate | 2023-10-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Neurology |
| spelling | doaj.art-e4950ecae5f947fca155cd62332f1d9d2023-10-31T10:52:42ZengFrontiers Media S.A.Frontiers in Neurology1664-22952023-10-011410.3389/fneur.2023.12909861290986Change in sensory integration and regularity of postural sway with the suspensory strategy during static standing balanceLinjing Jiang0Satoshi Kasahara1Tomoya Ishida2Yuta Koshino3Ami Chiba4Kazumasa Yoshimi5Yuting Wei6Mina Samukawa7Harukazu Tohyama8Department of Rehabilitation Sciences, Graduate School of Health Sciences, Hokkaido University, Sapporo, JapanDepartment of Rehabilitation Sciences, Faculty of Health Sciences, Hokkaido University, Sapporo, JapanDepartment of Rehabilitation Sciences, Faculty of Health Sciences, Hokkaido University, Sapporo, JapanDepartment of Rehabilitation Sciences, Faculty of Health Sciences, Hokkaido University, Sapporo, JapanDepartment of Rehabilitation, Hirosaki University Hospital, Hirosaki, JapanDepartment of Rehabilitation Sciences, Graduate School of Health Sciences, Hokkaido University, Sapporo, JapanDepartment of Rehabilitation Sciences, Graduate School of Health Sciences, Hokkaido University, Sapporo, JapanDepartment of Rehabilitation Sciences, Faculty of Health Sciences, Hokkaido University, Sapporo, JapanDepartment of Rehabilitation Sciences, Faculty of Health Sciences, Hokkaido University, Sapporo, JapanBackground and aimThe suspensory strategy, a method for controlling postural balance in the vertical direction of the center of mass (COM), is considered by the elderly as a means of balance control. The vertical COM control might alter the sensory integration and regularity of postural sway, which in turn impacts balance. However, to date, this was not confirmed. Thus, this study aimed at investigating the influence of the suspensory strategy achieved through knee flexion on the static standing balance.MethodsNineteen participants were monitored at knee flexion angles of 0°, 15°, and 65°. Time-frequency analysis and sample entropy were employed to analyze the COM data. Time-frequency analysis was utilized to assess the energy content across various frequency bands and corresponding percentage of energy within each frequency band. The outcomes of time-frequency are hypothesized to reflect the balance-related sensory input and sensory weights. Sample entropy was applied to evaluate the regularity of the COM displacement patterns.ResultsKnee flexion led to a decreased COM height. The highest energy content was observed at 65° knee flexion, in contrast with the lowest energy observed at 0° in both the anterior–posterior (AP) and medial-lateral (ML) directions. Additionally, the ultra-low-frequency band was more pronounced at 65° than that at 0° or 15° in the ML direction. Furthermore, the COM amplitudes were notably higher at 65° than those at 0° and 15° in the AP and ML directions, respectively. The sample entropy values were lower at 65° and 15° than those at 0° in the ML direction, with the lowest value observed at 65° in the vertical direction.ConclusionThe suspensory strategy could enhance the sensory input and cause sensory reweighting, culminating in a more regular balance control. Such suspensory strategy-induced postural control modifications may potentially provide balance benefits for people with declining balance-related sensory, central processing, and musculoskeletal system functions.https://www.frontiersin.org/articles/10.3389/fneur.2023.1290986/fullsensory integrationsensory inputsensory weightstime-frequency analysispostural regularitysample entropy |
| spellingShingle | Linjing Jiang Satoshi Kasahara Tomoya Ishida Yuta Koshino Ami Chiba Kazumasa Yoshimi Yuting Wei Mina Samukawa Harukazu Tohyama Change in sensory integration and regularity of postural sway with the suspensory strategy during static standing balance Frontiers in Neurology sensory integration sensory input sensory weights time-frequency analysis postural regularity sample entropy |
| title | Change in sensory integration and regularity of postural sway with the suspensory strategy during static standing balance |
| title_full | Change in sensory integration and regularity of postural sway with the suspensory strategy during static standing balance |
| title_fullStr | Change in sensory integration and regularity of postural sway with the suspensory strategy during static standing balance |
| title_full_unstemmed | Change in sensory integration and regularity of postural sway with the suspensory strategy during static standing balance |
| title_short | Change in sensory integration and regularity of postural sway with the suspensory strategy during static standing balance |
| title_sort | change in sensory integration and regularity of postural sway with the suspensory strategy during static standing balance |
| topic | sensory integration sensory input sensory weights time-frequency analysis postural regularity sample entropy |
| url | https://www.frontiersin.org/articles/10.3389/fneur.2023.1290986/full |
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