老年人从坐到站过程中局部躯体感觉刺激对姿势摆动的影响。
Effect of local somatosensory stimulus on postural sway during sit-to-stand movement in the elderly.
机构信息
Department of Healthcare Engineering, Graduate School, Jeonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, Republic of Korea.
Division of Biomedical Engineering, College of Engineering, Jeonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, Republic of Korea.
出版信息
BMC Musculoskelet Disord. 2021 Nov 12;22(Suppl 1):731. doi: 10.1186/s12891-021-04609-7.
BACKGROUND
Sit-to-stand (STS) is a complex movement that requires successful postural control. Aging is a normal part of human life that leads to weakness of sensory capabilities, resulting in diminished postural control. Therefore, STS movement is a challenging task for the elderly. Local tendon vibration (LTV) can be utilized to assist STS of the elderly by improving postural control. Many studies have revealed that the LTV has various physiological positive effect. However, previous studies did not consider subjects' individual difference for properties of applied LTV. Also, there are almost no studies to assist and to improve elder's STS movement. Thus, the purpose of this study was to examine the influence of lower limb LTV on postural sway during STS in the elderly, and to examine whether a specific vibration frequency can increase postural control in the elderly.
RESULTS
The common characteristic differences between the elderly and younger population during STS movement were analyzed. In addition, the effect of vibration on the center of mass (COM) and the center of pressure (COP) variable responses in young adults and the elderly were investigated. As a result, the elderly exhibit larger COP sway area and higher COP mediolateral (ML) displacement than the young adults. In addition, the elderly generally have lower COM velocities in all directions compared to the young adults. It was found that COP and COM related to postural stability are affected when LTV of the 180 Hz, 190 Hz and 250 Hz is applied to the elderly. Particularly, the 190 Hz vibration induced significant reduction in COP sway area and COP ML displacement.
CONCLUSIONS
These results mean that the LTV contributes to stability of elders' STS movement by reducing postural sway. Furthermore, a reduction of postural sway depends on frequency of the LTV. These findings suggest that individual response to characteristics of vibration must be considered, and imply that the LTV can be used as rehabilitation therapy to improve postural control in the elderly, and utilized in motion assistive devices to deliver apt vibration frequencies.
TRIAL REGISTRATION
CRIS, KCT0005434 , Registered 25 September 2020, Retrospectively registered, https://cris.nih.go.kr/cris/index/index.do.
背景
坐站（STS）是一项复杂的运动，需要成功的姿势控制。衰老是人一生中的正常现象，会导致感觉能力减弱，从而导致姿势控制能力下降。因此，STS 运动对老年人来说是一项具有挑战性的任务。局部肌腱振动（LTV）可用于通过改善姿势控制来辅助老年人进行 STS。许多研究表明，LTV 具有各种生理积极影响。然而，以前的研究没有考虑到受试者个体差异对应用 LTV 的特性。此外，几乎没有研究来辅助和改善老年人的 STS 运动。因此，本研究旨在探讨下肢 LTV 对老年人 STS 时姿势摆动的影响，并探讨特定振动频率是否可以增加老年人的姿势控制能力。
结果
分析了 STS 运动中老年人与年轻人群之间的共同特征差异。此外，还研究了振动对年轻成年人和老年人的质心（COM）和压力中心（COP）变量响应的影响。结果表明，老年人的 COP 摆动面积和 COP 横向（ML）位移大于年轻人。此外，与年轻人相比，老年人在所有方向上的 COM 速度普遍较低。结果发现，当对老年人施加 180 Hz、190 Hz 和 250 Hz 的 LTV 时，与姿势稳定性相关的 COP 和 COM 会受到影响。特别是，190 Hz 的振动会显著降低 COP 摆动面积和 COP ML 位移。
结论
这些结果意味着 LTV 通过减少姿势摆动有助于老年人 STS 运动的稳定性。此外，姿势摆动的减少取决于 LTV 的频率。这些发现表明，必须考虑个体对振动特性的反应，并暗示 LTV 可作为改善老年人姿势控制的康复治疗方法，并可用于运动辅助设备以提供合适的振动频率。
试验注册
CRIS，KCT0005434，注册于 2020 年 9 月 25 日，回顾性注册，https://cris.nih.go.kr/cris/index/index.do。
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