a Medical Surgical-Therapy Department , Universidad de Extremadura Facultad de Medicina , Badajoz , Spain.
b Departamento de Teoría de la Señal e Ingeniería Telemática , Valladolid University , Valladolid , Spain.
Assist Technol. 2019;31(2):61-67. doi: 10.1080/10400435.2017.1358775. Epub 2017 Sep 5.
The objectives of this study are to determine the displacement of the center of pressure (CoP) and its association with the spectral energy density of the acceleration required for the maintenance of postural balance in different standing positions in healthy participants using design observational and setting laboratorial studies. Participants were 30 healthy university students aged between 18 and 32 years old (mean [M] ± standard deviation [SD] = 21,57 ± 3,31 years). Triaxial accelerometer and a pressure platform were used in order to obtain energy spectral density and CoP sway measurements during four balance tasks. Statistically significant differences were found for anteroposterior (p = 0.002) and mediolateral (p = 0.009) CoP displacement between the conditions eyes closed and stable surface and the conditions eyes closed and unstable surface. A statistically significant correlation was also observed between Z-axis (anterior-posterior) of the accelerometer and mediolateral axis of the CoP (r = 0.465; p = 0.01) and between Y-axis accelerometer (mediolateral) and displacement of the CoP in the anteroposterior axis (r = 0.413; p = 0.023). Spectral energy density appears to be associated with the displacement of CoP in healthy participants.
本研究旨在使用设计观察和实验室设置研究，确定健康参与者在不同站立姿势下维持姿势平衡所需的加速度的中心压力（CoP）位移及其与加速度能谱密度的关系。参与者为 30 名年龄在 18 至 32 岁之间的健康大学生（平均值[M]±标准差[SD]=21.57±3.31 岁）。使用三轴加速度计和压力平台来获得在四项平衡任务期间的能量谱密度和 CoP 摆动测量值。在闭眼和稳定表面与闭眼和不稳定表面两种条件下，前后向（p=0.002）和左右向（p=0.009）CoP 位移存在统计学差异。还观察到加速度计的 Z 轴（前后向）与 CoP 的左右轴（r=0.465；p=0.01）和加速度计的 Y 轴（左右向）与 CoP 在前后向的位移之间存在统计学显著相关性（r=0.413；p=0.023）。在健康参与者中，频谱能量密度似乎与 CoP 的位移有关。
