Verification of criterion-related validity of the evaluation method of postural stability using the frame subtraction method
Verification of criterion-related validity of the evaluation method of postural stability using the frame subtraction method
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DOI：
10.1016/j.jbiomech.2020.109958
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发表时间：
2020-08-26
影响因子：
2.4
通讯作者：
Ichihashi, Noriaki
中科院分区：
文献类型：
--
作者：
Ota, Megumi;Tateuchi, Hiroshige;Ichihashi, Noriaki
对体位稳定性进行量化是很重要的。帧减法可以计算对象的运动，并且可能更容易实现，成本更低。然而，使用该方法评估体位稳定性的有效性尚未得到验证。因此，本研究的目的是验证框架减法评分和压力中心（COP）参数在单腿站立维持过程中的效度。22名健康青年受试者参加了本研究。运动任务包括睁眼和闭眼右腿站立。使用测力板记录COP移位总长度（LNG）、均方根（RMS）面积、前后（AP）范围、内外侧（ML）范围。同时，用数码摄像机从前方和右侧采集运动图像。采用帧减法对运动图像进行分析后，测量帧减法得分（各平面/正面和矢状面帧减法得分的最大值/总和）。为了验证有效性，计算帧减法得分与COP参数之间的Spearman等级相关系数。在单腿站立时，正面的框架减法得分总和与所有COP位移显著相关。本研究结果表明，框架减法可用于评估单腿站立等具有姿势摇摆的平衡任务。框架减法由于其无标记系统，成本低，操作简单。(C) 2020 Elsevier Ltd.版权所有。
It is important to quantify the postural stability. The frame subtraction method can calculate the motions of a subject, and might be easier to implement, with lower costs. However, validity of the evaluation of postural stability using this method have not been validated yet. Therefore, the purpose of this study was to verify criterion-related validity of the frame subtraction scores and the center of pressure (COP) parameters during maintenance of single leg standing.Twenty two healthy young subjects participated in this study. Motion tasks comprised right leg standing with eyes open and closed. The total length of COP displacements (LNG), Root mean square (RMS) area, anterior - posterior (AP) range, medial - lateral (ML) range were recorded using the force plate. Simultaneously, the motion images were acquired with digital video cameras from the front and right sides. After the motion images were analyzed using the frame subtraction method, the frame subtraction scores (maximum / sum of the frame subtraction score on each plane / the frontal and sagittal planes) were measured. To confirm the validity, Spearman's rank correlation coefficient between the frame subtraction scores and the COP parameters was calculated.The sum of the frame subtraction score on the frontal plane was significantly correlated with all COP displacements in the single leg standing. The result of this study indicated that the frame subtraction method could be applied to the evaluation of balance task with postural sway such as maintenance of single leg standing. The frame subtraction method is low cost and easy owing to its marker-less systems. (C) 2020 Elsevier Ltd. All rights reserved.