Jeong B Y
Department of Industrial Engineering, Hansung University, Seoul, South Korea.
Arch Phys Med Rehabil. 1994 Sep;75(9):951-6.
The representation of postural sway tendency in posturography is important to understand the features of body balance system and a variety of postural disorders. This study is concerned with the contour representation and analysis of postural sway trajectory in posturography. We propose two methodologies to derive the contour of postural sway based on the boundary points of sway area. An algorithm for finding the sway contour in each method was developed, and the experiments were performed to examine the computational efficiency between the methods proposed. Fourteen able-bodied men were asked to stand upright on a force platform to compare the numerical measures of sway shape with other quantitative sway measures used in previous research into balance. The results show that numerical measures of sway contour (area, perimeter, and complexity of sway shape) and radius length diagram can be used to describe the tendency of sway shape, whereas other quantitative sway measures represent the extent of sway amounts.
姿势描记术中姿势摆动倾向的表征对于理解身体平衡系统的特征以及各种姿势障碍非常重要。本研究关注姿势描记术中姿势摆动轨迹的轮廓表征与分析。我们提出了两种基于摆动区域边界点来推导姿势摆动轮廓的方法。针对每种方法开发了一种用于找到摆动轮廓的算法，并进行了实验以检验所提出方法之间的计算效率。邀请了14名身体健全的男性站在测力平台上，将摆动形状的数值测量与先前平衡研究中使用的其他定量摆动测量进行比较。结果表明，摆动轮廓的数值测量（摆动形状的面积、周长和复杂度）以及半径长度图可用于描述摆动形状的倾向，而其他定量摆动测量则表示摆动幅度的大小。
