School of Kinesiology, University of Minnesota, United States.
Gait Posture. 2012 Jul;36(3):605-8. doi: 10.1016/j.gaitpost.2012.05.027. Epub 2012 Jun 28.
Research has shown that the Nintendo Wii Balance Board (WBB) can reliably detect the quantitative kinematics of the center of pressure in stance. Previous studies used relatively coarse manipulations (1- vs. 2-leg stance, and eyes open vs. closed). We sought to determine whether the WBB could reliably detect postural changes associated with subtle variations in visual tasks. Healthy elderly adults stood on a WBB while performing one of two visual tasks. In the Inspection task, they maintained their gaze within the boundaries of a featureless target. In the Search task, they counted the occurrence of designated target letters within a block of text. Consistent with previous studies using traditional force plates, the positional variability of the center of pressure was reduced during performance of the Search task, relative to movement during performance of the Inspection task. Using detrended fluctuation analysis, a measure of movement dynamics, we found that COP trajectories were more predictable during performance of the Search task than during performance of the Inspection task. The results indicate that the WBB is sensitive to subtle variations in both the magnitude and dynamics of body sway that are related to variations in visual tasks engaged in during stance. The WBB is an inexpensive, reliable technology that can be used to evaluate subtle characteristics of body sway in large or widely dispersed samples.
研究表明，任天堂 Wii 平衡板（WBB）可以可靠地检测到站立时的压力中心的定量运动学。以前的研究使用了相对粗糙的操作（单腿与双腿站立，睁眼与闭眼）。我们试图确定 WBB 是否可以可靠地检测与视觉任务细微变化相关的姿势变化。健康的老年人站在 WBB 上，同时执行两项视觉任务中的一项。在检查任务中，他们保持注视在无特征目标的边界内。在搜索任务中，他们在文本块中计数指定目标字母的出现次数。与使用传统测力板的先前研究一致，与执行检查任务期间的运动相比，在执行搜索任务期间，压力中心的位置可变性降低。使用去趋势波动分析，一种衡量运动动态的方法，我们发现 COP 轨迹在执行搜索任务时比在执行检查任务时更可预测。结果表明，WBB 对与站立时参与的视觉任务相关的身体摆动的幅度和动态的细微变化敏感。WBB 是一种廉价、可靠的技术，可用于评估大样本或广泛分散样本中身体摆动的细微特征。
