Characteristics of temporal fluctuation of the vertical ground reaction force during quiet stance in Parkinson's disease.
Characteristics of temporal fluctuation of the vertical ground reaction force during quiet stance in Parkinson's disease.
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DOI：
10.1016/j.gaitpost.2011.09.106
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发表时间：
2012-02
期刊：
影响因子：
2.4
通讯作者：
T. Minamisawa;H. Sawahata;K. Takakura;Takashi Yamaguchi
中科院分区：
文献类型：
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作者：
T. Minamisawa;H. Sawahata;K. Takakura;Takashi Yamaguchi
姿势不稳定常见于帕金森病 (PD) 晚期。基于稳定计的压力中心 (COP) 评估是测量姿势控制能力的一种简单、常规的方法。大多数基于稳定计和测力台的直立姿势控制研究都讨论了水平 COP 分量控制。以往关于垂直分量控制的研究较少，也未见基于分形分析的垂直分量控制研究报道。我们的目的是展示神经系统变化和衰老对健康年轻和老年受试者以及帕金森病患者垂直成分的影响以及波动模式行为的差异。采用去趋势波动分析方法研究地面垂直反作用力的波动特征。在三组中，所有标度指数（α、α1、α2）（垂直地面反作用力的时间相关数据）的值均大于 0 且小于 0.5（0<α<0.5）。此外，PD 组和其他组之间的 α 和 α2 存在显着差异。 PD 组和其他组之间在 RMS、最大峰值和方差系数方面观察到显着差异。我们证明帕金森病患者和其他组之间的垂直地面反作用力存在统计学上的显着差异，这表明帕金森病的神经系统影响可能显着反映在垂直地面反作用力中。
Stance instability is seen in late stage Parkinson's disease (PD). Stabilometer-based center-of-pressure (COP) evaluation is an easy, routine method for measuring postural control ability. Most of the stabilometer- and force plate-based studies on upright postural control have discussed horizontal COP component control. Previous studies on vertical component control have been few, and no fractal analysis-based study on the component has been reported. We aimed to show the influence of neurological changes and aging on the vertical component and the difference in fluctuation pattern behavior in healthy young and elderly subjects as well as Parkinsonian patients. Detrended fluctuation analysis was used to study characteristics of fluctuation of vertical ground reaction force. In the three groups, all scaling exponents (α, α1, α2), which are time-correlated data of vertical ground reaction force, had a value >0 and <0.5 (0<α<0.5). Additionally, α and α2 were significantly different between PD and the other groups. Significant differences were observed between PD and the other groups regarding RMS, maximum peak value, and coefficient of variance. We demonstrated statistically significant differences in vertical ground reaction force between Parkinsonian patients and the other groups, suggesting that a neurological influence with PD may be markedly reflected in the vertical ground reaction force.