Walking Stability Using Harmonic Ratios in Parkinson's Disease
Walking Stability Using Harmonic Ratios in Parkinson's Disease
复制标题
DOI：
10.1002/mds.22352
复制
发表时间：
2009-01-30
影响因子：
8.6
通讯作者：
Kerr, John P.
中科院分区：
文献类型：
--
作者：
Lowry, Kristin A.;Smiley-Oyen, Ann L.;Kerr, John P.
帕金森氏病（PD）步态的运动学变化有很好的记录，然而，上身动力学的了解较少。谐波比（HR）测量躯干加速度的节律，可以在垂直、前后和内外侧平面进行检查，提供整体行走稳定性的指示（HR较低表示稳定性较差）。我们研究了PD患者和健康老年人之间HR的差异以及HR和步幅参数之间的关系。11名PD患者和11名老年人以他们喜欢的速度在地面上行走。三轴加速计测量躯干加速度。计算心率和时空参数，并进行标准化，以消除步态速度的影响。PD组在所有三个平面中均表现出较低的HR，其中中外侧和前后平面的差异最明显。更大的步幅时间变异性是最密切相关的，它较低的前-后HR在PD和疾病的存在与mediolateral HR. By证明减少行走稳定性在内侧-外侧和前-后平面，我们得出结论，HR提供独特的信息超出了典型的步幅参数，和步幅时间变异性是最密切相关的全球行走稳定性的这些直接措施。(C)2008运动障碍协会
Kinematic changes in Parkinson's disease (PD) gait are Well documented; however, upper body dynamics are less understood. Harmonic ratios (HRs) measure the rhythm of trunk accelerations and can be examined in the vertical, anterior-posterior, and mediolateral planes, providing an indication of global walking stability (lower HR indicates poorer stability). We examined differences in HRs between persons with PD and healthy older adults and relationships between HRs and stride parameters. Eleven people with PD and I I older adults walked over ground it their preferred pace. A triaxial accelerometer measured trunk accelerations. HRs and spatiotemporal parameters were calculated aid standardized to remove the influence of gait velocity. The PD group exhibited lower HRs in all three planes, with the most pronounced differences in the mediolateral and anterior-posterior planes. Greater stride time variability was most closely associated with it lower anterior-posterior HR in PD and the presence of disease with the mediolateral HR. By demonstrating decreased walking stability in medial-lateral and anterior-posterior planes, we conclude that HRs offer unique information beyond that of typical stride parameters, and stride time variability is most closely associated with these direct measures of global walking stability. (C) 2008 Movement Disorder Society