Gait Variability is Altered in Older Adults When Listening to Auditory Stimuli with Differing Temporal Structures
Gait Variability is Altered in Older Adults When Listening to Auditory Stimuli with Differing Temporal Structures
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DOI：
10.1007/s10439-012-0654-9
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发表时间：
2013-08-01
影响因子：
3.8
通讯作者：
Stergiou, Nicholas
中科院分区：
文献类型：
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作者：
Kaipust, Jeffrey P.;McGrath, Denise;Stergiou, Nicholas
确定性动态系统背景下的步态变异性可以使用表征系统复杂性的非线性时间序列分析来量化。病理步态表现出步态变异性的改变。它要么过于周期性和可预测，要么过于随机和无序，就像衰老的情况一样。虽然步态治疗通常侧重于恢复线性测量，例如步态速度或步长，但我们建议步态治疗的目标应该是恢复最佳步态变异性，这种变异性表现出混沌波动，是可预测性和复杂性之间的平衡。在这种情况下，我们的目的是研究聆听不同的听觉刺激如何影响步态变异性。 27 名年轻人和 27 名老年人受试者在跑步机上行走 5 分钟，同时听着白噪音、混乱的节奏、节拍器，并且没有任何听觉刺激。计算所有条件下的步长、步宽和步幅间隔。然后对这些时间序列进行去趋势波动分析。二次趋势分析确定，理想化的倒 U 形描述了老年组步态变异性与听觉刺激结构之间的关系，但不适用于年轻组。这项概念验证研究表明，老年人的步态可以通过听觉刺激来控制。未来的工作将调查哪些听觉刺激结构可以改善老年人的功能状态。
Gait variability in the context of a deterministic dynamical system may be quantified using nonlinear time series analyses that characterize the complexity of the system. Pathological gait exhibits altered gait variability. It can be either too periodic and predictable, or too random and disordered, as is the case with aging. While gait therapies often focus on restoration of linear measures such as gait speed or stride length, we propose that the goal of gait therapy should be to restore optimal gait variability, which exhibits chaotic fluctuations and is the balance between predictability and complexity. In this context, our purpose was to investigate how listening to different auditory stimuli affects gait variability. Twenty-seven young and 27 elderly subjects walked on a treadmill for 5 min while listening to white noise, a chaotic rhythm, a metronome, and with no auditory stimulus. Stride length, step width, and stride intervals were calculated for all conditions. Detrended Fluctuation Analysis was then performed on these time series. A quadratic trend analysis determined that an idealized inverted-U shape described the relationship between gait variability and the structure of the auditory stimuli for the elderly group, but not for the young group. This proof-of-concept study shows that the gait of older adults may be manipulated using auditory stimuli. Future work will investigate which structures of auditory stimuli lead to improvements in functional status in older adults.