Gait complexity is acutely restored in older adults when walking to a fractal-like visual stimulus.
Gait complexity is acutely restored in older adults when walking to a fractal-like visual stimulus.
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DOI：
10.1016/j.humov.2020.102677
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发表时间：
2020-12
影响因子：
2.1
通讯作者：
Stergiou N
中科院分区：
文献类型：
--
作者：
Vaz JR;Knarr BA;Stergiou N
通常，步态康复使用不变的刺激模式来改善步态相关的缺陷。然而，这种方法可能不是最佳的，因为它没有考虑步态的复杂性，或者更准确地说，在健康人群中通常观察到的步态波动中发现的可变分形性质。衰老也会影响步态的复杂性，导致对周围环境的适应性丧失，这可能会从包含可变分形刺激范式的步态康复中受益。因此，本研究旨在探讨可变分形视觉刺激对老年人在地上行走时步幅波动的影响。此外，我们的研究旨在通过指示参与者在关闭刺激后继续行走来调查潜在的保留效应。老年人在i)无刺激（自定节奏），ii)可变分形视觉刺激和iii)不变视觉刺激下步行8分钟。在两种视觉刺激条件下，参与者在刺激物关闭后多走了8分钟。通过步幅时间间隔的去趋势波动分析，计算出广泛使用的分形标度指数来评估步态复杂度。我们发现，从无刺激条件到可变分形刺激条件，标度指数显著提高了约20%。然而，当老年人走到不变的刺激时，没有发现差异。观察到的增加趋向于过去发现的健康年轻人的特征值。我们还观察到，即使在分形条件下关闭刺激，这些积极影响也会保留，实际上，会迅速恢复老年人的步态复杂性。这些非常有希望的结果应该激励研究人员和临床医生进行临床试验，以研究视觉可变分形刺激对步态康复的潜力。
Typically, gait rehabilitation uses an invariant stimulus paradigm to improve gait related deficiencies. However, this approach may not be optimal as it does not incorporate gait complexity, or in more precise words, the variable fractal-like nature found in the gait fluctuations commonly observed in healthy populations. Aging which also affects gait complexity, resulting in a loss of adaptability to the surrounding environment, could benefit from gait rehabilitation that incorporates a variable fractal-like stimulus paradigm. Therefore, the present study aimed to investigate the effect of a variable fractal-like visual stimulus on the stride-to-stride fluctuations of older adults during overground walking. Additionally, our study aimed to investigate potential retention effects by instructing the participants to continue walking after turning off the stimulus. Older adults walked 8 min with i) no stimulus (self-paced), ii) a variable fractal-like visual stimulus and iii) an invariant visual stimulus. In the two visual stimuli conditions, the participants walked 8 additional minutes after the stimulus was turned off. Gait complexity was evaluated with the widely used fractal scaling exponent calculated through the detrended fluctuation analysis of the stride time intervals. We found a significant ~20% increase in the scaling exponent from the no stimulus to the variable fractal-like stimulus condition. However, no differences were found when the older adults walked to the invariant stimulus. The observed increase was towards the values found in the past to characterize healthy young adults. We have also observed that these positive effects were retained even when the stimulus was turned off for the fractal condition, practically, acutely restoring gait complexity of older adults. These very promising results should motivate researchers and clinicians to perform clinical trials in order to investigate the potential of visual variable fractal-like stimulus for gait rehabilitation.
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影响因子：
4.6
作者：
Hu K;Riemersma-van der Lek RF;Patxot M;Li P;Shea SA;Scheer FA;Van Someren EJ
通讯作者：
Van Someren EJ
影响因子：
2.9
作者：
Anteneodo, C.;Chialvo, D. R.
通讯作者：
Chialvo, D. R.
影响因子：
3.3
作者：
Hausdorff, JM;Purdon, PL;Goldberger, AL
通讯作者：
Goldberger, AL
影响因子：
168.9
作者：
Goldberger, AL
通讯作者：
Goldberger, AL
影响因子：
3.8
作者：
Kaipust, Jeffrey P.;McGrath, Denise;Stergiou, Nicholas
通讯作者：
Stergiou, Nicholas