Age-associated increase in postural variability relate to greater low-frequency center of pressure oscillations.
Age-associated increase in postural variability relate to greater low-frequency center of pressure oscillations.
复制标题
与年龄相关的姿势变异性的增加与更大的压力振荡的低频中心有关。
DOI：
10.1016/j.gaitpost.2020.12.019
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发表时间：
2021-03
期刊：
影响因子：
2.4
通讯作者：
Christou EA
中科院分区：
文献类型：
--
作者：
Delmas S;Watanabe T;Yacoubi B;Christou EA
老年人的姿势控制能力受损，这可以从姿势任务期间压力中心（COP）的更大变异性中得到证明。尽管年轻人的COP变异性与低频COP振荡（<1 Hz）相关，但年龄相关的COP变异性增加是否与更大的低频COP振荡相关仍不清楚。与年轻人相比，当老年人试图自愿保持前倾姿势时，低频振荡是否会导致更大的姿势摇摆（压力中心（COP）变异性）？7名年轻人（25.7 ± 4.8）和7名老年人（71.0 ± 7.0）进行姿势前倾任务，并试图在前后方向上尽可能稳定地匹配COP目标。我们将COP变异性量化为前后和内外方向上COP位移的标准差（SD），并将COP的频率调制量化为0-1 Hz COP位移谱中的功率。我们发现，老年人的COP（p = 0.027）和0.5 Hz以下的功率（p = 0.048）的前后SD显著大于年轻人，但0.5-1 Hz的功率相似（p = 0.083）。相反，两个年龄组的COP（p = 0.5）和0-1 Hz功率（p=0.228）的内外侧SD相似。无论是前后方向还是内外方向，COP的SD都与0.5Hz以下的低频振荡有关。这是第一次，我们表明，年龄相关的姿势变异性增加涉及到更大的COP振荡低于0.5 Hz。
Postural control is impaired in older adults, as evidenced from greater variability of the center of pressure (COP) during postural tasks. Although COP variability associates with low-frequency COP oscillations (<1 Hz) in young adults, it remains unknown if the age-associated increase in COP variability relates to greater low-frequency COP oscillations. Do low-frequency oscillations contribute to greater postural sway (center of pressure (COP) variability) in older adults when attempting to voluntarily maintain posture in a forward leaning position compared to young adults? Seven young (25.7 ± 4.8) and seven older (71.0 ± 7.0) adults performed a postural lean forward task and attempted to match a COP target in the anterior-posterior direction as steady as possible. We quantified the COP variability as the standard deviation (SD) of COP displacements in the anterior-posterior and medial-lateral directions and quantified the frequency modulation of COP as the power in COP displacement spectra from 0–1 Hz. We found that older adults had significantly greater anterior-posterior SD of COP (p = 0.027) and power below 0.5 Hz (p = 0.048) than young adults, but power from 0.5–1 Hz was similar (p = 0.083). In contrast, the medial-lateral SD of COP (p = 0.5) and power from 0–1 Hz (p=0.228) was similar for the two age groups. For both the anterior-posterior and medial-lateral direction, the SD of COP was related to low frequency oscillations below 0.5 Hz. For the first time, we show that the age-associated increase in postural variability relates to greater COP oscillations below 0.5 Hz.
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影响因子：
3.7
作者：
Oliveira MR;Vieira ER;Gil AWO;Fernandes KBP;Teixeira DC;Amorim CF;da Silva RA
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