Long-range cross-correlations between center of pressure velocity and colored noises provided during quiet standing

IF 2.5 4区医学 Q3 NEUROSCIENCES

Neuroscience Letters Pub Date : 2024-10-05 DOI:10.1016/j.neulet.2024.138008

Momoko Yamagata , Ken Kiyono , Tetsuya Kimura

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引用次数: 0

Abstract

Unperceivable electrical noise stimulation has been applied to improve postural control through the enhancement of somatosensory feedback. It has been observed that stimulation with a pink noise (1/f) structure is more effective than stimulation with other noise structures. In addition, the 1/f structure embedded in the postural control system may have a superior effect on postural control stabilization. However, the direct relationship between the long-range correlations of the pink-noise signal applied to somatosensory receptors and those of the postural control system has not been elucidated. Thus, we aimed to explore a common long-range correlation factor shared in the time series of the provided noise and foot center of pressure (CoP) during quiet standing. Sixteen young adults stood quietly on the force platform for 65 s. Four noise conditions (no stimulation and stimulation of knee joints with white-, pink-, and red-noise-like signals) were employed during the standing trials. The detrending moving-average cross-correlation analysis revealed that in each of the anteroposterior and mediolateral directions, the CoP velocity time series displayed significant long-range cross-correlations with the white and pink noise signals provided at that time, whereas such an effect was not observed in the red noise signal. This result indicates that pink and white noise signals would alter the temporal behavior of the CoP during quiet standing, although the mechanism remains to be elucidated.

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压力中心速度与安静站立时发出的彩色噪音之间的远距离交叉相关性。

不可感知的电噪声刺激已被用于通过增强体感反馈来改善姿势控制。据观察，粉红噪声（1/f）结构的刺激比其他噪声结构的刺激更有效。此外，嵌入姿势控制系统中的 1/f 结构可能对姿势控制的稳定有更好的效果。然而，应用于体感受体的粉红噪声信号的长程相关性与姿势控制系统的长程相关性之间的直接关系尚未阐明。因此，我们的目的是探索在安静站立时，所提供的噪声和足部压力中心（CoP）的时间序列中是否存在共同的长程相关因子。16 名年轻人在受力平台上安静站立了 65 秒。在站立试验中采用了四种噪音条件（无刺激和用白色、粉色和红色类似噪音的信号刺激膝关节）。去趋势移动平均交叉相关分析表明，在前胸和内外侧方向上，CoP 速度时间序列与当时提供的白色和粉色噪声信号显示出明显的长程交叉相关，而在红色噪声信号中则没有观察到这种效应。这一结果表明，粉红和白噪声信号会改变安静站立时 CoP 的时间行为，但其机制仍有待阐明。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Neuroscience Letters 医学-神经科学

CiteScore

5.20

自引率

0.00%

发文量

408

审稿时长

50 days

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