Noisy galvanic vestibular stimulation effect on center of pressure sway during one-legged standing
Noisy galvanic vestibular stimulation effect on center of pressure sway during one-legged standing
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DOI：
10.1016/j.jocn.2020.10.050
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发表时间：
2020-12-01
影响因子：
2
通讯作者：
Onishi, Hideaki
中科院分区：
文献类型：
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作者：
Inukai, Yasuto;Miyaguchi, Shota;Onishi, Hideaki
噪声前庭电刺激（nGVS）涉及通过双侧放置在乳突上的电极向前庭终末器官及其传入神经施加弱的噪声电流。在静态站立姿势条件下，nGVS期间压力中心（COP）摇摆显示出降低。然而，nGVS是否可以改善静态站立姿势以外的平衡功能仍不清楚。本研究旨在阐明nGVS对单腿站立时COP摇摆的影响。我们将36名参与者随机分配到对照组（假刺激）、0.2 mA组（nGVS为0.2 mA）或0.4 mA组（nGVS为0.4 mA）。所有参与者在刺激前和刺激过程中均测量了单腿站立，睁着眼睛的COP摇摆。在0.2 mA组中，与刺激前相比，刺激期间摇摆路径长度、中外侧平均速度和前后平均速度降低。相反，没有显着差异，在COP摇摆检测到的控制组或0.4 mA组。0.2 mA组的所有COP摇摆参数的刺激效果显著高于对照组或0.4 mA组。这项研究的结果表明，nGVS不仅可以减少静态站立姿势时的COP摆动，而且还可以减少单腿站立时的COP摆动。(C)2020爱思唯尔有限公司保留所有权利。
Noisy galvanic vestibular stimulation (nGVS) involves the application of a weak, noisy, electrical current to the vestibular end organs and their afferent nerves, through electrodes placed bilaterally over the mastoid process. Center of pressure (COP) sway was shown to decrease during nGVS under conditions of static standing posture. However, whether nGVS can improve balance functions other than the static standing posture remains unclear. This study aimed to elucidate the effects of nGVS on COP sway during one-legged standing. We randomly assigned 36 participants to either a control group (sham stimulation), a 0.2 mA group (nGVS at 0.2 mA), or a 0.4 mA group (nGVS at 0.4 mA). All participants were measured for COP sway standing on one leg, with open eyes, both before and during stimulation. In the 0.2 mA group, the sway path length, mediolateral mean velocity, and anteroposterior mean velocity decreased during stimulation compared with before stimulation. Conversely, no significant differences in COP sway were detected for either the control group or the 0.4 mA group. The stimulation effects for all COP sway parameters were significantly higher in the 0.2 mA group than in either the control group or the 0.4 mA group. The results of this study suggested that nGVS not only decreases COP sway during static standing postures but can also reduce COP sway during one-legged standing. (C) 2020 Elsevier Ltd. All rights reserved.