Weak magnetic vestibular stimulation decreases postural sway

IF 2.5 4区医学 Q3 NEUROSCIENCES Neuroscience Letters Pub Date : 2024-07-10 DOI:10.1016/j.neulet.2024.137891

Kunihiko Tanaka , Akihiro Sugiura

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Abstract

Background

Perceptible galvanic vestibular stimulation (GVS) causes nystagmus and postural sway deterioration. Conversely, imperceptible GVS improves postural stability, suggesting the presence of stochastic resonance.

Research question

Similar to GVS, strong magnetic vestibular stimulation of 7 T induces nystagmus and increases body sway. Thus, a relatively small magnetic stimulation may improve postural stability. In this study, we measured the effect of a relatively small magnetic field on postural sway.

Methods

Posturography was performed in eight healthy participants using a stabilometer with foam rubber on board. The center of pressure (COP) trajectories were recorded in both the anterior–posterior and medial–lateral directions for 60 s with the eye closed. Neodymium magnets (0.4 T) or aluminum disks of similar size (0 T) were placed bilaterally over the mastoid processes.

Results

Both the trajectory length and envelopment area of the COP movement with 0.4 T were significantly smaller than those with 0 T.

Significance

The relatively smaller magnetic vestibular stimulation decreased postural sway. This method may be useful for improving the vestibular function and related reflexes.

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弱磁性前庭刺激可减少姿势摇摆。

背景：可感知的电前庭刺激（GVS）会导致眼球震颤和姿势摇摆恶化。相反，不可感知的电前庭刺激会提高姿势稳定性，这表明随机共振的存在：研究问题：与 GVS 相似，7 T 的强磁前庭刺激会诱发眼球震颤并增加身体摇摆。因此，相对较小的磁刺激可能会改善姿势稳定性。在这项研究中，我们测量了相对较小的磁场对姿势摇摆的影响：方法：使用板上装有泡沫橡胶的稳定计对 8 名健康参与者进行体位测量。闭眼 60 秒后，记录前后和内外侧方向的压力中心（COP）轨迹。将钕磁铁（0.4 T）或类似大小的铝盘（0 T）放置在双侧乳突上：结果：0.4 T 时 COP 运动的轨迹长度和包络面积均明显小于 0 T：意义：相对较小的磁前庭刺激可减少姿势摇摆。这种方法可能有助于改善前庭功能和相关反射。

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

期刊介绍： Neuroscience Letters is devoted to the rapid publication of short, high-quality papers of interest to the broad community of neuroscientists. Only papers which will make a significant addition to the literature in the field will be published. Papers in all areas of neuroscience - molecular, cellular, developmental, systems, behavioral and cognitive, as well as computational - will be considered for publication. Submission of laboratory investigations that shed light on disease mechanisms is encouraged. Special Issues, edited by Guest Editors to cover new and rapidly-moving areas, will include invited mini-reviews. Occasional mini-reviews in especially timely areas will be considered for publication, without invitation, outside of Special Issues; these un-solicited mini-reviews can be submitted without invitation but must be of very high quality. Clinical studies will also be published if they provide new information about organization or actions of the nervous system, or provide new insights into the neurobiology of disease. NSL does not publish case reports.