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首页> 美国卫生研究院文献>Behavioral Sciences >Virtual-Reality-Induced Visual Perturbations Impact Postural Control System Behavior
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Virtual-Reality-Induced Visual Perturbations Impact Postural Control System Behavior

机译：虚拟现实引起的视觉干扰影响姿势控制系统行为

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Background: Virtual reality (VR) is becoming a widespread tool in rehabilitation, especially for postural stability. However, the impact of using VR in a “moving wall paradigm” (visual perturbation), specifically without and with anticipation of the perturbation, is unknown. Methods: Nineteen healthy subjects performed three trials of static balance testing on a force plate under three different conditions: baseline (no perturbation), unexpected VR perturbation, and expected VR perturbation. The statistical analysis consisted of a 1 × 3 repeated-measures ANOVA to test for differences in the center of pressure (COP) displacement, 95% ellipsoid area, and COP sway velocity. Results: The expected perturbation rendered significantly lower ( < 0.05) COP displacements and 95% ellipsoid area compared to the unexpected condition. A significantly higher ( < 0.05) sway velocity was also observed in the expected condition compared to the unexpected condition. Conclusions: Postural stability was lowered during unexpected visual perturbations compared to both during baseline and during expected visual perturbations, suggesting that conflicting visual feedback induced postural instability due to compensatory postural responses. However, during expected visual perturbations, significantly lowered postural sway displacement and area were achieved by increasing the sway velocity, suggesting the occurrence of postural behavior due to anticipatory postural responses. Finally, the study also concluded that VR could be used to induce different postural responses by providing visual perturbations to the postural control system, which can subsequently be used as an effective and low-cost tool for postural stability training and rehabilitation.
机译：背景：虚拟现实（VR）正在成为康复中一种广泛使用的工具，尤其是对于姿势稳定性。然而，未知的是，在“移动墙范式”（视觉扰动）中使用VR的影响，特别是在没有扰动和预期扰动的情况下。方法：19名健康受试者在三种不同条件下对力板进行了三项静态平衡测试：基线（无扰动），意外的VR扰动和预期的VR扰动。统计分析由1×3重复测量ANOVA组成，以测试压力中心（COP）位移，95％椭球面积和COP摇摆速度的差异。结果：与意外情况相比，预期的扰动显着降低了（<0.05）COP位移和95％的椭球面积。与预期状况相比，在预期状况下也观察到了明显更高的摇摆速度（<0.05）。结论：与基线期间和预期的视觉扰动相比，意外的视觉扰动期间的姿势稳定性降低，这表明由于补偿性姿势反应，相互矛盾的视觉反馈引起姿势不稳定。但是，在预期的视觉扰动期间，通过增加摇摆速度可以显着降低姿势摇摆位移和面积，这表明由于预期的姿势响应而导致的姿势行为的发生。最后，研究还得出结论，通过为姿势控制系统提供视觉干扰，VR可以用于诱导不同的姿势反应，随后可以将其用作姿势稳定性训练和康复的有效且低成本的工具。

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