Directional virtual time-to-contact: A new measure for investigating temporal, spatial, and control aspects of postural balance control.
Directional virtual time-to-contact: A new measure for investigating temporal, spatial, and control aspects of postural balance control.
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定向虚拟接触时间：一种用于研究姿势平衡控制的时间、空间和控制方面的新方法。
DOI：
10.1016/j.jbiomech.2022.111428
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发表时间：
2022
影响因子：
2.4
通讯作者：
Hyunglae Lee
中科院分区：
文献类型：
--
作者：
V. Phan;D. Peterson;Hyunglae Lee
虚拟接触时间（VTC）是研究姿势平衡控制的一种有前途的方法。然而，当前的 VTC 计算方法受到限制，因为它们 (1) 不能用于评估平衡的方向分量，并且 (2) 仅评估平衡控制的单个时间方面。本研究引入了一种新的 VTC 计算方法，即定向 VTC，扩展 VTC 来评估平衡的时间、空间和控制方面。在不同人群和条件下进行了三个案例研究，作为所提出方法的概念验证。第一项研究比较了帕金森病患者（PD；n = 10）与健康同龄人（n = 10）在坚硬表面上的安静姿势。第二项和第三项研究评估了健康个体在挑战性环境下的平衡控制。十名健康人参与了在柔顺地面上的站立任务，另外十名健康人则在振荡地面上进行了站立任务，所有这些均由双轴机器人平台模拟。初步结果不仅提供了对时间、空间和控制等多个方面的平衡控制的更深入研究，而且还显示了平衡的不同方面如何因神经系统疾病（案例研究 I）或具有挑战性的站立基础（案例研究 II 和 III）而发生变化。这项研究增进了我们对姿势生物力学及其临床应用的理解。
Virtual time-to-contact (VTC) is a promising approach for investigating postural balance control. However, current VTC calculation approaches are limited as they (1) cannot be used to evaluate directional components of balance, and (2) only assess a single, temporal aspect of balance control. This study introduces a new approach for VTC calculation, namely directional VTC, expanding VTC to assess temporal, spatial, and control aspects of balance. Three case studies were conducted across varying populations and conditions as a proof-of-concept of the presented method. The first study examined quiet stance on a firm surface in people with Parkinson’s disease (PD; n = 10) in comparison to their healthy peers (n = 10). The second and third studies assessed balance control of healthy individuals under challenging environments. Ten healthy individuals participated in standing tasks on compliant ground surfaces, while another ten on oscillatory ground surfaces, all simulated by a dual-axis robotic platform. Preliminary results not only provided a closer look at balance control with multiple aspects, including temporal, spatial, and control aspects, but also showed how different aspects of balance changed due to neurological diseases (Case Study I) or challenging standing grounds (Case Studies II and III). This study advances our understanding of posture biomechanics and its clinical applications.
影响因子：
2.4
作者：
Mancini M;Carlson-Kuhta P;Zampieri C;Nutt JG;Chiari L;Horak FB
通讯作者：
Horak FB