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首页> 外文期刊>Gait & posture >Increasing speed to improve arm movement and standing postural control in Parkinson's disease patients when catching virtual moving balls
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Increasing speed to improve arm movement and standing postural control in Parkinson's disease patients when catching virtual moving balls

机译：捕捉虚拟移动球时，提高速度以改善帕金森氏病患者的手臂运动和站立姿势控制

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Research has shown that moving targets help Parkinson's disease (PD) patients improve their arm movement while sitting. We examined whether increasing the speed of a moving ball would also improve standing postural control in PD patients during a virtual reality (VR) ball-catching task. Twenty-one PD patients and 21 controls bilaterally reached to catch slow-moving and then fast-moving virtual balls while standing. A projection-based VR system connected to a motion-tracking system and a force platform was used. Dependent measures included the kinematics of arm movement (movement time, peak velocity), duration of anticipatory postural adjustments (APA), and center of pressure (COP) movement (movement time, maximum amplitude, and average velocity). When catching a fast ball, both PD and control groups made arm movements with shorter movement time and higher peak velocity, longer APA, as well as COP movements with shorter movement time and smaller amplitude than when catching a slow ball. The change in performance from slow- to fast-ball conditions was not different between the PD and control groups. The results suggest that raising the speed of virtual moving targets should increase the speed of arm and COP movements for PD patients. Therapists, however, should also be aware that a fast virtual moving target causes the patient to confine the COP excursion to a smaller amplitude. Future research should examine the effect of other task parameters (e.g., target distance, direction) on COP movement and examine the long-term effect of VR training.
机译：研究表明，移动目标有助于帕金森氏病（PD）患者坐着时改善手臂运动。我们研究了在虚拟现实（VR）接球任务期间，提高移动球的速度是否还会改善PD患者的站立姿势控制。二十一例PD患者和21名控制者双向站立，以站立时捕捉缓慢移动然后快速移动的虚拟球。使用了基于投影的VR系统，该系统连接到运动跟踪系统和力平台。相关测量包括手臂运动的运动学（运动时间，峰值速度），预期姿势调整的持续时间（APA）和压力中心（COP）运动的运动学（运动时间，最大幅度和平均速度）。与接慢球时相比，PD和对照组在接球快时，手臂动作的运动时间较短，峰值速度较高，APA较长，而COP动作的时间较短，幅度较小。 PD组和对照组之间，从慢球到快球的性能变化没有差异。结果表明，提高虚拟移动目标的速度应增加PD患者手臂和COP运动的速度。但是，治疗师也应该意识到，快速移动的虚拟目标会使患者将COP偏移限制在较小的幅度。未来的研究应检查其他任务参数（例如目标距离，方向）对COP运动的影响，并检查VR训练的长期影响。

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