The integrated virtual environment rehabilitation treadmill system.
The integrated virtual environment rehabilitation treadmill system.
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DOI：
10.1109/tnsre.2011.2120623
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发表时间：
2011-06
期刊：
影响因子：
--
通讯作者：
Lewek MD
中科院分区：
文献类型：
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作者：
Feasel J;Whitton MC;Kassler L;Brooks FP;Lewek MD
缓慢的步态速度和肢体间不对称在各种疾病中普遍存在。目前的运动再训练方法强调在密集的、特定任务的练习中需要适当的反馈。本文介绍了集成的虚拟环境康复跑步机（IVERT）系统的设计和可行性测试，旨在提供实时，直观的反馈步态速度和训练过程中的不对称性。IVERT系统集成了一个仪表化的，分裂带跑步机与前投影，沉浸式虚拟环境。该新颖的自适应控制系统仅使用来自跑步机的地面反作用力数据来独立地连续更新两个跑步机带的速度，以及在虚拟环境中真实的时间中控制速度和航向。关于步态不对称性的反馈1）视觉上呈现为通过虚拟环境行走弯曲轨迹，以及2）本体感知上呈现为在分带式跑步机上的不同带速度的形式。一项涉及五名步态不对称的人的可行性研究发现，这些人可以有效地控制运动速度，并在训练过程中感知步态不对称。尽管在一次训练后立即观察到地上步态对称性的最小变化，但应进行进一步研究，以确定IVERT作为通过为患者提供一致的视觉和本体感受反馈来康复不对称步态的工具的潜力。
Slow gait speed and interlimb asymmetry are prevalent in a variety of disorders. Current approaches to locomotor retraining emphasize the need for appropriate feedback during intensive, task-specific practice. This paper describes the design and feasibility testing of the integrated virtual environment rehabilitation treadmill (IVERT) system intended to provide real-time, intuitive feedback regarding gait speed and asymmetry during training. The IVERT system integrates an instrumented, split-belt treadmill with a front-projection, immersive virtual environment. The novel adaptive control system uses only ground reaction force data from the treadmill to continuously update the speeds of the two treadmill belts independently, as well as to control the speed and heading in the virtual environment in real time. Feedback regarding gait asymmetry is presented 1) visually as walking a curved trajectory through the virtual environment and 2) proprioceptively in the form of different belt speeds on the split-belt treadmill. A feasibility study involving five individuals with asymmetric gait found that these individuals could effectively control the speed of locomotion and perceive gait asymmetry during the training session. Although minimal changes in overground gait symmetry were observed immediately following a single training session, further studies should be done to determine the IVERT’s potential as a tool for rehabilitation of asymmetric gait by providing patients with congruent visual and proprioceptive feedback.