Brain-controlled cycling system for rehabilitation following paraplegia with delay-time prediction
Brain-controlled cycling system for rehabilitation following paraplegia with delay-time prediction
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DOI：
10.1088/1741-2552/abd1bf
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发表时间：
2020-12
影响因子：
4
通讯作者：
Shintaro Nakatani;N. Araki;T. Hoshino;O. Fukayama;K. Mabuchi
中科院分区：
文献类型：
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作者：
Shintaro Nakatani;N. Araki;T. Hoshino;O. Fukayama;K. Mabuchi
Objective.机器人康复系统已被研究，以协助运动功能障碍的恢复，下肢瘫痪的患者引起的中枢神经系统病变。这些系统旨在提供与运动相关的适当感觉反馈。适当的反馈被认为会导致神经元同步放电，从而导致功能恢复。Approach.在这项研究中，我们设计和评估了一个测力自行车轮椅，与脑机接口（BMI），可以迫使腿移动，包括正常的步进速度和快速反应。实验在五名健康受试者和一名脊髓损伤（SCI）患者中进行，他们经历了下肢的完全瘫痪。在β频段（18-28 Hz）的事件相关去噪声化用于检测下肢运动图像。主要结果。基于测力计的BMI系统能够安全轻松地迫使患者以约1.6 s/步（19 rpm）的速度进行腿部运动，SCI参与者的在线准确率为73.1%。从提示到蹬踏开始的平均检测时间为0.83 ± 0.31 s。意义该系统可以在实验过程中轻松安全地保持正常的步行速度，并设计为适应有意开始和身体运动之间的预期延迟，以实现对每个参与者的康复效果。与康复系统一起实施的类似BMI系统可以适用于广泛的患者。
Objective. Robotic rehabilitation systems have been investigated to assist with motor dysfunction recovery in patients with lower-extremity paralysis caused by central nervous system lesions. These systems are intended to provide appropriate sensory feedback associated with locomotion. Appropriate feedback is thought to cause synchronous neuron firing, resulting in the recovery of function. Approach. In this study, we designed and evaluated an ergometric cycling wheelchair, with a brain–machine interface (BMI), that can force the legs to move by including normal stepping speeds and quick responses. Experiments were conducted in five healthy subjects and one patient with spinal cord injury (SCI), who experienced the complete paralysis of the lower limbs. Event-related desynchronization in the β band (18–28 Hz) was used to detect lower-limb motor images. Main results. An ergometer-based BMI system was able to safely and easily force patients to perform leg movements, at a rate of approximately 1.6 s/step (19 rpm), with an online accuracy rate of 73.1% for the SCI participant. Mean detection time from the cue to pedaling onset was 0.83 ± 0.31 s. Significance. This system can easily and safely maintain a normal walking speed during the experiment and be designed to accommodate the expected delay between the intentional onset and physical movement, to achieve rehabilitation effects for each participant. Similar BMI systems, implemented with rehabilitation systems, may be applicable to a wide range of patients.