A 4-DOF Exosuit Using a Hybrid EEG-Based Control Approach for Upper-Limb Rehabilitation

IF 3.7 3区 医学 Q2 ENGINEERING, BIOMEDICAL
Zhichuan Tang;Zhixuan Cui;Hang Wang;Pengcheng Liu;Xuan Xu;Keshuai Yang
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引用次数: 0

Abstract

Rehabilitation devices, such as traditional rigid exoskeletons or exosuits, have been widely used to rehabilitate upper limb function post-stroke. In this paper, we have developed an exosuit with four degrees of freedom to enable users to involve more joints in the rehabilitation process. Additionally, a hybrid electroencephalogram-based (EEG-based) control approach has been developed to promote active user engagement and provide more control commands.The hybrid EEG-based control approach includes steady-state visual evoked potential (SSVEP) paradigm and motor imagery (MI) paradigm. Firstly, the rehabilitation movement was selected by SSVEP paradigm, and the multivariate variational mode decomposition (MVMD) and canonical correlation analysis (CCA) method was used for SSVEP EEG recognition; then, the motion intention was obtained by MI paradigm, and the convolutional neural network (CNN) and long short-term memory network (LSTM) were used to build a CNN-LSTM model for MI EEG recognition; finally, the recognition results were translated into control commands of Bowden cables to achieve multi-degree-of-freedom rehabilitation.Experimental results show that the average classification accuracy of the CNN-LSTM model reaches to 90.07% ± 2.23%, and the overall accuracy of the hybrid EEG-based control approach reaches to 85.26% ± 1.95%. The twelve subjects involved in the usability assessment demonstrated an average system usability scale (SUS) score of 81.25 ± 5.82. Additionally, four participants who underwent a 35-day rehabilitation training demonstrated an average 10.33% increase in range of motion (ROM) across 4 joints, along with a 11.35% increase in the average electromyography (EMG) amplitude of the primary muscle involved.The exosuit demonstrates good accuracy in control, exhibits favorable usability, and shows certain efficacy in multi-joint rehabilitation. Our study has taken into account the neuroplastic principles, aiming to achieve active user engagement while introducing additional degrees of freedom, offering novel ideas and methods for potential brain-computer interface (BCI)-based rehabilitation strategies and hardware development.Clinical impact: Our study presents an exosuit with four degrees of freedom for stroke rehabilitation, enabling multi-joint movement and improved motor recovery. The hybrid EEG-based control approach enhances active user engagement, offering a promising strategy for more effective and user-driven rehabilitation, potentially improving clinical outcomes.Clinical and Translational Impact Statement: By developing an exosuit and a hybrid EEG-based control approach, this study enhances stroke rehabilitation through better user engagement and multi-joint capabilities. These innovations consider neuroplasticity principles, integrating rehabilitation theory with rehabilitation device.
利用基于脑电图的混合控制方法实现上肢康复的 4-DOF 运动服
康复设备,如传统的刚性外骨骼或外骨骼衣,已被广泛用于中风后上肢功能的康复。在本文中,我们开发了一种具有四个自由度的外骨骼,使用户能够让更多关节参与到康复过程中。此外,我们还开发了一种基于脑电图(EEG)的混合控制方法,以促进用户的主动参与,并提供更多的控制指令。首先,通过稳态视觉诱发电位范式选择康复运动,并使用多变量变异模式分解(MVMD)和典型相关分析(CCA)方法进行稳态视觉诱发电位脑电图识别;然后,通过 MI 范式获得运动意图,利用卷积神经网络(CNN)和长短期记忆网络(LSTM)建立 CNN-LSTM 模型,用于 MI 脑电识别;最后,将识别结果转化为 Bowden 电缆的控制指令,实现多自由度康复。实验结果表明,CNN-LSTM 模型的平均分类准确率达到 90.07% ± 2.23%,基于脑电图的混合控制方法的总体准确率达到 85.26% ± 1.95%。参与可用性评估的 12 名受试者的系统可用性量表(SUS)平均得分为 81.25 ± 5.82。此外,4 名参与者接受了为期 35 天的康复训练,4 个关节的活动范围(ROM)平均增加了 10.33%,主要肌肉的肌电图(EMG)平均振幅增加了 11.35%。我们的研究考虑了神经可塑性原理,旨在实现用户的主动参与,同时引入额外的自由度,为潜在的基于脑机接口(BCI)的康复策略和硬件开发提供了新的思路和方法:临床影响:我们的研究为中风康复提供了一种具有四个自由度的外穿衣,可实现多关节运动并改善运动恢复。基于脑电图的混合控制方法提高了用户的主动参与度,为更有效和用户驱动的康复提供了一种前景广阔的策略,有可能改善临床疗效:本研究通过开发外衣和基于脑电图的混合控制方法,提高了用户参与度和多关节功能,从而增强了中风康复效果。这些创新考虑了神经可塑性原理,将康复理论与康复设备相结合。
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来源期刊
CiteScore
7.40
自引率
2.90%
发文量
65
审稿时长
27 weeks
期刊介绍: The IEEE Journal of Translational Engineering in Health and Medicine is an open access product that bridges the engineering and clinical worlds, focusing on detailed descriptions of advanced technical solutions to a clinical need along with clinical results and healthcare relevance. The journal provides a platform for state-of-the-art technology directions in the interdisciplinary field of biomedical engineering, embracing engineering, life sciences and medicine. A unique aspect of the journal is its ability to foster a collaboration between physicians and engineers for presenting broad and compelling real world technological and engineering solutions that can be implemented in the interest of improving quality of patient care and treatment outcomes, thereby reducing costs and improving efficiency. The journal provides an active forum for clinical research and relevant state-of the-art technology for members of all the IEEE societies that have an interest in biomedical engineering as well as reaching out directly to physicians and the medical community through the American Medical Association (AMA) and other clinical societies. The scope of the journal includes, but is not limited, to topics on: Medical devices, healthcare delivery systems, global healthcare initiatives, and ICT based services; Technological relevance to healthcare cost reduction; Technology affecting healthcare management, decision-making, and policy; Advanced technical work that is applied to solving specific clinical needs.
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