title: Real-time and wearable functional electrical stimulation system for volitional hand motor function control using the electromyography bridge method.
abstract: Voluntary participation of hemiplegic patients is crucial for functional electrical stimulation therapy. A wearable functional electrical stimulation system has been proposed for real-time volitional hand motor function control using the electromyography bridge method. Through a series of novel design concepts, including the integration of a detecting circuit and an analog-to-digital converter, a miniaturized functional electrical stimulation circuit technique, a low-power super-regeneration chip for wireless receiving, and two wearable armbands, a prototype system has been established with reduced size, power, and overall cost. Based on wrist joint torque reproduction and classification experiments performed on six healthy subjects, the optimized surface electromyography thresholds and trained logistic regression classifier parameters were statistically chosen to establish wrist and hand motion control with high accuracy. Test results showed that wrist flexion/extension, hand grasp, and finger extension could be reproduced with high accuracy and low latency. This system can build a bridge of information transmission between healthy limbs and paralyzed limbs, effectively improve voluntary participation of hemiplegic patients, and elevate efficiency of rehabilitation training.
authors.affiliation: Institute of RF- & OE-ICs, Southeast University, Nanjing, Jiangsu Province, China.
authors.forename: Hai-Peng
authors.initials: HP
authors.lastname: Wang
authors.affiliation: State Key Lab of Bioelectronics, Southeast University, Nanjing, Jiangsu Province, China.
authors.forename: Zheng-Yang
authors.initials: ZY
authors.lastname: Bi
authors.affiliation: Institute of RF- & OE-ICs, Southeast University, Nanjing, Jiangsu Province, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: State Key Lab of Bioelectronics, Southeast University, Nanjing, Jiangsu Province, China.
authors.forename: Yu-Xuan
authors.initials: YX
authors.lastname: Zhou
authors.affiliation: Institute of RF- & OE-ICs, Southeast University, Nanjing, Jiangsu Province, China; Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu Province, China.
authors.forename: Zhi-Gong
authors.identifier: 0000-0002-9203-4683
authors.initials: ZG
authors.lastname: Wang
authors.affiliation: State Key Lab of Bioelectronics, Southeast University, Nanjing, Jiangsu Province, China; Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu Province, China.
authors.forename: Xiao-Ying
authors.initials: XY
authors.lastname: Lv
keywords: circuit and system; electromyography control; frequency-modulation stimulation; functional electrical stimulation; hand motion; logistic regression; nerve regeneration; neural regeneration; real-time; rehabilitation of upper-limb hemiplegia; stroke; wearable device