Myoelectric performance of the reconstructed elbow flexor in patients with brachial plexus injuries

IF 2 4区 医学 Q3 NEUROSCIENCES
Emily J. Miller , Sandesh G. Bhat , Paul H. Kane , Alexander Y. Shin , Kenton R. Kaufman
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引用次数: 0

Abstract

Traumatic adult brachial plexus injury is a debilitating injury. Myoelectric exoskeletons are functional tools for restoring elbow flexion. Electromyography signals are used for exoskeleton control, but a characterization specific to the traumatic adult brachial plexus injury population has yet to be performed. This study evaluated if adult patients with traumatic brachial plexus injury and a reconstructed elbow flexor can control a myoelectric exoskeleton. Adult patients who underwent surgical intervention to restore elbow flexion with traumatic brachial plexus injury were recruited for this cross-sectional study. The processed elbow flexor muscle signal and activation thresholds were used to evaluate criteria for exoskeleton control algorithm development. A single activation threshold can be utilized for exoskeleton control, but the calibration routine should consider the resting signal for both extended and flexed elbow positions. The data indicated a ‘settle-time’ following contraction is needed to prevent unintentional movement of the exoskeleton. All patients activated their elbow flexor above the activation threshold in the supported, flexed position. However, there were different abilities to generate multiple, discrete signals. These results were not specific to surgery, nerve implemented for reconstruction, or post-operative recovery time. Patients with a brachial plexus injury and a reconstructed elbow flexor demonstrated subject-specific capabilities for exoskeleton control.
臂丛神经损伤患者重建屈肘肌的肌电表现
成人臂丛神经创伤是一种使人衰弱的损伤。肌电外骨架是恢复肘关节屈曲的功能性工具。肌电信号可用于外骨骼控制,但专门针对创伤性成人臂丛神经损伤人群的特征描述尚未进行。本研究评估了创伤性臂丛神经损伤和肘屈肌重建的成年患者能否控制肌电外骨架。这项横断面研究招募了因外伤性臂丛神经损伤而接受手术治疗以恢复屈肘功能的成年患者。处理后的肘屈肌信号和激活阈值被用于评估外骨骼控制算法的开发标准。单一激活阈值可用于外骨骼控制,但校准程序应考虑伸肘和屈肘位置的静息信号。数据显示,收缩后需要一个 "稳定时间",以防止外骨骼意外移动。所有患者在支撑、屈曲位置时,屈肘肌的激活都超过了激活阈值。不过,他们产生多个离散信号的能力各不相同。这些结果与手术、重建神经或术后恢复时间无关。臂丛神经损伤和重建肘屈肌的患者在外骨骼控制方面表现出了特定的能力。
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来源期刊
CiteScore
4.70
自引率
8.00%
发文量
70
审稿时长
74 days
期刊介绍: Journal of Electromyography & Kinesiology is the primary source for outstanding original articles on the study of human movement from muscle contraction via its motor units and sensory system to integrated motion through mechanical and electrical detection techniques. As the official publication of the International Society of Electrophysiology and Kinesiology, the journal is dedicated to publishing the best work in all areas of electromyography and kinesiology, including: control of movement, muscle fatigue, muscle and nerve properties, joint biomechanics and electrical stimulation. Applications in rehabilitation, sports & exercise, motion analysis, ergonomics, alternative & complimentary medicine, measures of human performance and technical articles on electromyographic signal processing are welcome.
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