EMG-Based prediction of shoulder and elbow kinematics in able-bodied and spinal cord injured individuals
EMG-Based prediction of shoulder and elbow kinematics in able-bodied and spinal cord injured individuals
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DOI：
10.1109/86.895950
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发表时间：
2000-12-01
期刊：
影响因子：
--
通讯作者：
Kirsch, RF
中科院分区：
文献类型：
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作者：
Au, ATC;Kirsch, RF
我们评估了延时人工神经网络(TDANN)预测肩部和肘部运动的能力，只使用从六块肩部和肘部肌肉记录的肌电(EMG)信号作为输入，在健全的受试者和C5脊髓损伤引起的四肢瘫痪的受试者中都是如此。对于身体健全的受试者，在不同速度和不同手负荷下进行的复杂程度迥异的运动中，所有四个关节角度(肘关节屈伸和肩部水平屈伸、仰仰和内外旋转)的平均均方根(RMS)误差均小于20度。预测了相应的角速度和角加速度，相对误差更小。对于C5四肢瘫痪患者，关节角度、速度和加速度的绝对均方根误差实际上比健全受试者要小，但当考虑到C5受试者较小的运动范围时，相对误差相似。这些结果表明，来自肩部和肘部肌肉的肌电信号包含大量关于手臂运动运动学的信息，可以利用这些信息开发先进的控制系统，通过对瘫痪肌肉的功能性神经肌肉刺激来增强或恢复四肢瘫痪患者的肩部和肘部运动。
We have evaluated the ability of a time-delayed artificial neural network (TDANN) to predict shoulder and elbow motions using only electromyographic (EMG) signals recorded from six shoulder and elbow muscles as inputs, both in able-bodied subjects and in subjects with tetraplegia arising from C5 spinal cord injury. For able-bodied subjects, all four joint angles (elbow flexion-extension and shoulder horizontal flexion-extension, elevation-depression, and internal-external rotation) were predicted with average root-mean-square (rms) errors of less than 20 degrees during movements of widely different complexities performed at different speeds and with different hand loads. The corresponding angular velocities and angular accelerations were predicted with even lower relative errors. For individuals with C5 tetraplegia, the absolute rms errors of the joint angles, velocities, and accelerations were actually smaller than for able-bodied subjects, but the relative errors were similar when the smaller movement ranges of the C5 subjects were taken into account. These results indicate that the EMG signals from shoulder and elbow muscles contain a significant amount of information about arm movement kinematics that could be exploited to develop advanced control systems for augmenting or restoring shoulder and elbow movements to individuals with tetraplegia using functional neuromuscular stimulation of paralyzed muscles.