Implanted motor neuroprostheses offer significant restoration of function for individuals with spinal cord injury. Providing adequate user control for these devices is a challenge but is crucial for successful performance. Electromyographic (EMG) signals can serve as effective control sources, but the number of above-injury muscles suitable to provide EMG-based control signals is very limited. Previous work has shown the presence of below-injury volitional myoelectric signals even in subjects diagnosed with motor complete spinal cord injury. In this case report, we present a demonstration of a hand grasp neuroprosthesis being controlled by a user with a C6 level, motor complete injury through EMG signals from their toe flexor. These signals were successfully translated into a functional grasp output, which performed similarly to the participant's usual shoulder position control in a grasp-release functional test. This proof-of-concept demonstrates the potential for below-injury myoelectric activity to serve as a novel form of neuroprosthesis control.

中文翻译：

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来自脊髓损伤水平以下的肌电信号作为植入的上肢神经假体的命令来源-病例报告。

植入的运动神经假体为患有脊髓损伤的个体提供了显着的功能恢复。为这些设备提供足够的用户控制是一项挑战，但对于成功的性能至关重要。肌电图（EMG）信号可以用作有效的控制源，但是适合提供基于EMG的控制信号的受伤以上肌肉的数量非常有限。先前的研究表明，即使在被诊断为运动完全性脊髓损伤的受试者中，也存在损伤下方的自主肌电信号。在此病例报告中，我们展示了一个手握神经假体的演示，该假体由C6级用户控制，通过其脚趾屈肌的EMG信号进行运动完全损伤。这些信号已成功转换为功能掌握输出，在抓握释放功能测试中的表现与参与者通常的肩部位置控制类似。这一概念证明证明了损伤下方的肌电活动有可能作为神经假体控制的一种新型形式。