Biomedical Engineering Graduate Program, University of Calgary, Calgary AB, Canada.
Human Performance Laboratory, University of Calgary, Calgary AB, Canada.
PLoS One. 2018 Nov 16;13(11):e0206871. doi: 10.1371/journal.pone.0206871. eCollection 2018.
By means of biofeedback, neuromotor control can be modified. Recent biofeedback experiments have used the power of the electromyogram of one muscle in different frequency bands to control a two-dimensional cursor. However, the human body usually requires coherent activation of multiple muscles to achieve daily life tasks. Additionally, electromyography (EMG) instrumentation has remained the same for decades, and might not be the most suitable to measure coherent activations from pennated muscles according to recent experiments by von Tscharner and colleagues. In this study, we propose the development of a multichannel current-based EMG amplifier to use intermuscular coherence as the control feature of a visual biofeedback system. The system was used in a leg extension protocol to voluntarily increase intermuscular coherence between the vastii muscles. Results from ten subjects show that it is possible to increase intermuscular coherence through visual biofeedback. Such a system can have applications in endurance training and rehabilitation.
通过生物反馈，神经运动控制可以得到修正。最近的生物反馈实验利用一块肌肉在不同频带的肌电图力量来控制二维光标。然而，人体通常需要多个肌肉的连贯激活来完成日常生活任务。此外，根据 von Tscharner 及其同事最近的实验，肌电图（EMG）仪器几十年来一直保持不变，可能不太适合测量羽状肌的连贯激活。在这项研究中，我们提出开发一种多通道电流式 EMG 放大器，将肌肉间相干性作为视觉生物反馈系统的控制特征。该系统用于腿部伸展协议中，以自愿增加股四头肌之间的肌肉间相干性。十位受试者的结果表明，通过视觉生物反馈增加肌肉间相干性是可行的。这样的系统可以应用于耐力训练和康复。
