前臂多腱肌的多通道表面肌电检测电极阵列装置的设计

设计了一种无创采集前臂多腱肌的多通道表面肌电（sEMG）信号的线性电极阵列．利用柔性印刷工艺制备的8个条形镀金电极以5mm的电极间距（IED）排成一列．预先冲孔的医用双面胶粘贴在电极面构成的一次性非接触粘贴结构可填充少量导电膏，而且便于电极固定在皮肤表面．单差分sEMG信号被放大和带通滤波．较小的电极阻抗保证了此种镀金电极具有恒定的电学性能．相对稳定的低电极．皮肤接触阻抗确保了稳定的基线和良好的信噪比（SNR）．为了探讨此装置的实际可用性，在单指力量输出任务时同步记录9名受试者指浅屈肌（FDS）的14通道sEMG信号．稳定的基线，良好的sEMG信号质量和显著的肌肉活动的通道差异性表明该电极阵列是一种可用于前臂多腱肌长时多通道sEMG信号采集的极具发展前景的技术．

Design of Electrode Array for Multichannel sEMG Recording of Multitendoned Forearm Muscles

A linear electrode array was designed to record multichannel surface electromyography （sEMG） of multitendoned forearm muscles noninvasively. Eight gold-coated bar electrodes were fabrica- ted using a flex-print technique and arranged in one-dimensional array with inter-electrode distance （lED） （center-to-center） of 5 mm. The disposable adhesive non-contact structure was made with pre-punched double-sided medical tape for filling a small amount of conductive cream and attaching to skin with ease. Single differential sEMG signal was amplified and band-pass filtered. Low electrode impedance guaran- tees the consistent electrical property of gold-coated electrode. Low and relatively stable electrode-skin impedances ensure the stability of baseline and a good signal-to-noise ratio （SNR）. To explore the practi- cal possibility of the electrode array, 14 channel sEMG signals of nine subjects were simultaneously recor- ded from flexor digitorum superficialis（FDS） during single-digit force production tasks. High stability of baseline, excellent quality of sEMG signals and good channel discrimination of muscle activation indicate that this electrode array device is a promising technology for long-term multichannel sEMG signal record- ing of multitendoned forearm muscles.