Nishizono H, Saito Y, Miyashita M
Electroencephalogr Clin Neurophysiol. 1979 Jun;46(6):659-64. doi: 10.1016/0013-4694(79)90103-2.
In the present study new methods were developed for estimation of conduction velocity using surface electrodes. The subjects were 4 healthy male volunteers, aged 23-29 years. EMGs were recorded from m. biceps brachii by several surface electrodes and a fine-wire bipolar electrode during weak isometric contraction with the elbow positioned at 90 degrees. Surface electrodes, 8 mm in diameter, were spaced along the course of muscle fibers at 20 mm intervals, while the bipolar fine-wire electrode was inserted in the middle of the muscle. The EMGs recorded on the magnetic tape were analyzed through a mini-computer system (ATAC-2300). Triggering a signal averager by spike potentials of single motor unit recorded by the inserted electrode, the average contribution of the single motor unit to the surface EMG could be extracted. The conduction velocity in m. biceps brachii determined from the averaged waves of each surface electrode was 4.6 +/- 0.5 m/sec (mean +/- S.D.). The conduction velocity estimated from the cross-correlation analysis between the EMGs of two different surface electrodes agreed well with the value obtained by the averaging technique mentioned above.
在本研究中，开发了使用表面电极估计传导速度的新方法。受试者为4名年龄在23 - 29岁之间的健康男性志愿者。在肘部弯曲90度的弱等长收缩过程中，通过多个表面电极和一个细线双极电极从肱二头肌记录肌电图。直径为8毫米的表面电极沿肌纤维方向以20毫米的间隔排列，而双极细线电极插入肌肉中部。通过微型计算机系统（ATAC - 2300）分析记录在磁带上的肌电图。通过插入电极记录的单个运动单位的尖峰电位触发信号平均器，可以提取单个运动单位对表面肌电图的平均贡献。从每个表面电极的平均波确定的肱二头肌传导速度为4.6 +/- 0.5米/秒（平均值 +/- 标准差）。通过两个不同表面电极的肌电图之间的互相关分析估计的传导速度与上述平均技术获得的值非常吻合。
