Filligoi G, Berardelli A, Bini G, Cruccu G, Manfredi M, Visconti M
Boll Soc Ital Biol Sper. 1979 Jul 30;55(14):1355-61.
A Multielectrodic EMG analysis program is developing. The purpose is to get as short as possible the main EMG parameters (amplitude, duration, frequency) of most motor units, and to reach an estimation of the anatomical extent of single units. According to the muscle extent a variable number of electrodes are inserted crosswise the fibers. EMG signals are simultaneously recorded on a multichannel AMPEX FR1300 and then off-line processed by a 21MX HP minicomputer connected with a 5Mbytes disc drive. Some technical problems had to be solved:channel amplification adjustment to avoid any difference among preamplifiers calibration and filtering, severe hum filtering of main power that is specially strong in nultielectrodic recording systems, the need of sampling at the same Nyquist time the signals of different channels. The computer is instructed to identify the "sinchronous" units i.e. the motor units recorded from more than one channel. These motor units are detected, counted and deleted from all the channels, except the one where they show the maximum amplitude. The percentage of these sinchronous units depends upon the interelectrodic distance and their anatomical area, thus it can support an evaluation of motor unit anatomical spread.
一个多电极肌电图分析程序正在开发中。目的是尽可能缩短大多数运动单位的主要肌电图参数（幅度、持续时间、频率），并估计单个单位的解剖范围。根据肌肉范围，将数量可变的电极横向插入纤维中。肌电图信号在多通道AMPEX FR1300上同时记录，然后由与5兆字节磁盘驱动器相连的21MX HP小型计算机进行离线处理。必须解决一些技术问题：通道放大调整，以避免前置放大器校准和滤波之间的任何差异；主电源的严重哼声滤波，这在多电极记录系统中特别强烈；需要在相同的奈奎斯特时间对不同通道的信号进行采样。计算机被指示识别“同步”单位，即从多个通道记录的运动单位。这些运动单位被检测、计数并从所有通道中删除，但它们显示最大幅度的通道除外。这些同步单位的百分比取决于电极间距离及其解剖区域，因此它可以支持对运动单位解剖分布的评估。
