Sherif M H, Gregor R J, Liu L M, Roy R R, Hager C L
J Biomech. 1983;16(9):691-701. doi: 10.1016/0021-9290(83)90079-9.
The purpose of this investigation was to associate the force produced by the cat medial gastrocnemius (MG) during unrestrained treadmill locomotion with the corresponding myoelectric signals (MES's). An intervention analysis based on the autoregressive-integrated moving average (ARIMA) process was performed on records obtained at treadmill speeds of 0.67 ms-1 and 2.24 ms-1. Results indicate that the pattern of MG myoelectric activity during a single step cycle may be divided into two parts. The primary burst (E1 burst) of activity occurs before foot contact and represents an energy build up which is related to a major part of the MG force monitored at the tendon. During stance, a second burst of activity is depicted by an almost critically damped second order system, and is responsible for the residual tension observed. Thus in vivo forces can be linked to MES's provided that phase differences between electrical and mechanical responses are taken into account.
本研究的目的是将猫在无约束跑步机运动过程中内侧腓肠肌（MG）产生的力与相应的肌电信号（MES）联系起来。基于自回归积分移动平均（ARIMA）过程对在跑步机速度为0.67 m/s和2.24 m/s时获得的记录进行了干预分析。结果表明，在单个步周期内MG肌电活动模式可分为两部分。主要的活动爆发（E1爆发）发生在足部接触之前，代表能量积累，这与在肌腱处监测到的MG力的主要部分相关。在站立期，活动的第二次爆发由一个几乎临界阻尼的二阶系统描述，并负责观察到的残余张力。因此，只要考虑电反应和机械反应之间的相位差，体内力就可以与MES联系起来。
