Richardson C, Simmons R W
Brain Res. 1985 Sep 23;343(2):246-51. doi: 10.1016/0006-8993(85)90741-3.
A series of ballistic, unidirectional arm movements were studied to evaluate the electromyographic (EMG) and neuromuscular force patterns that occur when a limb is unexpectedly perturbed. Multiple training trials were continued with a control load spring attached to the apparatus until a pre-specified criterion for learning was attained. The limb was then unexpectedly loaded with one of four test load springs. Examination of the integrated EMG records revealed a coactivation pattern of neuromuscular activity during a major part of the movement. Analysis of applied force data supported the notion of sustained agonist activity. Reciprocal innervation and coactivation patterns were considered in terms of a common motor control system as proposed by the equilibrium point control hypothesis. Manifestation of coactivation rather than reciprocation in the present study was discussed in terms of the execution of unloaded/inertially loaded movements and variable loaded movements.
对一系列弹道式单向手臂运动进行了研究，以评估肢体意外受扰时出现的肌电图（EMG）和神经肌肉力模式。使用连接到器械上的控制负载弹簧继续进行多次训练试验，直到达到预先设定的学习标准。然后，肢体意外地加载四个测试负载弹簧之一。对整合的肌电图记录进行检查发现，在运动的大部分时间里，神经肌肉活动呈现共同激活模式。对施加力数据的分析支持了持续的主动肌活动这一观点。根据平衡点控制假说提出的共同运动控制系统，对交互神经支配和共同激活模式进行了探讨。本研究中共同激活而非交互作用的表现，是根据无负载/惯性负载运动和可变负载运动的执行情况进行讨论的。
