Dietz V, Quintern J, Berger W
Neurosci Lett. 1985 Oct 10;60(3):369-74. doi: 10.1016/0304-3940(85)90605-6.
The electromyographic (EMG) patterns of finger flexor and extensor muscles have been studied during ballistic finger movements in three different conditions: (1) rapid isotonic finger flexion; (2) throwing and (3) catching a tennis ball. In 1 and 2 a three-burst pattern was observed. In the latter, the first agonist burst was shorter and of higher amplitude compared to condition 1. Catching a ball was connected with a coactivation of extensor and flexor muscles prior to and during ball contact and a contribution of segmental stretch reflexes to the flexor activation. The finger flexion movement was 10-15 times faster than in conditions 1 and 2. After ischaemic blocking of group I afferents and in patients with rigidity, a short inhibition of the increased extensor activation became predominant and was the basic mechanism underlying finger flexion for catching a ball. It is concluded that in natural ballistic finger movements, other neuronal mechanisms are of functional significance than those seen in the usual experimental paradigms.
在三种不同情况下，对弹道式手指运动过程中手指屈肌和伸肌的肌电图（EMG）模式进行了研究：（1）快速等张手指屈曲；（2）投掷；（3）接住网球。在情况（1）和（2）中观察到了一种三脉冲模式。在情况（3）中，与情况（1）相比，第一个主动肌脉冲更短且幅度更高。接球与在球接触之前和期间伸肌和屈肌的共同激活以及节段性牵张反射对屈肌激活的作用有关。手指屈曲运动比情况（1）和（2）快10 - 15倍。在对I类传入神经进行缺血性阻断后以及在患有僵硬症的患者中，伸肌激活增加的短暂抑制变得占主导地位，并且是接球时手指屈曲的基本机制。得出的结论是，在自然的弹道式手指运动中，与通常实验范式中所见的神经元机制相比，其他神经元机制具有功能意义。
