Kudina L P
Electroencephalogr Clin Neurophysiol. 1980 Nov;50(3-4):214-21. doi: 10.1016/0013-4694(80)90148-0.
The effects of electrical stimulation of mixed nerves and of the evoked tendon reflex on single firing MUs of antagonists were investigated. The following muscles were studied: m. biceps fem., m. tibialis ant. and m. triceps surae. Under a weak voluntary contraction MU potentials were picked up. Post-stimulus histograms of MU potentials were plotted and the duration of interspike intervals in the post-stimulus period was compared with that in the prestimulus period. Under electrical stimulation of the nerve (Ia afferents) a distinct reciprocal inhibition was observed on MUs of all the 3 investigated muscles. In some cases a weak excitatory drive could be revealed along with the reciprocal inhibition. The tendon (knee) reflex was accompanied by a distinct excitatory effect on MUs of the antagonist. The dependence between the efficiency of the inhibitory volley and the moment within an interspike interval at which the volley arrived was found. The lengthening of an interval was observed only when an inhibitory drive occurred close to its end. The peculiarities of reciprocal inhibition in the firing motoneurone, as well as the possible mechanism of the excitatory effect on the antagonist accompanying the tendon reflex, are discussed.
研究了混合神经电刺激及诱发的腱反射对拮抗肌单发放运动单位（MU）的影响。研究了以下肌肉：股二头肌、胫骨前肌和小腿三头肌。在弱的随意收缩下记录MU电位。绘制MU电位的刺激后直方图，并将刺激后时期的峰间间隔持续时间与刺激前时期进行比较。在神经（Ia传入纤维）电刺激下，在所有3块被研究肌肉的MU上均观察到明显的交互抑制。在某些情况下，除了交互抑制外，还可发现微弱的兴奋性驱动。腱（膝）反射伴随着对拮抗肌MU的明显兴奋作用。发现了抑制性冲动的效率与冲动到达峰间间隔内时刻之间的相关性。仅当抑制性驱动在其接近结束时出现时，才观察到间隔延长。讨论了放电运动神经元中交互抑制的特点，以及伴随腱反射对拮抗肌产生兴奋作用的可能机制。
