Maĭorov V I, Savchenko E I, Kotliar B I
Neirofiziologiia. 1977;9(2):115-23.
The activity of 112 units of the cat precruciate motor cortex was studied simultaneously with the performance of a placing reaction of the foreleg to tactile stimulation of its distal parts. The response latency to the tactile stimulation of the foreleg was 30-40 ms for the electromyographic response of m. biceps brachii and 20 +/- 10 ms for the earliest-responses of the motor cortical neurons. The electrical reaction of m. biceps brachii occured 5-10 ms after the termination of the electrical stimulation of the cortex by a puls series (the series duration was 25 ms, the pulse duration 0.2 ms, frequency 400 per s). Two different types of excitatory reactions of the motor cortex units were found: the sensory (s) ones occured at each tactile stimulus and did not depend on the presence or absence of the foreleg motion; the motor (m) type of reactions developed simultaneously with the motor placing reaction of the foreleg only. The minimal latency of cortical m- and s-type discharge was 20 +/- 10 ms. Electrical stimulation (5-25 micronA) through the microelectrode placed in the locus of neuronal activity which increased during active flexion of the foreleg, provoked in 70% of cases the electrical response in m. biceps brachii.
在猫前十字运动皮层的112个单位活动被研究的同时，观察前肢远端触觉刺激引发的放置反应。肱二头肌的肌电图反应对前肢触觉刺激的反应潜伏期为30 - 40毫秒，运动皮层神经元的最早反应潜伏期为20±10毫秒。在一系列脉冲（系列持续时间为25毫秒，脉冲持续时间为0.2毫秒，频率为每秒400次）对皮层进行电刺激终止后5 - 10毫秒，肱二头肌出现电反应。发现了运动皮层单位的两种不同类型的兴奋性反应：感觉（s）型反应在每次触觉刺激时出现，且不依赖于前肢运动的有无；运动（m）型反应仅在前肢的运动放置反应同时出现。皮层m型和s型放电的最小潜伏期为20±10毫秒。通过置于在前肢主动屈曲时神经元活动增加部位的微电极进行电刺激（5 - 25微安），在70%的情况下会引发肱二头肌的电反应。
