Kostiukov A I, Marlinskiĭ V V
Neirofiziologiia. 1981;13(2):218-20.
Nonlinear properties of muscle contraction evoked by macrostimulation of motor cortex were studied in chronic unrestrained cats. Frequency modulated stimulation pulse train was used, the modulation was performed by low frequency (0.2 +/ 10.0 Hz) harmonical signal. Time decrement of the evoked muscle contraction was accompanied by a pronounced increase in its phase lag which reached 20-30 degrees after 3-4 periods of stimulation. The phase lag increase was also observed with diminishing of stimulation intensity. When stimulus intensity varied from 1.7 to 1.2 threshold, the maximal increment of the phase lag reached 30-40 degrees. Possible mechanisms of the observed nonlinear properties of the motor signal transformation are discussed.
在慢性无拘束猫中研究了运动皮层宏观刺激诱发的肌肉收缩的非线性特性。使用了频率调制刺激脉冲串，调制由低频（0.2±10.0Hz）谐波信号进行。诱发肌肉收缩的时间递减伴随着其相位滞后的显著增加，在刺激3-4个周期后相位滞后达到20-30度。随着刺激强度的减小也观察到相位滞后增加。当刺激强度从1.7阈值变化到1.2阈值时，相位滞后的最大增量达到30-40度。讨论了所观察到的运动信号转换非线性特性的可能机制。
