Kostiukov A I, Marlinskiĭ V V
Neirofiziologiia. 1980;12(6):571-9.
Frequency properties of muscle contraction evoked by macrostimulation of motor cortex were studied in chronic cats. Frequency- and amplitude-modulated stimulation pulse trains were used, alternating component of the induced muscle contraction was considered as output signal. Analysis of signal transformations in the system under study was performed with application of the method of harmonical linearization. Phase lag of the output signal was minimal at 0.2 Hz and ranged from 40 degrees to 90 degrees in various experiments. Phase lag and amplitude decrement were substantially increased at frequencies above 1-2 Hz. The mean value of the phase lag at a frequency of 5 Hz was about 180 degrees, the mean slope of amplitude characteristics in a 2-10 Hz range was equal to -12 dB/decade. It is supposed that certain correction of dynamic properties of the studied system could result from adaptation properties of neuronal firing.
在慢性猫中研究了运动皮层宏观刺激诱发的肌肉收缩的频率特性。使用了频率和幅度调制的刺激脉冲序列，将诱发的肌肉收缩的交变分量视为输出信号。应用谐波线性化方法对所研究系统中的信号变换进行了分析。输出信号的相位滞后在0.2Hz时最小，在各种实验中范围为40度至90度。在高于1-2Hz的频率下，相位滞后和幅度衰减显著增加。在5Hz频率下相位滞后的平均值约为180度，在2-10Hz范围内幅度特性的平均斜率等于-12dB/十倍频程。据推测，所研究系统动态特性的某些校正可能源于神经元放电的适应特性。
