Kostiukov A I
Neirofiziologiia. 1985;17(4):468-75.
Transition processes of the length changes were studied in the ankle extensors of anesthetized cats. The processes were evoked under isotonical conditions by step changes in frequency of distribution stimulation of the efferents supplying these muscles. The system dynamics was essentially nonlinear because the time constants of the processes were dependent on amplitudes and sign of the input signal. The time constants abruptly decreased when the sign of the length changes alternated from minus to plus and continuously decreased when amplitude of the transition process rose in the absolute value. The time constants for the transition processes were 1.15 +/- 0.09 s for soleus shortening and 0.40 +/- 0.07 s for its lengthening. The same parameters in fast muscles were 0.51 +/- 0.085 for shortening and 0.21 +/- 0.04 s for lengthening. These time constants are very close to the parameters of the transition processes: external load-muscles length. The observed properties of the muscles are discussed for their functional significance.
在麻醉猫的踝伸肌中研究了长度变化的过渡过程。这些过程是在等张条件下，通过对供应这些肌肉的传出神经进行分布刺激频率的阶跃变化而诱发的。系统动力学本质上是非线性的，因为这些过程的时间常数取决于输入信号的幅度和符号。当长度变化的符号从负变为正时，时间常数突然减小；当过渡过程的幅度绝对值增大时，时间常数持续减小。比目鱼肌缩短时过渡过程的时间常数为1.15±0.09秒，延长时为0.40±0.07秒。快肌中相同参数缩短时为0.51±0.085秒，延长时为0.21±0.04秒。这些时间常数与过渡过程的参数非常接近：外部负荷-肌肉长度。讨论了观察到的肌肉特性的功能意义。
