Kostiukov A I
Neirofiziologiia. 1985;17(3):334-43.
Transition processes of the length changes were studied in the ankle extensors of anesthetized cats in case of abrupt transition from isometric to isotonic condition of muscle contraction which was evoked by distributed stimulation of efferents supplied these muscles. Dynamic properties of muscles were analyzed in the framework of the two-components (inertialess and aperiodic) approximation of the transition processes. These properties were nonlinear because of the complex dependence of time constants and weight of an aperiodic component on the amplitudes of input signals. Both of these parameters were significantly lower in the shortening processes comparing with the lengthening ones. When amplitudes of length changes were small, the average limit values of the time constants were 1.38s for slow soleus muscle shortening and 0.39s for its lengthening. The same parameters for fast muscles (gastrocnemius and plantaris) were 0.55 and 0.25s, respectively. The observed dynamical properties of muscle contraction are discussed for their functional significance.
在麻醉猫的踝伸肌中，通过对支配这些肌肉的传出神经进行分布式刺激，引发肌肉收缩从等长状态突然转变为等张状态，研究了长度变化的转变过程。在转变过程的双组分（无惯性和非周期性）近似框架内分析了肌肉的动力学特性。由于时间常数和非周期性组分权重对输入信号幅度的复杂依赖性，这些特性是非线性的。与伸长过程相比，这两个参数在缩短过程中均显著降低。当长度变化幅度较小时，慢比目鱼肌缩短时时间常数的平均极限值为1.38秒，伸长时为0.39秒。快肌（腓肠肌和跖肌）的相同参数分别为0.55秒和0.25秒。讨论了观察到的肌肉收缩动力学特性的功能意义。
