Morgan D L
Am J Physiol. 1977 Jan;232(1):C45-9. doi: 10.1152/ajpcell.1977.232.1.C45.
The short-range stiffness of smoothly but submaximally contracting isometric soleus muscles of anesthetised cats was measured by applying small fast stretches. The ratio of isometric tension to stiffness was plotted against tension over a wide range of muscle lengths and stimulus rates. The results fitted a straight line well, as predicted from crossbridge theory, showing the stiffness to be a function of tension only, independent of the combination of length and stimulus rate used to generate the tension. The major deviation from this line was attributed to incomplete fusion at low frequencies of stimulation. Values believed to be tendon compliance and crossbridge tension per unit of stiffness were found from the graph, and the tendon compliance correlated with the maximum muscle tension. Shortening the tendon by attaching nearer to the muscle changed the results in a manner consistent with the theory, provided that appropriate precautions were taken against slippage.
通过施加小幅度快速拉伸，测量了麻醉猫的比目鱼肌在平稳但未达到最大程度收缩的等长收缩状态下的短程刚度。在很宽的肌肉长度和刺激频率范围内，将等长张力与刚度的比值与张力作图。结果与从横桥理论预测的一样，很好地拟合了一条直线，表明刚度仅是张力的函数，与用于产生张力的长度和刺激频率的组合无关。与这条直线的主要偏差归因于低刺激频率下的不完全融合。从该图中得出了被认为是肌腱顺应性和每单位刚度的横桥张力的值，并且肌腱顺应性与最大肌肉张力相关。通过更靠近肌肉附着来缩短肌腱，只要采取适当的防滑措施，就会以与理论一致的方式改变结果。
