The dependence of tension upon extension in the stretch reflex of the soleus muscle of the decerebrate cat
The dependence of tension upon extension in the stretch reflex of the soleus muscle of the decerebrate cat
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DOI：
10.1113/jphysiol.1959.sp006260
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发表时间：
1959-10
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影响因子：
--
通讯作者：
P. Matthews
中科院分区：
文献类型：
--
作者：
P. Matthews
在他们对伸展反射的描述中，Liddell&Sherrington(1924)指出：“只要伸展增加，反射就会继续增加。”这一发现对于理解姿势的重要性早已得到认可；但他们的陈述还有一个额外的有趣之处，那就是它将反射反应的大小与引发反射的生理刺激的大小联系起来。本文对刺激(肌肉伸展)和反射反应(肌肉收缩)之间的这种关系进行了更详细的研究，以期增加对反射弧反应的了解，有助于理解其详细的机制。张力和伸展反射之间的关系以前已经通过对肌肉施加一系列不同长度的伸展来研究(Koella，Nakao，Evans&Wada，1956；Granit，1958)。在目前的研究中，拉伸反射是通过以缓慢的恒定速度伸展肌肉，同时记录其张力和应用于其的伸展来引起的。此外，本文还介绍了比目鱼肌伸展对刺激其运动神经所产生的张力的影响的实验。这些实验表明，比目鱼肌的强直融合频率可能会随着其长度的不同而变化--这一发现对于任何关于拉伸反射的神经控制的讨论都是重要的。
In their description of the stretch reflex, Liddell & Sherrington (1924) stated that 'so long as the stretch increases, the reflex continues to increase'. The importance of this finding for an understanding of posture has long been recognized; but their statement has an additional interest in that it relates the magnitude of a reflex response to the size of the physiological stimulus which elicited it. The present paper describes a more detailed study of this relation between stimulus (muscle extension) and its reflex response (muscle contraction) in the hope that increased knowledge of the response of the reflex arc will contribute to an understanding of its detailed mechanisms. The relation between tension and extension of the stretch reflex has been previously studied by applying a series of extensions of different lengths to the muscle (Koella, Nakao, Evans & Wada, 1956; Granit, 1958). In the present study the stretch reflex has been elicited by extending the muscle at a slow constant velocity, while recording both its tension and the extension applied to it. In addition, the present paper describes some experiments on the effect of extending the soleus muscle upon the tension developed in it on stimulation of its motor nerve. These experiments show that the 'tetanic fusion frequency' of soleus may vary with its length-a finding of importance for any'discussion of the neural control of the stretch reflex.