关于青蛙缝匠肌电阻的一项研究。
A study on the electrical resistance of the frog sartorius muscle.
作者信息
Schanne O, Kawata H, Schäfer B, Lavallée M
出版信息
J Gen Physiol. 1966 May;49(5):897-912. doi: 10.1085/jgp.49.5.897.
Four different methods of measuring the resistance of a muscle fiber have been applied to the frog sartorius muscle. The methods, in which the resistance of the microelectrode entered the calculation of the effective resistance of the fiber, resulted in values which were 8 times higher than the resistance values obtained with methods independent of the electrode resistance. A simple cable model of a muscle fiber could not account for the discrepancy in the effective resistance found in these measurements; therefore, an enlarged cable model for a muscle fiber has been proposed, and its biological implications have been discussed. The effective resistance (measured with the two different groups of methods) decreased when the potassium concentration in the bath increased. Using the proposed enlarged cable model for the interpretation of these results, it is shown that not only the membrane resistance but also the myoplasmic resistance decreases with an increasing potassium concentration in the Ringer solution.
已将四种不同的测量肌纤维电阻的方法应用于青蛙缝匠肌。这些方法将微电极的电阻纳入纤维有效电阻的计算中，所得值比使用与电极电阻无关的方法获得的电阻值高8倍。肌纤维的简单电缆模型无法解释这些测量中发现的有效电阻差异；因此，提出了一种扩大的肌纤维电缆模型，并讨论了其生物学意义。当浴液中的钾浓度增加时，（用两组不同方法测量的）有效电阻降低。使用所提出的扩大电缆模型来解释这些结果表明，不仅膜电阻，而且肌浆电阻也会随着林格溶液中钾浓度的增加而降低。
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