Matumoto M
Nihon Seirigaku Zasshi. 1980;42(1):3-14.
An excitable tissue, namely a nerve or muscle fiber was regarded as an excitable system consisted of "field of excitation" and "active element" and the nerve fiber especially as a double polarized excitable system, because its equivalent circuit in resting state was constituted of two polarized layers. On the above view point, the author stated the action potential of the double polarized excitable system as the following. In the double polarized excitable system, the inner layer is polarized Em by itself, while the outer layer surrounding out side the inner layer is polarized Eo due to discharge current of Em. Then the cell potential (resting potential) Ec, the potential difference between in and out side of the system, is represented as Ec=Em-Eo. Excitation is referred to the temporary change of the equivalent circuit of resting state to that of excited state by temporary state by temporary reduce of resistance of inner layer nearly to zero, resulting temporary decrease of Em and change of Ec (action potential). Through the event, decrease of resistance of the inner layer is the root of the process, so was named active element, and the other electric constitution as field of excitation. Theoretically calculated and experimentally recorded action potential of this system showed every course of the action potential of the nerve fiber known already, including overshoot or undershoot (positive after potential).
一种可兴奋组织，即神经或肌肉纤维，被视为由“兴奋场”和“活性元件”组成的可兴奋系统，而神经纤维尤其被视为双极化可兴奋系统，因为其静息状态下的等效电路由两个极化层构成。基于上述观点，作者对双极化可兴奋系统的动作电位作了如下阐述。在双极化可兴奋系统中，内层自身极化至Em，而围绕内层外部的外层由于Em的放电电流而极化至Eo。那么细胞电位（静息电位）Ec，即系统内外的电位差，可表示为Ec = Em - Eo。兴奋是指通过内层电阻暂时降至几乎为零的暂时状态，使静息状态的等效电路暂时转变为兴奋状态，导致Em暂时降低以及Ec改变（动作电位）。在这个过程中，内层电阻的降低是该过程的根源，因此被命名为活性元件，而其他电学构成则称为兴奋场。该系统的理论计算和实验记录的动作电位显示出了神经纤维已知的动作电位的每一个过程，包括超射或低射（正后电位）。
