[Relationship between potential and impedance change associated with excitation of the nerve (author's transl)]

The action potential or the potential change and the impedance change associated with excitation of the sciatic nerve and electric nerve model (ENM, the equivalent circuit of the nerve fiber), were recorded by means of AC bridge supplied of AC of 13 kHz. Records were taken in excitation at the stimulated site by the square current of different duration, exponentially increasing current of different increasing gradient. Records were also taken in propagated excitation, in excitation elicited in refractory period and at the polarized site of the inactive nerve and ENM. By observation of these records, the following results were obtained.1. With respect to potential changes in nerve, two kinds of changes were found, namely, the one was in cause and effect relationship with the impedance change and the other was without relation to impedance change. 2. In the course of the action potential, both kinds of potential changes were found.