Abstract
The authors traced the recovery cycle of the nerves under catelectrotonus, and compared it with the normal recovery cycle. In the normal recovery cycle, the absolute refractory period, relative refractory period, supernormal period and subnormal period occurrs in succession, then it goes back to the normal excitability level. Under catelectrotonus, however, quasi periodic oscilation occurs, and the cycle tends to become shorter as the strength of the current given. According to Monnier, although repetitive response occurs under normal condition in the normal excitable tissue, the action of the damping factor prevents its manifestation. The authors presumed that the spontaneous appearance of the repetitive response induced by the action of Nacitrate or others is due to the above damping factor. From the above view point it can be presumed that also the catelectrotonus evidently has an inhibitory action against the damping factor.
