抄録
1. With intracellular microelectrodes electric responses of the catfish Mauthner cell to antidromic stimulation were recorded. The responses were composed the parts, namely of brief cell-body responses and long dendritic responses.
2. The duration of the cell-body response was 1-1.5 msec. and that of the dendritic response longer than 7 msec.
3. Due to this great difference in the spike-duration and the difference in refractoriness between the cell body and the dendrites, multipe responses of the cell body were frequently observed during the course of a single dendritic response.
4. The possibility of injuring a neurone by insertion of a microelectrode was stressed.
