In order to exclude the difference in the sensitivity of each sample, we use the inverse of the latency as reasonable parameter represented the stimulus strength. The maximum value of firing rate and mean value up to 50 msec are expressed by power function of this parameter. On the other hand, interspike-interval during the bending stimulus are shown as multimodal distributions. Every interspike-interval from a peak to a next peak is a constant value (8.3 msec). We lead to the existance of an oscillator system units.