Abstract
The touch sensitivity increases temperarily when the proximal phalange of finger is pressed. While there are four kind of tactile receptors in finger tip, it is well known that each mechanoreceptor is activated with different frequency. By focusing on this fact, we can evaluate which receptor mainly contributes to improving the touch sensitivity by pressing. By observing frequency response of touch sensitivity, we found that it increases in the frequency range of 80 through 120 Hz under pressing. Also, we could observe that the tendency of sensitivity response with respect to time is quite similar to that of stiffness change of finger tip.
