Measuring finger peripheral signal based on electrical synchronization

In this paper, we propose a method to measure tactile nerve signals on the skin noninvasively. The natural tactile nerve signals generated by mechanical touches are hidden behind thermal noises on the skin. In our method, we observe the tactile signals while synchronizing the firing by electrical stimulation. We expect the power of synchronized nerve signals can exceed the thermal noise. Synchronization is realized simply by stimulating mechano-receptors with electrical impulses. After the impulse, the stimulated receptors cannot fire until the refractory period ends. Then all receptors under over-threshold stress are expected to fire simultaneously.