COMPARISON OF QUARTZ AND LEAD ZIRCONATE TITANATE EFFECT IN THE MANUFACTURE OF ACOUSTIC MICRO PROBE TO STIMULATE THE NEURAL TISSUE AND CREATE AN ACTION POTENTIAL AND ITS SIMULATION BY COMSOL MULTIPHYSICS SOFTWARE

In this paper, design and simulation of acoustic micro probe made of piezoelectric materials such as Lead Zirconate Titanate (pzt) and Quartz to stimulate nerve tissue and produce the wave of action potential in order to transmit the nerve messages inside of axoplasm of an axon have been explored. The simulation has been performed. by using the Comsol Multiphysics 3.5a software. In this simulation, we have designed a piezoelectric blade that part of it is placed inside of ionic enviroment that made of saline matter. By applying the voltage on outer side of blade, due to piezoelectric materials propertis, the blade vibrated and lead to displacement of sodium and chloride ions. This movement of ions creates a current within the ionic enviroment. Then, by applying the obtained current as input to fitzhugh nagumo model,we succed to produce the wave of action potential inside of axoplasm of an axon. The remarkable thing is that, in simulation of piezoelectric blade we used Lead Zirconate Titanate and Quartz and after completing the simulation process, Despite the large difference in the density of the material, due to the proximity of the voltage value at the different time of propagation of the action potential, less dense materials such as quartz can be used in acoustic micro probe designation in order to nerve stimulation .