Design and Simulation of an Acoustic Micro Prob Made of Piezoelectric Materials to Stimulate Nerve Tissue and Generate Action Potential

Abstract

In this study , design and simulation of an acoustic micro probe which is employed to form controlled ionic beam inside axoplasm of an axon have been explored . the probe is made of piezoelectric material . this beem is designed so that it can stimulate a nerve to generate action potential . 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 in an ionic environment . By applying an external voltage to the other side of the blade and due to the properties of piezoelectric materials, the blade will vibrate. This vibration causes the displacement of the ions in the ionic environment and leading to the produce current . By applying the current that obtained to FitzHugh-Nagumo model of nerve, which is models the excitable site of axon , Action potential inside of the axon will be produced and propagated . the simulation results show the feasibility of method and its corresponded conditions .Nowadays the piezoelectric effect is useful in many applications that involve electronic frequency generation ,the production and detection of sound, generation of high voltages, microbalances, lighters, loudspeakers, signal transducers and etc.