Impedance Modeling of Intracortical Microelectrode for a Reliable Design of Brain Activity Recording System

Daniela De Venuto1,  Peter Ledochowitsch2,  Michel Maharabitz2,  Jan Rabaey2
1Politecnico di Bari, Italy, 2UC Berkeley (CA) USA


The possibility to use an electrical model empirically tuned with the probe impedance detected by in vivo measurements is here investigated. The model is proposed to make reliable preamplification stage that can follow the changes in the probe impedance after the implant in long term recording.. The simulation results here shown and compared with in vivo measurements look promising.