Voltage-current characteristics of the electrotactile skin-electrode interface

Experimental results showing that the static skin-electrode resistance decreases nonlinearly with increasing stimulation current during electric stimulation of the sense of touch are reported. A mathematical model that describes the electrotactile skin-electrode interface is presented. The voltage versus time response of an electrode stimulation with constant-current pulses is also modeled, and two possible explanations for this characteristic are provided.<<ETX>>