Current Distributions Produced by the Banded Electrode Array: An Experimental Study Conducted with a Tank Model

The tank model consisted of a 22-band electrode array lying in a homogeneous normal saline solution in the base of a tube 5 mm in diameter and 4 cm in length. The current distribution was obtained by measuring vector potentials along the longitudinal direction at a given radial distance from the electrode array. The results indicate that when only one pair of electrodes is stimulated, the current distribution is bell shaped. When two pairs are simultaneously stimulated by two isolated current sources, the results demonstrate a vector summation of current density throughout the system.