Information about the spatial distribution of the electric field can be obtained by measuring the electrode impedance as a function of the diameter of the electrolyte surrounding the electrode. The non-uniform distribution of the electric field around the electrode is supported by the variation of the geometry factor (GF) with the electrical conductivity and geometry of the volume conductor. A comparison of the values obtained for the GF from experimental data, from model calculations and simulations help to understand the non-uniform distribution of the electric field. The GF calculated from four-electrode-measurements is significantly higher. GF should be used with caution in calculations of the deep brain stimulation (DBS) electrode impedance.
|Name||Materials Science Forum|
|Publisher||Trans Tech Publications Ltd|
|Conference||6th International Materials Symposium, Materiais 2011|
|Period||18/04/11 → 20/04/11|
- Deep brain stimulation
- Dielectric measurements
- Electric field distribution