Articles techniques et présentations

To achieve a deeper understanding of the mechanism of the Deep Brain Stimulation (DBS) scientists use more and more numerical simulations. DBS inhibits overreaching brain activity via electric pulses that send into the brain by electrodes. Different electrode parameters such as geometry, frequency of stimulated impulse or applied voltage have a great influence on the size of the stimulated volume. To compare electrodes of different shape we use the cell constant and the impedance spectroscopy. The latter, describes properties of electrodes in frequency range. For our first model we have chosen sodium chloride solution as surrounding medium in the simulations. This solution accords to the physiological fluid in the brain.