Study on the Effect of Deep Brain Stimulation Electrode Geometry on Stimulation Range and Discharge Safety Based on COMSOL Muliphysics

Deep Brain Stimulation (DBS) has become a very effective way to treat addiction, depression, and other neurological disorders compared to medications. It stimulates specific areas of the brain through electrodes to regulate various abnormal symptoms. The shape of the electrode affects the discharge range and charge density distribution, which has a great impact on the range of action and safety of the stimulus. Experiments Simulation experiments are performed using COMSOL muliphysics simulation software. By changing the parameters of the position of the electrode terminals and the shape of the electrodes, their discharge behavior is studied. The results showed that the annular electrode with a specific ratio of internal and external radius had a larger stimulation range; a specific upper and lower bottom radius and has better safety performance than truncated cone electrodes. Through the study of the above results, the electrode shape of DBS can be optimized according to clinical needs. By applying these results, the therapeutic effect of DBS can be further improved and a new experimental basis can be provided for the continuous development of brain-computer interaction technology.