Figure 4

Optimization results when the region of interests (ROIs) were the left auditory cortex (LAC) and right auditory cortex (RAC) with an optimal stimulation phase of the LAC leading the RAC by 90°. (a) Optimal injection current amplitude (left) and phase (right) distributions for all 61 channels. (b) Electric field amplitude (left) and phase (right) distributions under the optimal injection current condition. (c) Optimal injection current amplitude (left) and phase (right) condition of electrodes exceeding 0.1 mA in the injection current amplitude. (d) Electric field amplitude (left) and phase (right) distributions under the optimal electrode condition over cortical regions where the electric field amplitude was greater than 0.05 V/m.