1. A method for electrically interacting with a neural tissue using an electrode array located within a ventricular compartment of a brain, the method comprising: selecting a portion of neural tissue for electrical interaction; accessing previously stored registration information regarding a location of the electrode array within the ventricular compartment of the brain; selecting one or more electrodes in the electrode array for electrical interaction based on the registration information; and interacting with the neural tissue with the selected electrodes, wherein interacting with the neural tissue comprises at least one of forming an electrical field beam distributed in a three-dimensional space using the selected electrodes and localizing electrical activity in the brain using the selected electrodes distributed in the three-dimensional space.