A device for brain stimulation includes a lead having alongitudinal surface, a proximal end and a distal end； and a plurality ofelectrodesdisposed along the longitudinal surface of the lead near the distal end of thelead.The plurality of electrodes includes at least four segmented electrodes havingexposed surfaces where each exposed surface has a center point. The centerpoints of the at least four segmented electrodes are disposed on asubstantiallyhelical path about the longitudinal surface of the lead.
