1. A vestibular stimulation electrode lead for conducting electrical stimulation signals generated by an implanted vestibular stimulation module, the electrode lead comprising: an extra-vestibular lead branch configured for carrying the stimulation signals from the stimulation module to a vestibular entry location in an outer surface of a vestibular canal; a distal end of the lead branch bifurcating into a single array branch and a double array branch; wherein the single array branch forms a stopper collar by bending away at a first discrete angle from the single array branch to penetrate into the vestibular canal at the vestibular entry location, and an intra-vestibular electrode array bends away at a second discrete angle from the stopper collar along a line parallel to the lead branch so as to fit within the vestibular canal and having an outer surface with one or more electrode contacts for delivering the stimulation signals to vestibular neural tissue at a target location within a vestibular structure; and wherein the double array branch comprises a base hub and stopper bridge that form a forked shape with two intra-vestibular branch arrays located adjacent to each other, each intra-vestibular branch array having: i. one or more electrode contacts for delivering the stimulation signals to vestibular neural tissue, and ii. an end bump configured to limit post-surgical outward withdrawal of the intra-vestibular branch array; and wherein the single branch intra-vestibular electrode array and double branch intra-vestibular branch arrays are pre-shaped so that once one of the arrays is implanted, the other arrays will automatically be close to their insertion location.