1. An apparatus for delivering electrical stimuli to an auditory system of an implantee, comprising: an stimulator configured to generate stimulation signals having the stimuli encoded therein; and at least one electrode member configured to deliver the stimulation signals to the auditory system; wherein the stimuli comprises plasticity informative stimuli having a magnitude below an auditory perception threshold of the implantee, the plasticity informative stimuli configured to facilitate the production and/or release of naturally occurring neurotrophic agents into the auditory system.