1. A system for detecting one or more central auditory potentials, said system comprising: an implantable cochlear stimulator configured to be fully implanted within a patient and to generate and apply a stimulation current by way of one or more electrodes implanted within a cochlea of said patient in accordance with one or more stimulation parameters; a signal processing unit housed within a single casing and configured to be located external to said patient and communicatively coupled to said implantable cochlear stimulator, the signal processing unit comprising a port and further configured to generate the one or more stimulation parameters; and one or more electrodes configured to be removably coupled directly to the port of said signal processing unit; wherein said signal processing unit is configured to use said one or more electrodes removably coupled directly to said port of said signal processing unit to detect said one or more central auditory potentials and wherein said signal processing unit is configured to process said detected one or more central auditory potentials.