A method, system, and an apparatus are provided for providing an electrical neurostimulation therapy to a patient. The method comprises generating an electrical biasing signal defined by a plurality of parameters, at least one of which comprises a random value within a defined range, and applying the electrical biasing signal to a neural structure to bias an intrinsic neural signal on the structure. Neurostimulators and neurostimulation systems are provided for generating such a biasing signal and applying the signal to the neural structure, and include a stimulus generator for generating the signal, one or more electrodes for delivering the signal to a neural structure, and a controller for applying the signal to the electrodes.