A method, apparatus, and system for affecting neuromodulation based upon an evoking signal applied to a patient's body. An internal and/or external evoking and/or therapeutic signal is applied to a first target portion of a patient's body. Data relating to a physiological response resulting from the...http://www.google.co.uk/patents/US20070179557?utm_source=gb-gplus-sharePatent US20070179557 - Controlling neuromodulation using stimulus modalities
