A desired effect is produced by therapeutically activating tissue at a first site within a patient's body and a corresponding undesired side effect is reduced by blocking activation of tissue or conduction of action potentials at a second site within the patient's body by applying high frequency stimulation...http://www.google.com/patents/US7433734?utm_source=gb-gplus-sharePatent US7433734 - Apparatus and method for blocking activation of tissue or conduction of action potentials while other tissue is being therapeutically activated
