Systems and methods for tissue stimulation in medical treatment

A system for providing enhanced targeted brain stimulation to a patient's brain, the system comprising;

• a. a stimulation subsystem coupled to at least two stimulation conduits, wherein the stimulation subsystem provides at least two unique stimulation signals to the conduits, said signals each having the majority of their spectral energy within a first band, said signals configured to produce a field summation signal which when rectified has the majority of its energy within a second band;
• b. a control subsystem having a processor which is operative to cause the stimulation subsystem to initiate application of the desired field summation signal;
• and,
• c. at least two stimulation conduits located in sufficiently close proximity to enable said field summation to occur.

A method for providing enhanced targeted brain stimulation to a patient's brain, the system comprising;

• a. stimulating with a stimulation subsystem coupled to at least two stimulation conduits, wherein the stimulation subsystem provides at least two unique stimulation signals to the conduits, said signals each having the majority of their spectral energy within a first band, said signals configured to produce a field summation signal which when rectified has the majority of its energy within a second band;
• b. operating a processor of a control subsystem to cause the stimulation subsystem to initiate application of the desired field summation signal;
• and
• c. locating the at least two stimulation conduits so that these are in sufficiently close proximity to enable said field summation to occur.

A method for treating a patient with targeted stimulation comprising;

• a. selecting a stimulation signal which stimulates a target region to produce therapeutic benefit;
• b. creating two or more sets of two or more partial signals which will create a vector field approximately identical to the stimulation signal when these are applied at selected contacts;
• c. applying each set of the sets of partial signals;
• d. selecting at least one set of partial signals which contain advantageous characteristics;
• and,
• e. using the at least one set of partial signals to provide therapeutic stimulation.