Techniques for adjusting the locus of excitation of neural tissue in the spinal cord or brain

摘要

A method of controlling a volume of neural tissue stimulation with electrodes placed in the intraspinal tissue, on the surface of the brain or deep in the brain in which first, second and third electrodes are implanted in or adjacent to the desired neural tissue. Anode/cathode relationships are established between the electrodes and pulses are presented to the electrodes so that fibers or cell bodies in said neural tissue are activated. Amplitude and/or pulse width of the pulses are varied to steer the locus of cell body or axon activation.