Patent ID: 8068912

Claim:
A non-transient computer-readable medium storing a software application executable by a processor and comprising instructions that, when executed by the processor, cause the following functions to be performed: (a) deliver a plurality of stimulation current signals to tissue including or adjacent to a spinal nerve, (b) in response to delivery of each one of the plurality of stimulation current signals, receive a plurality of voltage response values detected by a plurality of leg muscle sensor electrodes coupled to different leg muscles, (c) determine the value of an unknown threshold nerve stimulation current amplitude required to evoke a threshold voltage response from at least one of the leg muscles using the steps of: bracketing the unknown threshold nerve stimulation current amplitude by determining a first stimulation current amplitude that does not evoke the threshold voltage response from any of the leg muscles and a second stimulation current amplitude that does evoke the threshold voltage response from at least one of the leg muscles, repeatedly bisecting the bracket that includes the threshold nerve stimulation current amplitude until a final bracket of a predetermined width is reached, and selecting the threshold nerve stimulation current amplitude from the final bracket; (d) determine which range from a predetermined group of ranges the determined threshold nerve stimulation current amplitude is located in; and (e) display the determined threshold nerve stimulation current amplitude in units of mA on a display device along with a color-coded indicator corresponding to the determined range from the predetermined group of ranges.