Electrophysiology System With Mapping Stimulation

A method of building a recruitment curve for a spinal cord stimulation electrode array, the method comprising:

• delivering, at a first stimulation frequency of between about 1 Hz and 2 Hz, a series of electrical stimulation pulses to a selected electrode of an electrode array, beginning at or below a motor threshold amplitude;
• incrementally increasing the stimulation amplitude until a saturation amplitude is reached for at least one muscle of interest or until a predetermined maximum stimulation amplitude is reached;
• recording evoked CMAP activity from a plurality of muscles for each stimulation amplitude;
• repeating the delivering, incrementally increasing, and recording steps for each electrode in the electrode array;
• identifying, for each muscle, a maximum CMAP amplitude across all electrodes and all stimulation amplitudes;
• normalizing each individual CMAP amplitude for each muscle using the identified maximum CMAP amplitude;
• and
• generating a recruitment curve plot of normalized CMAP amplitude versus stimulation amplitude for each electrode and each muscle.