Patent Document ID: 9381356
Application ID: 14117149
Patent Flag: 1

Claim One:
1. An automated method of controlling a neural stimulus, the method comprising: applying the neural stimulus to a neural pathway in order to give rise to an evoked action potential on the neural pathway, the stimulus being applied as defined by a set of parameter values; measuring a neural compound action potential response evoked by the stimulus and deriving from the measured evoked response a feedback variable; comparing the feedback variable to a therapy map, the therapy map defining a therapeutic relationship of control variable to feedback variable, and determining from the therapy map a required change in the control variable in order to improve alignment of the feedback variable with the therapy map; altering one or more of the stimulus parameter values to effect the required change in the control variable; and iteratively performing the applying, measuring, comparing and altering, in order to improve alignment of the feedback variable with the therapy map over time; wherein the feedback variable is a type of measure of evoked response strength, and the control variable is a type of stimulus intensity, and the therapeutic relationship represents a locus defining a desired output measure of evoked response strength for a given input stimulus intensity, with the desired output measure of evoked response strength being defined in a manner which varies for varying stimulus intensity.