1. A method for determining a system response for a neuronal region of interest (ROI), the method comprising: positioning an electrode proximate to the neuronal ROI, wherein the electrode is electrically coupled to a neurostimulation (NS) system; delivering, from the NS system, a stimulation waveform from the electrode based on NS parameters; programming one or more processors for: measuring an evoked potential waveform resulting from the stimulation waveform; comparing at least one excitation pulse within the stimulation waveform to the evoked potential waveform to obtain a candidate response function; and identifying a neuronal system response for the neuronal ROI based on the candidate response function.