Enhanced system and method for evoked potential classification

A neurostimulation device, the device comprising:

• a stimulation circuit configured to deliver electrical neurostimulation to a subject when coupled to an implantable stimulation lead;
• a sensing circuit configured to sense electrical signals when coupled to the stimulation lead;
• a control circuit operatively coupled to the stimulation circuit and the sensing circuit, and configured to initiate delivery of neurostimulation to the subject and record sensed electrical signals resulting from the neurostimulation;
• and
• signal processing circuitry configured to:
• extract one or more features from the recorded electrical signals;
• detect clustering of the one or more extracted features of the recorded electrical signals;
• and
• classify a recorded electrical signal as an evoked response signal of interest according to the detected clustering of the one or more extracted features of the recorded electrical signals.

A non-transitory computer readable storage medium including instructions that when performed by processing circuitry of a neurostimulation system, cause the neurostimulation system to perform actions including:

• delivering neurostimulation energy to at least one implantable neurostimulation lead of the neurostimulation system;
• recording electrical signals sensed using the implantable stimulation lead;
• extracting one or more features from the recorded electrical signals;
• detecting clustering of the one or more extracted features of the recorded electrical signals;
• classifying the recorded electrical signals as either an evoked response activity signal or a signal artifact using the clustering of the one or more extracted features of the recorded electrical signals;
• and
• adjusting the neurostimulation based on the one or more extracted features of at least one identified evoked response signal.