Three neurophysiological measures are registered: MEP (motor evoked potentials), SSEP (somatosensory evoked potentials) and NCV (nerve conduction velocity).
From: Washington University Neuroscience
MEPs and SSEPs of the tibials and ulnaris nerves quantify the status of the efferent and afferent pathways in the spinal cord. In comparison to the ISNCSCI protocol measures the evoked potentials are independent of the cooperation and consciousness of the patient. The NCV are used for diagnosis of peripherical nerve lessions.
Physiological SSEP of the tibialis nerve