Somatosensory Evoked Potential (SSEP) is a noninvasive diagnostic test to assess the speed of electrical conduction across the spinal cord. The technique involves applying electrical stimulus at specific nerves in the arms and legs and measuring the impulses generated by the stimulus at various points in the body. If the spinal cord is pinched, the electrical signals will travel slower than usual. SSEP may also be used to monitor spinal cord function during surgical procedures, particularly for cervical or thoracic spine surgery.