Somatosensory Evoked Potential (ssep) is one test used to help in the
diagnosis of MS. Abnormalities with SSEPS are not specific for MS and can
be abnormal due to other disease processes. Information gained from the
SSEP in addition to clinical history, physical exam, MRI, and spinal tap
results can either support or refute the diagnosis of MS. The technique
consists of applying a 5-per second painless electrical stimulus at various
nerves in the arms or legs and recording at various locations (near clavicle,
cervical spine, and parietal cortex). The impulses generated by the stimuli
are averaged and the time the impulse takes to reach the various points
is measured. Abnormalities include slowing or blocking at the various points.
MS Glossary