Somatosensory Evoked Potential (SEP)

SEP or Somatosensory Evoked Potential is a diagnostic test that evaluates the neuro pathways between the peripheral and central nervous system.

The test is usually performed to evaluate multiple sclerosis, peripheral neuropathy and problems with decreased strength or sensation. SEP testing can be done on the arms or the legs.

Sometimes physicians will order SEP testing on all limbs. SEPs on the arms and legs each require approximately 90 minutes for testing.

Common Misconceptions

Many patients confuse the SEP with the EMG (electromyogram). The SEP, however, does not involve needles that deliver shocks into the muscles.

There is no shaving or hair cutting with an SEP. Patients are allowed to have their family members in the room during the test. No small children please.

Test Results

A neurologist will interpret the SEP and results will be made available to your primary care physician within seven to ten business days.