What are somatosensory evoked potentials (SSEP)?
Somatosensory evoked potentials evaluate the nerve pathway from the peripheral nerve in the arms and legs through the spine to the brain. Electrodes are attached to the scalp and at various other points along the nerve pathway. A small electrical current is applied to the skin near a nerve. This current creates a twitching/pulsating sensation at the patients wrist and ankle region. The current is not painful. Each arm and leg is tested separately. Why is the SSEP test performed? Somatosensory evoked potentials evaluate spinal cord injuries or diseases, neuromuscular disease and demyelineating diseases. It also is used to monitor the patient during surgical procedures. Test time: 2-3 hours (Length of time depends on whether the arms, legs or both are tested.) Patient Preparation The patient should eat regular meals. The patient should NOT consume coffee or tea four hours before the test. The patient should wear comfortable clothes, avoiding things such as pantyhose. The patient needs to
