Somatosensory Service

This test examines the sensory system from the peripheral nerve to the sensory cortex of brain. Weak electrical stimuli are applied to the peripheral nerve, for example median or ulnar nerve for upper extremity study and tibial nerve for lower extremity study.

SSEP is recommended for following diseases:

  • Numbness / weakness of arm or leg.
  • Diseases of the spinal cord.
  • Multiple Sclerosis.

Details of Procedure:

  • The electrical stimulation is applied to nerve in the arm or the leg.
  • The response is recorded from the neck and the head by electrodes placed over the surface.
  • Mild pain is experienced when electrical stimulation is applied.


  • Should wear loose clothes, which will allow easy examination.
  • Fasting not required.
  • For children who are uncooperative sedation may be required.
  • There is no after effect following the test.
  • This is done as an outpatient procedure.

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