Evoked potentials (EPs) tests

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Evoked potential (EP) tests measure brain function in response to stimuli of different modalities. Read about visual, auditory and somatosensory EP tests.

Key points

  • Evoked potential tests check how well messages travel through different nerves to the brain.
  • There are three types of EPs: visual EPs (VEP), somatosenory EPs (SEP) and brainstem auditory EPs (BAEP).
  • If your child cannot be still during the test, they may have to take a sedative.
  • The tests take about 30 to 45 minutes each and are not painful.
Last updated: November 6th 2009