Evoked Potentials (EP)

These tests are the visual evoked potentials (VEP), the brainstem auditory evoked potentials (BAER) and the somatosensory evoked potentials (SEP)

VEP

Visual Evoked Potentials (VEP)

This test records the response of the brain’s visual centre to a checkerboard picture or flashing light.

This test checks the visual pathway and ensures that the brain is receiving information about what we see.

Patient handout

Visual Evoked Potentials (VEP) pamphlet

Preparation

It is important that your child is awake and alert for this test

Do not sleep deprive your child

Children who wear glasses or contact lenses should wear these during the test

All children must have clean, dry hair (no gel, hairspray or oil)

BAER

Brainstem Auditory Evoked Potentials (BAER)

This test records how long it takes for sound to travel from the ear to the brain.

This test does NOT test how well your child hears.

Earplugs or headphones deliver a clicking sound to each ear.

Patient handout

Brainstem Auditory Evoked Response

Preparation

Most children are sedated for this test as it is very important for them to lie still. See instructions for sedation.

Your child MUST be sleep deprived the night before the BAER. See instructions for sleep deprivation.

SEP

Somatosensory Evoked Potentials (SEP)

This test checks how well the spinal cord conducts a message from the arms and legs to the brain.

Your child will feel a 'tingling' sensation, or their big toe or thumb might twitch. This does not hurt but may feel uncomfortable.

Patient handout

Somatosensory Evoked Potentials (SEP) handout

Preparation

Most children are sedated for this test as it is very important for them to lie still. See instructions for sedation.

Your child MUST be sleep deprived the night before the SEP. See instructions for sleep deprivation.

Please wear loose clothing or bring shorts and a t-shirt to change into.

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