EVOKED POTENTIAL TESTING
VEP-Visual Evoked Potential
The visual evoked potential records the amount of time it takes
for an impulse to go through the optic pathway to the brain. The
test is performed by a well-trained neurodiagnostic professional
who will apply electrodes on several measured areas of the scalp
attaching the electrodes with a conductive paste. Both eyes will
be tested individually.
Duration: Approximately 45-60 minutes
BAER-Brainstem Auditory Evoked
The brainstem auditory evoked potential test records the time it
takes for your brainstem to respond to repeated stimuli (clicking
noise). The test is performed by a well-trained neurodiagnostic
professional who will apply electrodes on several measured areas
of the scalp with a conduction paste. Each ear will be tested
SSEP-Somatosensory Evoked Potential
The somatosensory evoked potential records the nerve impulses to
the brain. Your scalp, shoulder blade, and/or knees and back are
measured and prepped with a skin-prep solution. A member of the
neurodiagnostic staff will apply electrodes on these areas. When
testing, a bar electrode is placed on the nerve that is
stimulated. The patient will feel a small electrical shock. The
electrical stimulation will cause twitching and a tingling
sensation. The point of the test is to record the amount of time
it takes for this impulse to travel to the brain.
Preparation for Evoked Potential Testing:
Hair should be washed on the morning of the test and left clean
and dry. Hair needs to be unbraided; and hair accessories are
only permitted prior to the actual start of the test.
DO NOT USE HAIR SPRAYS, OILS, SETTING GELS, OR CHEMICALS
ON YOUR HAIR THE DAY OF THE TEST.
- Arrive at least 30 minutes prior to appointment time to allow
- Please bring your insurance card and any co-payments or
- Take all medications as requested by your referring
physician. Please be aware that certain medications (such as
benzodiazepines, sedatives/tranquilizers, muscle relaxants,
sleeping aids, or medicines used to treat seizures) may affect
the test. However, you should not adjust your medications in any
way unless instructed to do so by your physician.