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The EP is a recording of electrical activity from the brain, spinal nerves or sensory receptors in response to specific external stimulation. Hundreds of responses are received, amplified and averaged by a computer. The final response is plotted on a graph and intercepted by a physician who looks for particular waveforms and the time it takes for them to occur.
Evoked potentials are helpful in evaluating a number of different neurological problems, including spinal cord injuries, acoustic neuroma and optic neuritis, and each type of EP looks at a different neurological pathway. The three most common types are the brainstem auditory evoked potential (BAEP), visual evoked potential (VEP), and somatosensory evoked potential (SSEP).
For more information, please call the Department of Neurophysiology/EEG at Baylor All Saints Medical Center at 1.800.4BAYLOR.
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