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Clinical Electroneurodiagnostic Program
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Clinical Electroneurodiagnostic Program


The Clinical Electroneurodiagnostic Program team performs electroencephalogram (EEG) and Evoked Potentials and EMG/Nerve Conduction studies for patients with neurological disorders affecting the brain and spinal cord, and muscles.

About the Program’s Studies:

Electroencephalogram (EEG)

Electroencephalogram (EEG) and video electroencephalogram (vEEG) tests are effective in evaluating a number of conditions, but are especially effective in diagnosing and evaluating seizures and epilepsy. Other conditions assessed with an EEG include sleep disorders, febrile seizures, confusional episodes, language disorders, movement disorders, and at times, headache.

An EEG measures and records the electrical activity of the brain. During the procedure, we attach special sensors (electrodes) to the scalp hooked by wires to a computer. The computer records the brain's electrical activity and displays it as wavy lines. Certain conditions, such as seizures, can be seen by the changes in the normal pattern of the brain's electrical activity.

A routine EEG (about one hour) records the brain activity both when the child is awake and asleep, if possible.

Children’s Clinical EEG program also links EEGs with video monitors for video EEG – or vEEG. These tests involve monitoring the child with both an EEG and video camera, so doctors can track both brain wave activity and record visual observations, such as seizures. The video EEG may last from several hours to several days, depending on what the neurologist is trying to observe. Longer tests help detect brain wave activity that occurs infrequently, such as activity that occurs during a seizure.

Evoked Potential Test

Evoked potentials tests measure hearing (BAER, or brainstem audio evoked response) or visual function (VEP, or visual evoked potential). We place electrodes on the scalp, similar to an EEG.

If the test is for hearing, sound stimulus at varying intensities is directed to each ear by using headphones, and the BAER records the brain’s response to the sound. When the test is for vision, flashing lights stimulate the eye, and the VEP records the brain’s response. 

Electromyogram (EMG)

Neurologists with special training in nerve and muscle disorders also perform tests to evaluate muscle and nerve function. EMG, or electromyogram, assesses the electrical function of muscles. Nerve conduction velocity (NCV), measures the speed of the nerve conduction. Doctors use these tests to evaluate the presence of muscle disease, inflammation of nerves, compression of nerves, or a variety of other disorders, which affect the nerve or muscles.

- Departments & Programs - Children's National Medical Center