Electroencephalography (EEG)

Electroneurodiagnostics

Electroneurodiagnostic (END) technology is the study and recording of electrical activity of the brain and nervous system. Technologists record electrical activity arising from the brain, spinal cord, peripheral nerves, somatosensory or motor nerve systems using a variety of techniques and instruments. A neurologist interprets the test results and reports these findings to referring physicians as necessary.

Common electroneurodiagnostic procedures include the electroencephalogram (EEG), long-term monitoring, evoked potential studies, and nerve conduction studies.

Electroencephalogram (EEG)
The EEG is a recording of the on-going electrical activity of the brain. An EEG can assist in the diagnosis of a variety of neurological problems-from common headaches and dizziness to seizure disorders, strokes and degenerative brain disease. The EEG is also used to determine organic causes of psychiatric symptoms and disabilities in children.

Sleep-Deprived EEG
This test is similar to a regular EEG, as described above, except that you will be asked to achieve 4 fewer hurs of normal sleep or as directed by your provider prior to your exam.

Ambulatory EEG

This test is similar to a regular EEG, as described above, except without video and takes place in the comfort of your home.

Overnight Video EEG / Long Term Monitoring (LTM)

An overnight video EEG is a prolonged EEG study accompanied by continuous video monitoring, which can record both the clinical events and EEG recording to aid in the diagnosis of seizures and other neurological disorders. You will have electrodes placed with a water-soluble paste and be monitored during the afternoon and into the evening.

Evoked Potentials (EP)
The Evoked Potential is a recording of electrical activity from the brain, spinal nerves, or sensory receptors that occurs in direct response to external stimuli. EP waveforms require sophisticated computer equipment to extract data that will allow physicians to determine the functional state of these pathways. This test is commonly performed by the technologist during surgery on the spine to help the surgeon make sure nerves are not damaged during the operation. Evoked Potentials are also performed in a clinical END laboratory, using either earphones to stimulate the hearing pathway, a checkerboard pattern on a TV screen to stimulate the visual pathway, or a small electrical current to stimulate a nerve in the arm or leg.