EEG

An electro encephalogram (EEG) is a test that measures and records the electrical activity of the brain. Most commonly, it is used to show the type and location of the activity in the brain during seizure. It is also used to evaluate people who are having problems associated with brain function. These problems include confusion, coma, long term difficulties with thinking or memory.

The electroencephalogram (EEG) is a measure of brain waves. It is a readily available test that provides evidence of how the brain functions over time.

Video EEG : Video EEG records seizures on videotape and on computer so that the doctor can see what happens just before, during, and right after a seizure. It's helpful in diagnosing psychogenic seizures, which may look like real seizures but do not affect the electrical activity in the brain. Video EEG may be used short-term or long-term:
Short-term monitoring is done on an outpatient basis and may last up to 6 hours.
Long-term monitoring is done in the hospital and may last 3 to 7 days.

Brain mapping : Brain mapping is a fairly new method that is very similar to EEG. With electrodes placed on the person's scalp to transmit the brain's electrical activity, a computer makes a color-coded map of signals from the brain.

Ambulatory EEG monitoring : In ambulatory EEG monitoring, the person is able to move around, and the test allows for long periods of time in recording of electrical activity in the brain. Fewer electrodes are attached to the person, and the person carries a small, portable recording unit. The recording may last for a full day or more, and the person is allowed to leave the hospital.