![]() ![]() ![]() ![]() In some patients a short EEG will be taken while in others a prolonged EEG overnight or even longer may be required. The shape, frequency, amplitude and other characteristics of the trace from various regions of the brain are interpreted by a physician, usually a neurologist, and can reveal changes in the electrical activity of the brain.Įvaluation with an EEG varies depending on the clinical situation. The electrodes record electrical activity from the surface of the brain which is converted to a trace on the electroencephalogram output, traditionally wiggly lines on a sheet of paper although nowadays they are often simply displayed on a computer screen. In some cases where a continuous EEG is to be taken for a prolonged period of time, such as in a comatose head trauma victim, the electrodes can be implanted in the scalp as tiny needles. Generally, these are superficial stickers which are attached to wires which carry information to the monitor which displays the results. The EEG is performed by placing electrodes on the scalp. What Is It?An electroencephalogram (EEG) is a neurological test which records the electrical activity at the surface of the brain by way of electrodes placed on or in the scalp. ![]()
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