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The EEG is considered safe and has been used for many years, and it causes no noticeable discomfort. These include:ĮEGs may also be used to confirm brain death in someone in a persistent coma, or to help monitor blood flow in the brain during surgery. Your doctor will typically evaluate about 100 pages or computer screens of brain activity, looking for basic waveform, bursts of energy and responses to stimuli like flashing lights.ĮEGs are used to evaluate several different types of brain disorders. These electrodes are able to detect tiny electrical charges that result from brain cell activity-these charges are amplified and projected as a graph on a computer screen or piece of paper. This test is called an electroencephalogram, or an EEG.ĭuring an EEG, electrodes made up of small discs and thin wires are attached to your scalp. In order to diagnose the condition caused by these interruptions, your doctor will perform a test that detects electrical activity in the brain. Interruptions to these impulses can cause several problems in the brain. Your brain cells communicate via electrical impulses, even while you sleep.