An electroencephalogram also known as EEG, is a test that measures and records the electrical movement of your cerebrum(brain). The movement of your brain is recorded on paper as wavy lines or through a computer on a screen. An electroencephalogram (EEG) is done to analyze epilepsy, dementia, coma, consciousness, and sleep disorders.Likewise, while a man is getting general anesthesia during a brain surgery, physical or mental issue and sensory system. EEG is one the most exact and utilitarian test in affirming a determination. Different tests that might likewise be done incorporate video EEG, Brain mapping, and Ambulatory EEG checking. Video EEG records seizures on videotape and on a computer to see what happens just before, during and after a seizure. Brain mapping is another system that is fundamentally the same to EEG, with cathodes set on a man's scalp to transmit the cerebrum's movement. Wandering EEG checking, the individual can move around, and the test takes into consideration drawn out stretches of time in recording of electrical activity in the brain.