EEG ( Electroencephalogram )

a. The electrical signals called brain waves are generated by neurons close to the brain surface, mainly neurons in the cerebral cortex which can be detected by sensors called electrodes. The electrodes are placed on the forehead and scalp. A record of such waves is called an electroencephalogram or EEG.

b. EEG is useful in studying normal brain functions, such as changes that occur during sleep, and in diagnosing a variety of brain disorders, such as epilepsy, tumours, trauma, hematomas, metabolic abnormalities, sites of 10 trauma and degenerative diseases. The EEG is also utilized to establish or confirm that brain death has occurred.