Electroencephalograph
An electroencephalograph (EEG) is a medical device that is used to measure the electrical activity of the brain. It consists of a series of electrodes that are placed on the scalp, and it records the brain’s electrical activity through the electrodes as changes in voltage.
EEG is a noninvasive procedure that is commonly used to diagnose and monitor a variety of neurological conditions, such as epilepsy, brain tumors, and sleep disorders. It is also used to evaluate brain function in other situations, such as during surgery or to monitor the brain activity of coma patients.
EEG results are typically recorded as a series of brain waves, which are changes in the electrical activity of the brain that can be measured using the electrodes. Different types of brain waves are associated with different brain states, such as wakefulness, sleep, and relaxation, and the patterns of brain waves can provide important information about brain function and activity.