What is EEG?
An electroencephalogram (EEG) is a test used to find problems related to electrical activity of the brain.
An EEG tracks and records brain wave patterns. Small metal discs with thin wires (electrodes) are placed on the scalp, and then send signals to a computer to record the results. Normal electrical activity in the brain makes a recognizable pattern. Through an EEG, doctors can look for abnormal patterns that indicate seizures and other problems.
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Why an EEG?
An EEG is used to detect problems in the electrical activity of the brain that may be associated with certain brain disorders. The measurements given by an EEG are used to confirm or rule out various conditions, including:
- seizure disorders (such as epilepsy)
- head injury
- encephalitis (inflammation of the brain)
- brain tumor
- encephalopathy (disease that causes brain dysfunction)
- memory problems
- sleep disorders