Electroencephalograph

Electroencephalograph (EEG) is a diagnostic test that measures the electrical activity of the brain. It is used to detect abnormalities related to electrical activity of the brain and can assist in the diagnosis of various neurological disorders.

Overview

An Electroencephalograph is a non-invasive procedure that involves placing electrodes on the scalp to record electrical activity in the brain. The electrical signals are amplified and recorded as a series of waves. The patterns and rhythms of these waves can provide important information about the health and function of the brain.

Uses

EEGs are used to diagnose and monitor a number of conditions, including:

• Epilepsy: EEGs can detect abnormal electrical activity patterns that are characteristic of this condition.
• Sleep disorders: EEGs can help identify disruptions in normal sleep patterns.
• Brain tumors: EEGs can detect abnormal electrical activity that may be caused by a tumor.
• Brain damage: EEGs can help identify areas of the brain that have been damaged by stroke or trauma.
• Encephalitis: EEGs can detect abnormal electrical activity that may be caused by inflammation of the brain.

Procedure

During an EEG, electrodes are attached to the scalp using a special adhesive. The electrodes are connected to an amplifier and a recording device. The patient is asked to relax and remain still during the test. The electrical activity of the brain is then recorded for a period of time, typically 20 to 40 minutes.

Risks and Complications

EEGs are generally safe and do not cause any discomfort. However, in rare cases, the procedure may cause minor skin irritation or an allergic reaction to the adhesive used to attach the electrodes.

See Also

• Neurology
• Brain
• Diagnostic tests

Electroencephalograph Resources
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