electroencephalogram
Pronunciation: ih-lek-troh-en-SEF-uh-loh-gram
Also written as: EEG — electroencephalogram
A diagnostic test that measures electrical activity in the brain using electrodes placed on the scalp.
Full Definition
An electroencephalogram (EEG) is a non-invasive neurophysiological test that records the electrical activity of the brain through electrodes placed on the scalp. EEGs are essential diagnostic tools in neuropsychiatry for detecting seizure disorders, evaluating brain function, assessing sleep disorders, and monitoring treatment responses. The test produces wave patterns that reflect different states of brain activity and can reveal abnormalities indicative of various neurological and psychiatric conditions.
Usage
Usage note: Commonly abbreviated as EEG; distinguish from ECG/EKG (electrocardiogram).
In Context
- "The electroencephalogram revealed spike-and-wave patterns consistent with absence seizures." — Diagnostic report
- "Sleep study protocols typically include continuous electroencephalogram monitoring throughout the night." — Sleep laboratory procedure