Intermediate
Technical
In the Industry Vocabulary Test
electroencephalogram
Pronunciation: ih-lek-troh-en-SEF-uh-loh-gram
A diagnostic test that records electrical activity in the brain using electrodes placed on the scalp.
Full Definition
An electroencephalogram (EEG) is a non-invasive neurodiagnostic procedure that measures and records the electrical activity of the brain through electrodes attached to the scalp. The test produces wave patterns that neurologists interpret to diagnose conditions such as epilepsy, sleep disorders, brain tumors, and other neurological abnormalities. EEG recordings can be performed during routine activities, sleep, or with provocative stimuli to elicit abnormal brain activity.
Usage
Usage note: Often abbreviated as EEG in clinical documentation.
In Context
- "The patient's electroencephalogram revealed spike-and-wave complexes characteristic of absence seizures." — Neurology consultation report
- "A 24-hour ambulatory electroencephalogram was ordered to capture intermittent seizure activity." — Diagnostic test order
Also known as
EEG
Don't confuse with
electromyogram
electrocardiogram