Electroencephalography
Pronunciation: ih-LEK-tro-en-SEF-ah-LOG-rah-fee
Also written as: EEG — Electroencephalography
Non-invasive recording of electrical activity in the brain using electrodes placed on the scalp.
Full Definition
Electroencephalography (EEG) is a neurophysiological monitoring method that records electrical activity of the brain by measuring voltage fluctuations resulting from ionic current within neurons. Electrodes are placed on the scalp according to standardized positioning systems, most commonly the 10-20 system. EEG is essential in neuromodulation for identifying abnormal brain wave patterns, monitoring treatment effects, and guiding electrode placement in procedures like deep brain stimulation. The technique provides real-time information about brain function and is crucial for diagnosing epilepsy, sleep disorders, and other neurological conditions.
Usage
Usage note: Distinguish between the procedure (electroencephalography) and the recording (electroencephalogram).
In Context
- "Electroencephalography revealed abnormal spike-and-wave patterns consistent with generalized epilepsy." — Diagnostic report
- "Pre-operative electroencephalography mapping guided the placement of cortical stimulation electrodes." — Surgical planning document