electroencephalogram
Americannoun
noun
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A graphic record of brain waves representing electrical activity in the brain, used especially in the diagnosis of seizures and other neurological disorders.
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◆ The instrument used to record an electroencephalogram is called an electroencephalograph. It generates a record of the electrical activity of the brain by measuring electric signals using a set of electrodes attached to the scalp that act as transducers. Differences of electric potential between different parts of the brain are measured by a portable set of galvanometers and printed as a wide paper strip with multiple simultaneous waveform tracings that have standard configurations in the normal brain.
Etymology
Origin of electroencephalogram
First recorded in 1930–35; electro- + encephalogram
Vocabulary lists containing electroencephalogram
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
To measure my brain waves, I wore a high-density electroencephalogram headcap with 128 channels.
From The Wall Street Journal ● Jun. 27, 2026
So she took inspiration from researchers who study language processing in humans and got her hands on an electroencephalogram machine.
From Los Angeles Times ● Mar. 22, 2024
Sleep was assessed using electroencephalogram recordings and visual observations.
From Science Daily ● Mar. 13, 2024
The researchers used an EEG, or electroencephalogram, a device that records the electrical activity of the brain using small, metal discs called electrodes that are affixed to the scalp.
From Salon ● May 3, 2023
His electroencephalogram revealed nine alpha cycles to the second, but too much theta.
From The Dictator by Stephen Marlowe
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