encephalogram
Definition
- Noun:
- An X-ray image of the brain: This is created by replacing some of the cerebrospinal fluid with a gas (like oxygen) to enhance the contrast between different brain structures, making them more visible on the X-ray.
- A graphical record of the brain's electrical activity: This is a chart or tracing produced by an electroencephalograph (EEG) machine, representing the electrical waves generated by brain cells.
Usage Examples
- Noun:
- The doctor ordered an encephalogram to look for any structural abnormalities.
- The sleep study included recording an encephalogram to monitor brain wave patterns.
Advanced Usage
- "Pneumoencephalogram": A specific, now largely historical, type of encephalogram involving the injection of air or gas. This term is more precise for the first definition.
- Before modern CT scans, a pneumoencephalogram was a common but uncomfortable diagnostic procedure.
Variants and Related Words
- Electroencephalogram (EEG): The full technical term for the graphical record of brain electrical activity. This is the more common and specific term for the second definition.
- The neurologist analyzed the patient's electroencephalogram for signs of seizure activity.
- Electroencephalograph: The machine that records the encephalogram (EEG).
- Encephalography: The process or technique of recording encephalograms.
Synonyms
- Brain scan: A broader term that can include encephalograms and other imaging techniques like MRI or CT.
- EEG: The standard abbreviation for an electroencephalogram.
- Brain wave recording: A descriptive synonym for the graphical record.
Related Phrases
- To have an EEG done: A common phrase describing the procedure of getting an electroencephalogram recorded.
- The patient had to have an EEG done to diagnose the cause of the fainting spells.
Noun
-
an X ray of the brain made by replacing spinal fluid with a gas (usually oxygen) to improve contrast
-
a graphical record of electrical activity of the brain; produced by an electroencephalograph
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