Describing EEG Terminology
Let's see how good you are with your EEG terminology!
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- Activity (typically abnormal complexes) occurring at regular intervals.
- Activity that occurs once every 10 seconds or more on an EEG recording.
- An isolated wave or pattern that is distinctively different from background activity.
- One area is firing with rapid spread to another region.
- Type of slowing seen more frequently with focal lesions.
- 50 – 99% of EEG recording is suppression or attenuation of all activity.
- Waveform with a pointed peak and duration of 20 – 70 milliseconds.
- Waveforms that should be rhythmic are not rhythmic.
- Reduction in amplitude
- Activity resembling sine waves. Most common example is background alpha.
- EEG activity composed of multiple frequencies that combine to form a complex waveform.
- Activity occurring in a small area, usually 1-2 electrodes
- A widespread abnormality.
- Activity that occurs only on one side of the brain.
- Type of slowing seen more frequently with diffuse cerebral dysfunction.
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