Book chapter
Non-epileptiform abnormalities
Making Sense of the Pediatric EEG, pp.189-226
CRC Press
2024
DOI: 10.1201/b23339-8
Abstract
Non-epileptiform abnormalities are associated with transitory or permanent dysfunction but not with an increased risk of seizures. There are several types of non-epileptiform abnormalities: slowing, asymmetry, asynchrony, absence of physiological sleep elements, periodic discharges, and excessive beta. As opposed to what is seen in adult electroencephalogram (EEG) recordings, slow waves in childhood can be normal on several occasions. Although theta and delta waves are normal in the awake EEG recording of very young children, diffuse, very frequent, or continuous theta and delta waves should be considered abnormal in older children. Diffuse background slowing is associated with diffuse subcortical dysfunction. During coma, the EEG is characterized by diffuse slowing, with a good correlation between wave frequency and severity of symptoms. Sleep transients may also be absent. The unilateral absence of posterior dominant rhythm reactivity to eye-opening and closure is associated with ipsilateral structural lesion in the posterior region.
Details
- Title: Subtitle
- Non-epileptiform abnormalities
- Creators
- Brittany SpriggMaria Augusta Montenegro
- Contributors
- Maria Augusta Montenegro (Editor)
- Resource Type
- Book chapter
- Publication Details
- Making Sense of the Pediatric EEG, pp.189-226
- Publisher
- CRC Press; Boca Raton, FL
- DOI
- 10.1201/b23339-8
- Number of pages
- 38
- Alternative title
- Non-epileptiform abnormalities
- Language
- English
- Date published
- 2024
- Academic Unit
- Stead Family Department of Pediatrics; Neurology (Pediatrics)
- Record Identifier
- 9984701648202771
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