Neuropsychological correlates of electroencephalograms in children with epilepsy
Jennifer I Koop1, Philip S Fastenau, David W Dunn
1Department of Psychology, Purdue School of Science, Indiana University Purdue University Indianapolis (IUPUI), Indianapolis, IN, USA. jkoop@neuroscience.mcw.edu
Insights
Children with chronic epilepsy showing slow-wave activity on electroencephalogram (EEG) may experience memory deficits. This suggests closer monitoring of cognitive function in these pediatric patients is necessary.
Area of Science:
- Pediatric Neurology
- Neuropsychology
- Epilepsy Research
Background:
- Epilepsy in children can impact cognitive development.
- Routine clinical electroencephalogram (EEG) is a common diagnostic tool.
- The relationship between EEG findings and neuropsychological deficits needs further investigation in pediatric populations.
Purpose of the Study:
- To investigate the association between neurophysiological activity on EEG and neuropsychological deficiencies in children with epilepsy.
- To differentiate findings between recent-onset and chronic epilepsy groups.
Main Methods:
- Ninety-five children with epilepsy (58 chronic, 37 recent-onset) underwent a neuropsychological assessment.
- Neurophysiological data were obtained from the most recent EEG recordings.
- Statistical analyses explored correlations between EEG variables and neuropsychological scores.
Main Results:
- No significant associations were found between EEG variables and neuropsychological scores in the recent-onset epilepsy group.
- In the chronic epilepsy group, the presence of slow-wave activity on EEG was significantly related to memory impairment (p < 0.01).
- Post-hoc analyses suggested a potential link between the localization of epileptiform activity (EA) and verbal learning deficits.
Conclusions:
- Children with slow-wave activity on EEG may be at higher risk for developing neuropsychological deficits, particularly memory impairment.
- Findings suggest that neurophysiological abnormalities might have a cumulative effect on cognitive development in pediatric epilepsy.
- Results highlight the need for closer monitoring of cognitive and academic functioning in children with specific EEG abnormalities and caution against generalizing findings from adult studies to pediatric epilepsy.
Introduction:
This study examined the degree to which neurophysiological activity on routine clinical EEG is associated with neuropsychological deficiencies in children with epilepsy.
Methods:
Ninety-five children with epilepsy (58 chronic, 37 recent-onset; mean age = 10.41 years, S.D. = 2.87 years; mean age at onset = 5.86 years, S.D. = 3.46 years) completed a neuropsychological battery. Neurophysiological data were collected from the most recent EEG.
Results:
In the recent-onset sample, no neuropsychological scores were related to any EEG variable. In the chronic sample, however, presence of slow-wave activity was related to memory impairment (p < 0.01). Post-hoc analyses on other neuropsychological measures showed localization of epileptiform activity (EA) might be related to verbal learning.
Discussion:
Children with slow-wave activity on EEG might be at increased risk for developing neuropsychological deficits. When these abnormalities are observed on a child's EEG, closer monitoring of cognitive and academic functioning seems warranted. Differences between these findings and past research suggest that conclusions drawn from adult surgical studies cannot be generalized to pediatric patients, especially recent-onset samples, without qualification. Differences between the recent-onset and chronic samples in this cross-sectional study raise the possibility that neurophysiological abnormalities have a cumulative effect on cognitive development.
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