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Frontal absences in children
Insights
Frontal onset absence seizures in children are clinically similar to primary generalized absence seizures but present unique challenges. These seizures are harder to control and linked to increased learning and behavioral issues.
Area of Science:
- Pediatric Neurology
- Epileptology
- Clinical Neurophysiology
Background:
- Absence seizures are a common epilepsy syndrome in children.
- Distinguishing between primary generalized and focal onset absence seizures is crucial for effective management.
- Frontal lobe epilepsy can present with generalized EEG patterns.
Purpose of the Study:
- To analyze the clinical and electroencephalogram (EEG) characteristics of absence seizures with a frontal onset.
- To compare frontal onset absence seizures with primary generalized absence seizures.
- To investigate the implications of frontal onset for epilepsy syndrome classification.
Main Methods:
- Retrospective analysis of 23 children with absence seizures and generalized spike-wave patterns on long-term video EEG monitoring.
- Classification into frontal onset (n=10) and primary generalized (n=13) groups.
- Clinical assessment of seizure control, learning, and behavioral problems.
Main Results:
- Frontal onset absence seizures showed similar clinical presentation to primary generalized absences.
- Frontal onset absences were significantly more difficult to control.
- Children with frontal onset absences had a higher incidence of learning and behavioral problems.
- Interictal epileptic discharges were observed in 80% of frontal onset cases.
Conclusions:
- Frontal onset absence seizures represent a distinct clinical entity.
- These seizures are associated with treatment resistance and significant neurodevelopmental comorbidities.
- Frontal onset absences should be considered a secondarily generalized epilepsy syndrome originating from frontal regions.
Abstract:
In a cohort of 59 consecutive children referred for staring spells, we analysed clinical and electroencephalogram (EEG) characteristics in 23 children with both a history of absence seizures and a generalized spike and wave pattern during long-term video EEG monitoring. In 10 children, a frontal spike preceded the generalized spike and wave pattern. In the remaining 13 children, primary generalized spikes and waves were found. The frontal onset absences were clinically not different from primary generalized absences. The most striking difference between the two groups was the difficulty in controlling the absences in the frontal onset group and the high incidence of learning and behavioural problems in that group. The EEG analysis showed interictal, isolated epileptic discharges in 80% of the children with frontal onset absences. We believe that frontal onset absences should be considered as a secondarily generalized epilepsy syndrome, originating in the frontal regions.