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Neuropsychology of childhood epilepsy: pre- and postsurgical assessment
M Lassonde1, H C Sauerwein, I Jambaqué
1Département de Psychologie, Université de Montréal, Qué., Canada. Maryse.Lassonde@umontreal.ca
Insights
Childhood epilepsy subtypes have distinct cognitive effects, impacting planning, memory, and behavior. Epilepsy surgery offers significant benefits, with cognitive deficits being infrequent and minor.
Area of Science:
- Neuroscience
- Pediatrics
- Cognitive Psychology
Background:
- Childhood epilepsy is a common, disabling disorder affecting brain maturation.
- Historically, epilepsy was thought to cause non-specific cognitive and behavioral issues.
- Recent research indicates epilepsy subtypes have unique cognitive profiles.
Purpose of the Study:
- To analyze the multifaceted pathology of childhood epilepsy.
- To characterize the neuropsychological profile of focal epilepsies based on lesion site.
- To review neuropsychological techniques for presurgical evaluation and outcomes of epilepsy surgery.
Main Methods:
- Group study of children with frontal lobe epilepsy.
- Analysis of cognitive and behavioral symptoms associated with temporal lobe epilepsy.
- Review of neuropsychological findings related to neurosurgical interventions.
Main Results:
- Frontal lobe epilepsy in children presents with deficits in planning, attention, and motor dexterity, similar to adults.
- Temporal lobe epilepsy in children is associated with memory impairment and academic/behavioral disturbances.
- Epilepsy surgery generally yields significant benefits, with occasional, minor cognitive deficits.
Conclusions:
- Childhood epilepsy is not a single entity; focal epilepsies have specific cognitive consequences.
- Neuropsychological evaluation is crucial for presurgical planning.
- Epilepsy surgery is an effective treatment with a favorable risk-benefit profile regarding cognitive function.
Abstract:
Childhood epilepsy is one of the most prevalent forms of chronic and disabling childhood disorders. Because it disrupts brain maturation, it has long been thought to produce non-specific consequences such as mental deficiency and behavioral problems. However, advances in medical knowledge have shown that childhood epilepsy should not be considered as a single disorder, and it is now becoming apparent that various clinical entities have different cognitive expressions that yet need to be specified. The purpose of this paper is to provide an up-to-date analysis of this multi-faceted pathology. The first section is devoted to the characterization of the neuropsychological profile that accompanies focal epilepsies, as defined by the site of the epileptic process. We report the first group study of children with frontal lobe epilepsy. The results indicate that frontal lobe epilepsy produces symptoms (deficits of planning, attention and motor dexterity) that are akin to those found in frontal-lesioned adults. Similarly, like in adults, temporal lobe epilepsy produces memory impairment in children as well as behavioral and academic disturbances. Occipito-parietal lobe epilepsy is rare in children and its effects still need to be specified. The second section deals with the neuropsychological techniques used in presurgical evaluation. Finally, the various neurosurgical procedures that are increasingly being used as part of the arsenal of epilepsy treatment are described along with the neuropsychological findings that are associated with these interventions. It can be concluded that the beneficial effects of epilepsy surgery (callosotomy, hemispherectomy, temporal and extra-temporal resections) by far outweigh the few cognitive deficits that are occasionally reported following these interventions.