Cognitive development from two to ten years after pediatric epilepsy surgery

Area of Science:

• Pediatric Neurology
• Neurosurgery
• Cognitive Neuroscience

Background:

• Epilepsy surgery is a treatment option for drug-resistant epilepsy in children.
• Long-term effects of epilepsy surgery on cognitive functions and seizure control require further investigation.

Purpose of the Study:

• To prospectively investigate cognitive development and sustained seizure control 2–10 years post-epilepsy surgery in pediatric patients.
• To assess changes in intelligence quotient, memory, attention, and executive functions.
• To evaluate the long-term efficacy of epilepsy surgery in maintaining seizure reduction.

Main Methods:

• Prospective study of 17 children and adolescents undergoing epilepsy surgery.
• Assessment of cognitive functions including intelligence quotient, verbal and figurative memory, working memory, attention, reaction times, and executive functions.
• Long-term follow-up of seizure control up to 10 years post-surgery.

Main Results:

• Intelligence quotient remained stable; learning capacity and working memory improved.
• Verbal memory showed mixed results (improvement in 50%, decline in 50%); figurative memory declined in most.
• Attention improved in sustained attention and impulse control, but auditory attention span shortened and reaction times increased.
• Six subjects (35%) were seizure-free at 10 years; 13 (76%) achieved >75% seizure reduction.
• Seizure control improved in 5 subjects, while 2 experienced seizure recurrence between 2 and 10 years.

Conclusions:

• Epilepsy surgery in children can lead to sustained seizure control and cognitive improvements, particularly in learning and working memory, up to 10 years post-operation.
• While some memory functions may decline, overall cognitive stability is maintained.
• Long-term seizure freedom and significant reduction are achievable, highlighting the surgery's enduring benefits.