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Verbal Memory and IQ in Children who Undergo Focal Resection for Intractable Epilepsy:A Clinical Review

Published online by Cambridge University Press:  21 February 2012

Suncica Sunny Lah*
Affiliation:
Sydney Children's Hospital and Macquarie University, Australia. sunnyl@psych.usyd.edu.au
Pamela Joy
Affiliation:
The Children's Hospital at Westmead, Australia.
Kathleen Bakker
Affiliation:
The Children's Hospital at Westmead, Australia.
Laurie Miller
Affiliation:
Royal Prince Alfred Hospital, Sydney, Australia.
*
*Address for correspondence: Suncica Sunny Lah, School of Psychology, Transient Building (F12), University of Sydney NSW 2006, Australia.
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Abstract

Previous studies have indicated an increased likelihood of intellectual and memory impairments in children with epilepsy. It has been argued that early surgical intervention in children with intractable seizures might be advantageous to their development. We conducted a retrospective review of pre- and postoperative IQ and verbal memory scores in 16 paediatric patients who underwent temporal (N = 10) or extra-temporal (N = 6) focal surgery for epilepsy. Patients with an extratemporal seizure focus performed significantly worse than patients with a temporal lobe seizure focus on Full Scale IQ and Verbal IQ before surgery. Postoperatively a statistically significant decline in verbal memory, but not in any of the IQ indices was noticed in the extratemporal group. Individual outcome analyses revealed a significant decline in verbal memory in 22% of temporal lobectomy and 60% of extratemporal cases. Our review suggests that verbal memory but not IQ is vulnerable to postoperative decline in children who undergo focal extratemporal surgery for intractable epilepsy. The findings raise the possibility that extratemporal regions play a role in anterograde memory in children. Given the small number of subjects in this study, further investigations into the cognitive effects of paediatric surgical intervention are recommended.

Type
Articles
Copyright
Copyright © Cambridge University Press 2002

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