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Epilepsy and Memory$
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Adam Zeman, Narinder Kapur, and Marilyn Jones-Gotman

Print publication date: 2012

Print ISBN-13: 9780199580286

Published to Oxford Scholarship Online: September 2012

DOI: 10.1093/acprof:oso/9780199580286.001.0001

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Effects of epileptiform EEG discharges on cognitive function

Effects of epileptiform EEG discharges on cognitive function

Chapter:
(p.160) Chapter 9 Effects of epileptiform EEG discharges on cognitive function
Source:
Epilepsy and Memory
Author(s):

Albert P. Aldenkamp

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199580286.003.0009

This chapter reviews the evidence on the cognitive impact of interictal epileptiform electroencephalogram (EEG) discharges. Such cognitive impairment has a direct or more remote relation to episodes of epileptiform EEG discharges and must be distinguished from (post-) ictal seizure effects and from the nonperiodic long-term ‘stable’ interictal effects caused by the clinical syndrome or the underlying aetiology. The chapter concludes that while the concept of ‘transient cognitive impairment’ is still valid, refinement of methodology has shown that a large proportion of presumed transient cognitive impairment can be attributed to subtle seizures, while interictal epileptic activity accounts for a much smaller part of the cognitive effects than previously thought. Cryptogenic partial epilepsies are especially associated with the risk of cognitive impairment.

Keywords:   interictal epileptiform electroencephalogram discharges, transient cognitive impairment, seizures, cryptogenic partial epilepsies

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