Chapter

Effects of epileptiform EEG discharges on cognitive function

Albert P. Aldenkamp

in Epilepsy and Memory

Published in print June 2012 | ISBN: 9780199580286
Published online September 2012 | e-ISBN: 9780191739408 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199580286.003.0009
Effects of epileptiform EEG discharges on cognitive function

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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

Chapter.  8259 words. 

Subjects: Neuroscience

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