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Chapter 20 - Epilepsies

from Part III - Specific Conditions

Published online by Cambridge University Press:  24 June 2021

Neville M. Jadeja
Neville M. Jadeja
Affiliation:
University of Massachusetts Medical School
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Summary

Epilepsy is a disorder of recurrent unprovoked (or reflex) seizures; the key to diagnosing epilepsy is estimating the risk of recurrence. Epilepsy may be diagnosed if a patient has two or more seizures at least 24 hours apart, a first-time seizure with factors that increase the risk of recurrence, or an epilepsy syndrome. When determining the type of epilepsy, first identify the seizure type(s), then the corresponding epilepsy type. Consider if the epilepsy is potentially syndromic or nonsyndromic. Consider the underlying etiology (structural, genetic, infectious, immune, or metabolic). Focal epilepsies may be classified based on their region of onset, that is, frontal, temporal (mesial/lateral), parietal, occipital, or insular. Ictal and interictal EEG findings vary with the type of focal epilepsy.

Keywords

epilepsystructuralgeneticinfectiousimmunemetabolic
Type
Chapter
Information
How to Read an EEG , pp. 187 - 194
Publisher: Cambridge University Press
Print publication year: 2021

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References

Fisher, RS, Acevedo, C, Arzimanoglou, A, et al. ILAE official report: a practical clinical definition of epilepsy. Epilepsia. 2014 Apr;55(4):475–82.CrossRefGoogle ScholarPubMed
Krumholz, A, Wiebe, S, Gronseth, GS, et al. Evidence-based guideline: management of an unprovoked first seizure in adults: report of the Guideline Development Subcommittee of the American Academy of Neurology and the American Epilepsy Society: evidence-based guideline. Epilepsy Currents. 2015 May;15(3):144–52.Google Scholar
Fisher, RS, Cross, JH, D’souza, C, et al. Instruction manual for the ILAE 2017 operational classification of seizure types. Epilepsia. 2017 Apr;58(4):531–42.CrossRefGoogle ScholarPubMed
McGonigal, A, Chauvel, P. Frontal lobe epilepsy: seizure semiology and presurgical evaluation. Practical Neurology. 2004 Oct 1;4(5):260–73.Google Scholar
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Siegel, AM, Williamson, PD. Parietal lobe epilepsy. Advances in Neurology. 2000;84:189–99.Google Scholar
Williamson, PD, Thadani, VM, Darcey, TM, et al. Occipital lobe epilepsy: clinical characteristics, seizure spread patterns, and results of surgery. Annals of Neurology. 1992 Jan;31(1):3–13.CrossRefGoogle ScholarPubMed
Obaid, S, Zerouali, Y, Nguyen, DK. Insular epilepsy: semiology and noninvasive investigations. Journal of Clinical Neurophysiology. 2017 Jul 1;34(4):315–23.CrossRefGoogle ScholarPubMed

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  • Epilepsies
  • Neville M. Jadeja
  • Book: How to Read an EEG
  • Online publication: 24 June 2021
  • Chapter DOI: https://doi.org/10.1017/9781108918923.022
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Save book to Dropbox

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  • Epilepsies
  • Neville M. Jadeja
  • Book: How to Read an EEG
  • Online publication: 24 June 2021
  • Chapter DOI: https://doi.org/10.1017/9781108918923.022
Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Epilepsies
  • Neville M. Jadeja
  • Book: How to Read an EEG
  • Online publication: 24 June 2021
  • Chapter DOI: https://doi.org/10.1017/9781108918923.022
Available formats
×