Revised terminology and concepts for organization of seizures and epilepsies: Report of the ILAE Commission on Classification and Terminology, 2005-2009

Anne T. Berg, Samuel F. Berkovic, Martin J. Brodie, Jeffrey Buchhalter, J. Helen Cross, Walter Van Emde Boas, Jerome Engel, Jacqueline French, Tracy A. Glauser, Gary W. Mathern, Solomon L. Moshé, Douglas Nordli, Perrine Plouin, Ingrid E. Scheffer

Research output: Contribution to journalArticle

2668 Scopus citations

Abstract

The International League Against Epilepsy (ILAE) Commission on Classification and Terminology has revised concepts, terminology, and approaches for classifying seizures and forms of epilepsy. Generalized and focal are redefined for seizures as occurring in and rapidly engaging bilaterally distributed networks (generalized) and within networks limited to one hemisphere and either discretely localized or more widely distributed (focal). Classification of generalized seizures is simplified. No natural classification for focal seizures exists; focal seizures should be described according to their manifestations (e.g., dyscognitive, focal motor). The concepts of generalized and focal do not apply to electroclinical syndromes. Genetic, structural-metabolic, and unknown represent modified concepts to replace idiopathic, symptomatic, and cryptogenic. Not all epilepsies are recognized as electroclinical syndromes. Organization of forms of epilepsy is first by specificity: electroclinical syndromes, nonsyndromic epilepsies with structural-metabolic causes, and epilepsies of unknown cause. Further organization within these divisions can be accomplished in a flexible manner depending on purpose. Natural classes (e.g., specific underlying cause, age at onset, associated seizure type), or pragmatic groupings (e.g., epileptic encephalopathies, self-limited electroclinical syndromes) may serve as the basis for organizing knowledge about recognized forms of epilepsy and facilitate identification of new forms.

Original languageEnglish (US)
Pages (from-to)676-685
Number of pages10
JournalEpilepsia
Volume51
Issue number4
DOIs
StatePublished - Apr 1 2010

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Keywords

  • Classification
  • Epilepsy
  • Organization
  • Seizure
  • Syndrome

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology

Cite this

Berg, A. T., Berkovic, S. F., Brodie, M. J., Buchhalter, J., Cross, J. H., Van Emde Boas, W., Engel, J., French, J., Glauser, T. A., Mathern, G. W., Moshé, S. L., Nordli, D., Plouin, P., & Scheffer, I. E. (2010). Revised terminology and concepts for organization of seizures and epilepsies: Report of the ILAE Commission on Classification and Terminology, 2005-2009. Epilepsia, 51(4), 676-685. https://doi.org/10.1111/j.1528-1167.2010.02522.x