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Five epilepsy electroencephalography (EEG) patterns

Pattern	Epilepsy group	EEG background	Interictal epileptiform discharges
1	Familial epilepsies	Normal	None
2	Genetic generalized epilepsies	Normal	Stereotyped generalized
3	Self-limited epilepsies	Normal	Stereotyped focal or multifocal
4a (b)*	Epileptogenic encephalopathies	Diffusely slowed (with decrements)	Pleomorphic multifocal and diffuse
5a (b)*	Focal structural epilepsies	Focal slowing (with decrements)	Pleomorphic focal

A combination of two interictal EEG domains was used: organization of the background activity and a morphology/topography of epileptiform discharges.

* Patterns 4 and 5 are subcategorized as 4b and 5b if electrodecrements are present.

From: Kim SH, Korff CM, Kim AJ, Nordli DR Jr. A practical, simple, and useful method of categorizing interictal EEG features in children. Neurology 2015; 85:471. DOI: 10.1212/WNL.0000000000001805. Copyright © 2015 American Academy of Neurology. Reproduced with permission from Wolters Kluwer Health. Unauthorized reproduction of this material is prohibited.

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