Generalized seizures are sub-categorized into several major types: generalized tonic clonic; myoclonic; absence; and atonic.

Seizures of with initial involvement of both cerebral hemispheres.

HP:0007339

HP:0002409

HP:0007114

Generalized seizures

Generalized-onset seizures

human_phenotype

HP:0002197

http://purl.obolibrary.org/obo/hp.owl

A generalized seizure is conceptualized as originating at some point within, and rapidly engaging, bilaterally distributed networks. Such bilateral networks can include cortical and subcortical structures, but do not necessarily include the entire cortex. Although individual seizure onsets can appear localized, the location and lateralization are not consistent from one seizure to another.