Focal seizures can arise from coordinated activity across large-scale epileptic networks and propagate to regions that are not functionally altered but are recruited by epileptiform discharges.

Focal seizure may evolve to bilateral tonic-clonic (previously called secondary-generalized). Atonic, clonic, tonic, myoclonic seizures and epileptic spasms can be either of focal or generalized onset. Unclassified type of seizure was introduced. New types of seizures (absence with eyelid myoclonia, myoclonic absence, myoclonic atonic and clonic-tonic-clonic seizures) were added ¹⁾.

see Focal epilepsy.