The International League Against Epilepsy (ILAE) 2017 classification of seizure types is introduced to provid guidance on how to employ the classification. The main framework includes basic and extended versions of the classification. Key signs and symptoms of seizures are used as basis for categories of seizures that are focal or generalized from onset or with unknown onset. Any focal seizure optionally characterized by whether awareness is retained or impaired is further divided into a focal awareness seizure and focal impaired awareness seizure. Focal seizures can become bilateral tonic-clonic. Generalized seizures comprise the onset of motor and nonmotor (absence) seizures. Seizures of unknown onset may be classified as motor, nonmotor, tonic-clonic, epileptic spasms, or behavior arrest.

Epilepsy; Classification; Seizures; Focal; Generalized