International League Against Epilepsy Revised Classification of Epileptic Seizures (1981)

1. Partial (focal, local) seizures:

   1. Simple - motor, somatosensory, autonomic, psychic
   2. Complex
      1. Impaired consciousness at outset
      2. Simple partial followed by impaired consciousness
   3. Partial seizures evolving to generalized tonic-clonic (GTC)
      1. Simple to GTC
      2. Complex to GTC
2. Generalized seizures (convulsive or non-convulsive)

   1. 1. Absence seizures
      2. Atypical absences
   2. Myoclonic
   3. Clonic
   4. Tonic
   5. Tonic-clonic
   6. Atonic
   7. Combinations
3. Unclassified epileptic seizures