Seizure Classification- International System

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Seizure Classification System- International

1. Partial Seizures  (usually 1 hemisphere at onset)

  • Simple  (consciousness not impaired)
  • With Motor Symptoms  (Jacksonian, adversive)
  • With somatosensory  or other special sensory symptoms
  • With autonomic symptoms
  • With psychic symptoms
  • Complex (impaired consciousness)
  • Simple partial onset followed by impaired consciousness
  • Impaired consciousness at onset
  • Secondarily generalized
  • Simple partial seizures evolving to generalized tonic-clonic seizures
  •  Simple partial seizures evolving to complex partial seizures then to generalized tonic-clonic seizures

2. Generalized Seizures  (involve both hemispheres of the brain from the onset, consciousness is usually impaired)

  • Absence
  • Typical
  • Atypical
  • Myoclonic
  • Clonic
  • Tonic
  • Tonic-clonic
  • Atonic

3. Localization-related (Focal Seizures)

  • Idiopathic
  • Benign focal epilepsy of childhood
  • Symptomatic
  • Chronic progressive epilepsia partialis continua
  • Temporal lobe epilepsy
  • Extratemporal

4. Generalized Epilepsy

  • Idiopathic
  • Benign neonatal convulsions
  • Childhood absence
  • Juvenile myoclonic
  • Other
  • Cryptogenic or symptomatic
  • West Syndrome (infantile spasms)
  • Early myoclonic encephalopathy
  • Lennox-Gastaut syndrome
  • Progressive myoclonic epilepsy

5. Special Syndromes

  • Febrile seizures

6. Unclassified

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