1964 International League Against Epilepsy (ILAE) classification of seizures

1. Partial seizures

1. With elementary symptomatology
   1. With motor symptoms
      1. focal motor (without march)
      2. jacksonian
      3. adversive
      4. postural
      5. somatic inhibitory
      6. involving speech (including vocalization and arrest of speech)
   2. With special sensory or somatosensory symptoms
      1. somato-sensory
      2. visual
      3. auditory
      4. olfactory
      5. gustatory
      6. vertiginous
   3. With autonomic symptoms
   4. Compound forms
2. With Complex Symptomatology (which may sometimes begin with elementary symptomatology)
   1. With impaired consciousness alone
   2. With intellectual symptomatology
      1. with dysmnesic disturbances (including amnesia, déjà vu, déjà vécu)
      2. with ideational disturbances (including “forced thinking”)
   3. With affective symptomatology
   4. With “psychosensory” symptomatology (illusions, hallucinations)
   5. With “psychomotor” symptomatology (automatisms)
   6. Compound forms
3. Secondarily Generalized (all forms of partial seizures, with elementary or elaborated symptomatology, can develop into generalized seizures, sometimes so rapidly that the focal features may be unobservable. These generalized seizures may be symmetrical or asymmetrical, tonic or clonic, but most often tonic-clonic in type)

2. Generalized seizures

1. Non-convulsive seizures
   1. With impairment of consciousness only
      1. Brief duration (beginning and ending abruptly)
         1. typical “absence”
         2. atypical “absence”
      2. Long duration (‘‘absence status”)
   2. With other phenomena associated with impairment of consciousness (Absences, typical or atypical, and the absence status can occur):
      1. with mild clonic components (myoclonic absences)
      2. with increase of postural tone, symmetrical or asymmetrical (absences with retropulsion or gyration)
      3. with diminution or ablution of postural tone (“drop attacks” or atonic seizures of longer duration)
      4. with automatisms
      5. with autonomic phenomena (some forms of abdominal seizures, absences associated with sphincter incontinence, etc.)
      6. as mixed forms
2. Convulsive seizures
   1. Myoclonic jerks
      1. generalized（including the shortest “infantile spasms”)
      2. fragmentary
   2. Clonic seizures
   3. Tonic seizures (including the longest "infantile spasms")
   4. Tonic-clonic seizures

3. Unilateral or predominantly unilateral seizures in children (Characterised by clonic, tonic or tonic-clonic convulsions, with or without an impairment of consciousness, expressed only or predominantly in one side. Such seizures sometimes shift from one side to the other but usually do not become symmetrical)

4. Erratic seizures in new-born (With variable tonic and/or clonic convulsions, generally unilateral, sometimes alternating or generalized)

5. Unclassified epileptic seizures (Includes all seizures which cannot be classified because of inadequate or incomplete data)

References:

1、Arnautova, E.N. and T.N. Nesmeianova, A Proposed International Classification of Epileptic Seizures.Epilepsia, 1964. 5: p. 297-306.