Proposed classification of infantile seizures (2 to 24 months)

Astatic

Sudden loss of muscle tone that may be focal (eg, head nod), hemibody or generalized (eg, fall or drop attack)

Behavioral

Abrupt change in behavior without other overt features (usually becomes quiet-hypomotor), occasionally autonomic signs (pallor, cyanosis, etc.)

Clonic

Clonic jerking, usually of extremities or eyelids, occasionally followed by tonic posturing.

Infantile spasms

May be myoclonic or brief tonic flexor (adduction of arms with forward flexion of head and trunk) or extensor (abduction of arms with backward extension of head and trunk) spasms. These often occur in clusters.

Tonic

Symmetric or asymmetric posturing (occasional "fencer posture"), may be followed by focal or generalized clonic activity.

Versive

A forced and sustained tonic deviation of the eyes that is usually associated with ipsilateral turning of the head and rotation of the trunk.

Unclassified

Class_infantile_seizures.htm

Adapted from: Nordli DR Jr, Bazil CW, Scheuer ML, Pedley TA. Recognition and classification of seizures in infants. Epilepsia 1997; 38:553.
With additional information from:

Acharya JN, Wyllie E, Lüders HO. Seizure symptomatology in infants with localization-related epilepsy. Neurology 1997; 48:189.

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Proposed classification of infantile seizures (2 to 24 months)