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Table 1 EEG’s abnormalities classification

From: Electro-clinical and neurodevelopmental outcome in six children with early diagnosis of tuberous sclerosis complex and role of the genetic background

Distribution of IEA

Intensity of IEA

A One region (one focus)

1 Irregular spikes or sharp waves

B One hemisphere (>  1 focus)

2 Irregular spike and wave complexes

C Multifocal (at least 2 foci, each in a different hemisphere)

3 Continuous spike and waves complexes

D Generalized

4 Hypsarrhythmia