1 | Normal/mild abnormalities | Normal pattern for GA, including slightly abnormal activity, e.g. mild asymmetries, mild voltage depression |
| | |
2 | Moderate abnormalities | Discontinuous activity with IBI too long for GA. Clear asymmetry or asynchrony. Absence of age appropriate EEG features, e.g. delta brushes |
| | |
3 | Major abnormalities | Severe discontinuity in EEG for GA. Burst suppression pattern. No appropriate wake–sleep cycles for GA. Multi focal sharp waves or positive rolandic sharp waves |
| | |
4 | Inactive EEG | Background activity <10 μV |