Table 2 Characteristics of seizures, EEG pattern and EP study results
Patient | Age at epilepsy onset, y | Seizure type | Seizure frequency | Age at EEG examination, y | Background pattern first EEG/development of background pattern | Focal/multifocal abnormal activity | Epileptiform activity | Age at EP examination, y | BAEP | VEP | SSEP |
|---|---|---|---|---|---|---|---|---|---|---|---|
1 | 2 | Myoclonic | Daily | 2.0-4.2 | M ➔ Mo | Focal | + | 3.1 – 4.2 | N ➔ N | N ➔ N | - |
2 | 11 | Myoclonic; generalized tonic-clonic | Weekly | 0.8-11.7 | N ➔ S | Focal | + (≥ 3.8 yrs) | 0.8 - 9.1 | N ➔ S | N ➔ S | NCR |
3 | 4 | 1. Fever induced generalized tonic-clonic; 2. (>8.5 yrs) generalized tonic-clonic and atypical absence | 1. Sporadic; 2. Weekly | 0.8-8.6 | N ➔ S | Multifocal | + (≥ 2.9 yrs) | 0.8 - 6.9 | N ➔ S | N ➔N | N ➔ M |
4 | 0.3 | Tonic; smacking | Daily | 0.0-1.3 | N ➔ S | Multifocal | + (≥ 0.5 yrs | 0 - 0.3 | N ➔ S | N ➔N | - |
5 | 3 | Myoclonic; gelastic; atypical absence | Daily | 0.9-4.5 | M ➔ Mo | Focal ➔ multifocal | + (≥ 0.9 yrs) | 1.3 - 4.5 | N ➔ M | N ➔ M | NCR/S |
6 | 2 | Myoclonic; status epilepticus | Daily (clustered) | 0.2-2.4 | N ➔ S | Focal ➔ multifocal | + (≥ 1.1 yrs) St epilepticus | 0.2 - 2.3 | N ➔ N | N ➔ N | NCR |
7 | 2 | Myoclonic-tonic; gelastic | Daily | 0.0-4.0 | N ➔ M | + (≥ 2.3 yrs) | 0 -1.8 | N | N ➔ N | N | |
8 | 0.8 | Tonic | Fever induced | 0.0-2.2 | N | 0 | N | M | - | ||
9 | 1 | Generalized tonic-clonic | Single, fever induced | 0.7-1.7 | N ➔ M | Multifocal | + (≥1.1 yrs) | 0.5 - 1.7 | N ➔ N | N ➔N | - |
10 | 5 | 1. Facial myoclonic; 2. tonic | 1. Daily; 2. Monthly | 5.6 | N | Focal | + | - | - | - | - |
11 | 0.3 | M | + | 0.3 | N | N | M | ||||
12 | 10 | Myoclonic | Daily | 26.7 | M | Focal | + | - | - | - | - |
13 | 5.4-7.3 | N ➔ N | Focal | + (≥ 5.4 yrs) | 5.4 - 7.3 | N ➔ N | N ➔ N | N ➔ N | |||
14 | 7 | Atypical absences | Weekly | 6.5-8.3 | M | + (≥ 6.5 yrs) | 6.5 - 7.5 | N ➔ N | M ➔ N | N ➔ N | |
15 | 21 | Generalized tonic-clonic | Single | 9.3-23.1 | M | Focal➔ multifocal | + (21 yrs) | 9.3 - 23.1 | N ➔ N | N ➔ M | N |
16 | 20 | Atypical absence | Monthly | 13.3-29.5 | Mo ➔ Mo | Multifocal | + (≥ 13.3 yrs) | 10 - 17 | N | N ➔ N | - |