Patient characteristics
| Patient | Age (y) | Origin | Sex | Age HC SD | Most advanced milestone | No of unaffected sibs | Visual pursuit | Behavioural features | Seizures | Chorea |
|---|---|---|---|---|---|---|---|---|---|---|
| *Sisters. GTC, generalised tonic-clonic. | ||||||||||
| 1 | 4 | Iraq/Morocco | F | 26M 45.2 2 | Smile | 2 | No | Irritability | No | No |
| 2 | 6 | Iraq | F | 4.5Y 44.5 4 | Smile | 2 | Yes | Irritability, laughing episodes | No | Yes |
| 3 | 2.5 | Morocco/Iraq | M | 15M 44 -2 | None | 2 | Partial | Irritability, laughing episodes | Partial, myoclonic, GTC, tonic | Yes |
| 4 | 9 | Morocco | F | 4Y 46 -3 | Smile | 2 | Yes | Irritability | Tonic, myoclonic, GTC | Yes |
| 5* | 4.5 | Morocco | F | 2Y 44 -3 | Smile | 2 | Yes | Irritability | GTC, myoclonic, tonic | No |
| 6* | 19 | Morocco | F | 17Y 51 -2.5 | None | 2 | No | GTC, myoclonic | No | |
| 7 | 7.5 | Iraq | M | 5Y 46 -4 | None | 3 | Nystagmus | Irritability | GTC, myoclonic, tonic | No |