| Phenotype details |
walking without support-24m; seizure; walk-2y; severe intellectual disability; no speech; microcephaly (−2.5 SD); 2y-absence seizure ; seizure therapy responsive; regression motor and verbal skills; ataxia; intention tremor; no dysmorphic features; wheelchair-bound; MRI brain small vermis; EEG abnormal background activity (1 year), slow abnormal sleep features with paucity of sleep spindles (13 years) |