| Phenotype details |
normal initial cognitive development; normal initial motor development; 9m-increased OFC; never walked; 4y-start motor decline; 6y-full wheelchair dependency; 4y-start cognitive decline; rage; no history psychiatric diagnoses; 4y-refractory generalized seizures; no status epilepticus; OFC >+2SD; clumsiness; spasticity of arms; spasticity of legs; no gait/truncal ataxia; no appendicular ataxia; no dystonia; no rigidity; dysarthria; no dysphagia; severe cognitive deficit |