| Phenotype details |
see paper; ..., 4y-walk, 4y-gait ataxia; early childhood wheelchair used; saccadic pursuit, oculomotor apraxia; attention deficit hyperactivity disorder, verbal IQ79, performance IQ45; epilepsy, staring spells, atonic spells, tonic-clonic seizures on awakening; no blindness; no dysmorphic features; MRI brain atrophy of cerebellar vermis; nerve conduction studies normal, except low sural SNAP for age, EMG mild neurogenic findings |