“…Differentiation between dystonia and spasticity can be difficult, as they are often comorbid phenotypes. 3 Dystonia's GTP cyclohydrolase deficiency [6][7][8] x Brisk reflexes, clonus, dystonia classically begins in the feet TH deficiency 6,9 x x Infantile-onset: rigidity, parkinsonism, oculogyric crises, ptosis, spasticity, autonomic instability, alternating lethargy/ irritability Childhood-onset: similar to GTP cyclohydrolase deficiency; prone to L-DOPAinduced dyskinesias Sepiapterin reductase deficiency 6,10 x x Oculogyric crises, spasticity, autonomic instability, diurnal fluctuation…”