MTHFR and cerebellar ataxia: This panel includes testing for many genetic causes of dystonia, spasticity, and ataxia, as well as by a 256-gene-panel of neurological disorders at InVitae, including glutaric aciduria type 1 (GA1), propionic acidemia, cobalamin-C and methylenetetrahydrofolate reductase (MTHFR) deficiencies, and congenital Parkinsonism.