Among autosomal recessive dystonia, one can distinguish dystonia-parkinsonism syndromes, such as DYT-PRKRA, dopa-responsive dystonia, such as DYT/PARK-TH, dystonia associated with neurodegeneration, and brain iron accumulation (NBIA/DYT-PANK2, NBIA/DYT/PARK-PLA2G6; aceruloplasminemia, fatty acid hydroxylase-associated neurodegeneration). This evidence concerns the gene TH and Dystonia.