The DYT1 gene, responsible for the majority of early onset generalized dystonia, was localized to chromosome 9 in 1989 and sequenced 8 years later.66, 67 Since then, over 20 genetically defined dystonia subtypes have been described, and many more inherited degenerative conditions are recognized to possess dystonia as part of their broader phenotype. Here, TOR1A is linked to Dystonia.