TOR1A and hereditary spastic paraplegia: Initially named using chromosomal locus symbols (i.e., DYT1), Marras et al. proposed a new revised system that favors the use of the name of the gene responsible for the disorder, preceded by the prefix indicating the predominantly associated movement disorder (i.e., DYT for dystonia, PARK for parkinsonism, CHOR for chorea, NBIA for neurodegeneration with brain iron accumulation, and HSP for hereditary spastic paraplegia) [20].