It was shown that a mutation in KCND3 was associated with the autosomal dominant inherited neurodegenerative disorder, spinocerebellar ataxia types 19 and 22 (SCA19/22) (Duarri et al., 2012; Lee et al., 2012; Paucar et al., 2018; Hsiao et al., 2019). This evidence concerns the gene KCND3 and spinocerebellar ataxia type 19/22.