SCA2 is an autosomal‐dominant disorder caused by the expansion of CAG repeats in the N‐terminal coding region of ATXN2. Clinical features of SCA2 are characterized mainly by limb and gait ataxia, dysarthria and abnormal eye movements (Cancel et al., 1997; Geschwind et al., 1997). This evidence concerns the gene ATXN2 and Gait ataxia.