Brusse et al. [13] studied the prevalence of fatigue in a sample of 123 patients with various forms of SCA, including, SCA1, SCA2, SCA3, SCA6, SCA7, SCA13, SCA14, SCA17 and individuals with autosomal dominant cerebellar ataxia without identified gene mutation (ADCA). This evidence concerns the gene ATXN3 and autosomal dominant cerebellar ataxia.