The difference between IMCs the γ and β frequency bands (IMCγ-IMCβ) differentiated the SCA subtypes from the neurotypical group better than IMCβγ did, with the best performance in differentiating SCA3 from neurotypical subjects having an area under the ROC curve of 0.85. This evidence concerns the gene ATXN3 and autosomal dominant cerebellar ataxia.