Furthermore, they described SCA3 probands with 22 ATXN2 repeats as having no or mild facial fasciculations and no other associations between repeat length and the severity of neurologic findings, such as gait and limb ataxia, pyramidal findings, dysarthria, dysphagia, external ophthalmoplegia, nystagmus, eyelid retraction, dystonia, and optic atrophy [49]. This evidence concerns the gene ATXN2 and Leber hereditary optic neuropathy.