Slowing of saccades, especially on horizontal gaze, is a hallmark clinical feature of spinocerebellar ataxia type 2 (SCA2), first described by Wadia and Swami [11], though slow saccades have also been described in other types, such as SCA1 and SCA7. This evidence concerns the gene ATXN7 and spinocerebellar ataxia type 2.