Psychiatric presentations and initial presenting complaints of spinocerebellar ataxia type 12 (SCA12). (A) More than 1 psychiatric symptom can coexist. (B) Initial presenting complaints of SCA12 include (a) tremor (90%) and other symptoms (dystonia, 5%; gait ataxia, 5%) and (b) tremor at presentation according to anatomic distribution. RUL indicates right upper limb; UL, lower limb, LL, lower limb.