ICD-11 definition : Spinocerebellar ataxia type 12 (SCA12) is a very rare subtype of type I autosomal
dominant cerebellar ataxia (ADCA type I). It is characterized by the presence of action
tremor associated with relatively mild cerebellar ataxia. Associated pyramidal and
extrapyramidal signs and dementia have been reported.;
Spinocerebellar ataxia type 12 (SCA12) is a very rare subtype of type I autosomal
dominant cerebellar ataxia (ADCA type I). It is characterized by the presence of action
tremor associated with relatively mild cerebellar ataxia. Associated pyramidal and
extrapyramidal signs and dementia have been reported.