Spinocerebellar Ataxia Type 6

**Semantic type:** Disease or Syndrome

**Definition:** An autosomal recessive spinocerebellar ataxia caused by an expanded CAG repeat in the CACNA1A gene, encoding voltage-dependent P/Q-type calcium channel subunit alpha-1A. It is an almost pure cerebellar syndrome, with onset typically between the ages of 20 to 60.

**Synonyms:** - SCA6