Mutations in CACNA1A have been associated with several autosomal dominant neurologic disorders, including familial hemiplegic migraine type 1 (FHM1), episodic ataxia type 2 (EA2), and spinocerebellar ataxia type 6 (SCA6) [3]. The gene discussed is CACNA1A; the disease is spinocerebellar ataxia type 6.