CACNA1A and Familial paroxysmal ataxia: Episodic ataxia type 2 and spinocerebellar ataxia type 6: Other mutations in CACNA1A can cause episodic ataxia type 2 and spinocerebellar ataxia type 6, two ataxic disorders also associated with migraine as part of the clinical phenotype in many of those affected [78].