CACNA1A and familial or sporadic hemiplegic migraine: The wide spectrum of neurological disorders associated with heterozygous CACNA1A ranges from progressive or non-progressive cerebellar syndrome to paroxysmal epileptic and non-epileptic phenotypes and includes familial hemiplegic migraine type 1 (FHM1) [284], EIEE type 42 [285], congenital-ataxia [286], EA2 [135,136], and SCA6 [287].