CACNA1A and episodic ataxia type 2: Different mutations in the CACNA1A gene, encoding for the pore-forming, voltage-sensing α1A-subunit of voltage-dependent Ca2+ Cav2.1 type channels (P/Q-type), are known to result in neurological disorders, such as episodic ataxia type 2 (EA2), familial hemiplegic migraine type 1 (FHM1) and SCA type 6 (SCA6; Table 1) [27,28,29].