SCA6 is not the only disease that affects the P/Q channel alpha subunit: deletion mutations of the same gene underlie episodic ataxia type 2 (EA2) in patients, which also demonstrate gaze impairments [38].( Together these findings provide insight into the consequences of P/Q channelopathy on behavior. The gene discussed is CACNA1A; the disease is Familial paroxysmal ataxia.