Given that epilepsy overlaps with paroxysmal movement disorders such as focal dystonia [11], and the observation that CACNA1H functions in similar biological pathways as other known dystonia genes, we attempted to validate a role for CACNA1H in WC by screening the complete coding region of CACNA1H using a targeted array in a cohort of 82 genetically undiagnosed WC cases (both sporadic and familial). Here, CACNA1H is linked to focal dystonia.