Irish family presenting with novel form of autosomal dominant episodic ataxia. DNA from the 13 family members identified above was available for molecular analysis (I-2, II-3, II-5, II-6, II-7, II-10, II-17, II-18, III-5, III-6, III-7, III-8 and III-12, marked by a black star or a white star on a black background). Exome sequencing was performed on six of these samples (I-2, II-3, II-6, II-7, III-6 and III-12, represented by a white star on a black background).