In addition, defects in various potassium channels (KCNC1, KCTD7) have been associated with PMEs such as myoclonus epilepsy and ataxia due to potassium channel mutations (MEAK) and KCTD7-related PME (EPM3) [1, 23]. Here, KCNC1 is linked to progressive myoclonic epilepsy type 3.